Case ih dx29 tractor service repair manual

87059228 3/05© 2005 CNH America LLC
Printed In U.S.A.
DX29, DX33
REPAIR MANUAL
COMPLETE CONTENTS
PIN #HBA010001 AND ABOVE
SECTION 00 - GENERAL INFORMATION 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 10 - ENGINE 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 18 - CLUTCH 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 21 - GEAR TRANSMISSION 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 25 - FWD FRONT AXLE 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 27 - DIFFERENTIAL, REAR AXLE 15. . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 29 - HYDROSTATIC TRANSMISSION 16. . . . . . . . . . . . . . . . . . . . . . . .
SECTION 31 - POWER TAKE-OFF SYSTEMS 20. . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 33 - BRAKES 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 35 - HYDRAULIC SYSTEM 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 41 - STEERING 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 44 - WHEELS AND TIRES 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 55 - ELECTRICAL SYSTEM 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SECTION 90 - PLATFORM 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
The following pages are the collation of the contents pages from each section and
chapter of the DX29 and DX33 Repair manual. Complete Repair part # 87059223.
The sections used through out all Case IH product Repair manuals may not be used for
each product. Each Repair manual will be made up of one or several books. Each book
will be labeled as to which sections are in the overall Repair manual and which sections
are in each book.
The sections listed above are the sections utilized for the DX29 and DX33 Tractors PIN
#HBA010001 and Above.

SECTION 00 -- GENERAL INFORMATION -- CHAPTER 1
00-1
SECTION 00 - GENERAL INFORMATION
Chapter 1 - General Information
CONTENTS
Section Description Page
Precautionary Statements 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Personal Safety 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Machine Safety 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Precautionary Statements 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing the Tractor 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating the Tractor 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Driving the Tractor 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating the PTO 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diesel Fuel 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Frame (ROPS) 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Decals 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Instruction Decals 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ecology and the Environment 11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
International Symbols 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
General Dimensions 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Minimum Hardware Tightening Torques 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
00 400 Lubrication and Maintenance 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lubrication 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Liquid Ballast (Optional) 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Tire Pressure 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Tire Liquid 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

00-2
PRECAUTIONARY
STATEMENTS
PERSONAL SAFETY
Throughout this manual and on machine decals, you will find precautionary statements (“DANGER”,
“WARNING”, and “CAUTION”) followed by specific instructions. These precautions are intended for the personal
safety of you and those working with you. Please take the time to read them.
DANGER
This word “DANGER” indicates an immediate hazardous situation that, if not avoided, will result in death
or serious injury. The color associated with Danger is RED.
WARNING
This word “WARNING” indicates a potentially hazardous situation that, if not avoided, could result in
death or serious injury. The color associated with Warning is ORANGE.
CAUTION
This word “CAUTION” indicates a potentially hazardous situation that, if not avoided, may result in minor
or moderate injury. It may also be used to alert against unsafe practices. The color associated with
Caution is YELLOW.
FAILURE TO FOLLOW THE “DANGER”, “WARNING”, AND “CAUTION” INSTRUCTIONS MAY RESULT IN
SERIOUS BODILY INJURY OR DEATH.
MACHINE SAFETY
The precautionary statement (“IMPORTANT”) is followed by specific instructions. This statement is intended for
machine safety.
IMPORTANT: The word “IMPORTANT” is used to inform the reader of something he needs to know to prevent
minor machine damage if a certain procedure is not followed.
INFORMATION
NOTE: Instructions used to identify and present supplementary information.

00-3
SAFETY
PRECAUTIONARY STATEMENTS
A careful operator is the best operator. Most accidents can be avoided by observing certain precautions. To help
prevent accidents, read the following precautions before operating this equipment. Equipment should be oper-
ated only by those who are responsible and instructed to do so.
Carefully review the procedures given in this manual with all operators. It is important that all operators be familiar
with and follow safety precautions.
THE TRACTOR
1. Read the Operator’s Manual carefully before
using the tractor. Lack of operating knowledge
can lead to accidents.
2. Use an approved roll bar and seat belt for safe
operation. Overturning a tractor without a roll bar
can result in death or injury. If your tractor is not
equipped with a roll bar and seat belt, see your
Case IH Dealer.
3. Always use the seat belt. The only instance when
the seat belt should not be used is if the roll bar
has been removed from the tractor.
4. If a front end loader is to be installed, always use
a FOPS (Falling Object Protective Structure)
canopy to avoid injury from falling objects.
5. Use the handholds and step plates when getting
on and off the tractor to prevent falls. Keep steps
and platform cleared of mud and debris.
6. Do not permit anyone but the operator to ride on
the tractor. There is no safe place for extra riders.
7. Keep all safety decals clean of dirt and grime,
and replace all missing, illegible, or damaged
safety decals. See the list of decals in the decal
section of this manual.
SERVICING THE TRACTOR
1. The cooling system operates under pressure
which is controlled by the radiator cap. It is
dangerous to remove the cap while the system is
hot. Always turn the cap slowly to the first stop
and allow pressure to escape before removing
the cap entirely.
2. Keep any type of open flame away from the
tractor and do not smoke while refueling. Wait for
the engine to cool before refueling.
3. Keep the tractor and equipment, particularly
brakes and steering, maintained in a reliable and
satisfactory condition to ensure your safety and
comply with legal requirements.
4. Keep open flame or cold weather starting aids
away from the battery to prevent fires or
explosions. Use jumper cables according to
instructions to prevent sparks which could cause
explosion.
5. Stop the engine before performing any service
on the tractor.
6. Escaping hydraulic/diesel fluid under pressure
can penetrate the skin causing serious injury. If
fluid is injected into the skin, obtain medical
attention immediately or gangrene may result.
• DO NOT use your hand to check for leaks.
Use a piece of cardboard or paper to search
for leaks.
• Stop the engine and relieve pressure before
connecting or disconnecting lines.
• Tighten all connections before starting the
engine or pressurizing lines.
7. Do not modify or permit anyone else to modify or
alter this tractor or any of its components or
functions without first consulting a Case IH
Dealer.
8. The fuel oil in the injection system is under high
pressure and can penetrate the skin. Unqualified
persons should not remove or attempt to adjust
a pump, injector, nozzle, or any other part of the
fuel injection system. Failure to follow these
instructions can result in serious injury.
9. Continuous long-term contact with used engine
oil may cause skin cancer. Avoid prolonged
contact with used engine oil. Wash skin promptly
with soap and water.

00-4
10. Some components of your tractor, such as
gaskets and friction surfaces (brake linings,
clutch linings, etc.) may contain asbestos.
Breathing asbestos dust is dangerous to your
health. You are advised to have any mainte-
nance or repair on such components carried out
by an authorized Case IH Dealer. However, if
service operations are to be undertaken on parts
that contain asbestos, the essential precautions
listed below must be observed:
• Work out of doors or in a well ventilated area.
• Dust found on the tractor or produced during
work on the tractor should be removed by
extraction, not by blowing.
• Dust waste should be dampened, placed in
a sealed container, and marked to ensure
safe disposal.
• If any cutting, drilling, etc. is attempted on
materials containing asbestos, the item
should be dampened and only hand tools or
low speed power tools used.
OPERATING THE TRACTOR
1. Before starting the tractor, apply the parking
brake, place the PTO lever in the “OFF” position,
the lift control lever in the down position, the
remote control valve levers in the neutral
position, and the transmission in neutral.
2. Always sit in the tractor seat when starting the
engine or operating controls. Do not start the
engine or operate controls while standing beside
the tractor.
3. Do not bypass the neutral start switches. Consult
your Case IH Dealer if your neutral start controls
malfunction. Use jumper cables only in the
recommended manner. Improper use can result
in tractor runaway.
4. Avoid accidental contact with the gear shift lever
while the engine is running, as this can cause
unexpected tractor movement.
5. Before getting off the tractor, disengage the PTO,
turn the engine off, and apply the parking brake.
Never get off the tractor while it is in motion.
6. Do not park the tractor on a steep incline.
7. Do not operate the tractor engine in an enclosed
building without adequate ventilation. Exhaust
fumes can cause death or illness.
8. If the power steering or engine ceases operating,
stop the tractor immediately.
9. Pull only from the drawbar or the lower link
drawbar in the down position. Use only a drawbar
pin that locks in place. Pulling from the tractor
rear axle or any point above the axle may cause
the tractor to upset.
10. If the front end of the tractor tends to rise when
heavy implements are attached to the three-
point hitch, install front end or front wheel
weights. Do not operate the tractor with a light
front end.
11. Always set the hydraulic selector lever in position
control when attaching or transporting equip-
ment. Ensure hydraulic couplers are properly
mounted and will disconnect safely in case of
accidental detachment of implement.
12. Do not leave equipment in the raised position.
13. Use the flasher/turn signal lights and SMV signs
when traveling on public roads both day and
night (unless prohibited by law).
14. When operating at night, adjust lights to prevent
blinding oncoming drivers.
DRIVING THE TRACTOR
1. Watch where you are going, especially at row
ends, on roads, around trees and low hanging
obstacles.
2. To avoid upsets, drive the tractor with care and at
a safe speed. Use extra caution when operating
over rough ground, when crossing ditches or
slopes, and when turning corners.
3. To provide two-wheel braking, lock tractor brake
pedals together when transporting on roads.
4. Do not coast or free wheel down hills. Use the
same gear when going downhill as is used when
going uphill.
5. Any towed vehicle with a total weight exceeding
that of the towing tractor should be equipped with
brakes for safe operation.
6. If the tractor becomes stuck or the tires become
frozen to the ground, back up the tractor to
prevent upset.
7. Always check overhead clearance, especially
when transporting the tractor.
8. When operating at night, adjust lights to prevent
blinding oncoming drivers.

00-5
OPERATING THE PTO
1. When operating PTO driven equipment, shut off
the engine and wait until the PTO stops before
getting off the tractor and disconnecting the
equipment.
2. Do not wear loose clothing when operating the
power take-off or when near rotating equipment.
3. When operating stationary PTO driven equip-
ment, always place both gear shift levers in
neutral, apply the tractor parking brake, and
block the rear wheels front and back.
4. To avoid injury, do not clean, adjust, unclog, or
service PTO driven equipment when the tractor
engine is running.
5. Ensure the PTO master shield is installed at all
times. Always replace the PTO shield cap when
the PTO is not in use.
DIESEL FUEL
1. UNDER NO CIRCUMSTANCES should gaso-
line, alcohol, or blended fuels be added to diesel
fuel. These combinations can create an
increased fire or explosive hazard. Such blends
are more explosive than pure gasoline in a
closed container such as a fuel tank. DO NOT
USE THESE BLENDS.
2. Never remove the fuel cap or refuel with the
engine running or hot.
3. Do not smoke while refueling or when standing
near fuel.
4. Maintain control of the fuel filler pipe nozzle when
filling the tank.
5. Do not fill the fuel tank to capacity. Allow room for
expansion.
6. Wipe up spilled fuel immediately.
7. Always tighten the fuel tank cap securely.
8. If the original fuel tank cap is lost, replace it with
a Case IH approved cap. A non-approved,
proprietary cap may not be safe.
9. Keep equipment clean and properly maintained.
10. Do not drive equipment near open fires.
11. Never use fuel for cleaning purposes.
12. Arrange fuel purchases so that winter grade fuels
are not held over and used in the spring.
SAFETY FRAME (ROPS)
Your Case IH tractor is equipped with a safety frame.
It must be maintained in a serviceable condition. Be
careful when driving through doorways or working in
confined spaces with low headroom.
UNDER NO CIRCUMSTANCES should you:
• modify, drill, or alter the safety frame in any way.
Doing so may render you liable to legal
prosecution.
• attempt to straighten or weld any part of the main
frame or retaining brackets which have suffered
damage. Doing so may weaken the structure and
endanger your safety.
• secure any parts on the main frame or attach
your safety frame with anything other than the
special high tensile bolts and nuts specified.
• attach chains or ropes to the main frame for
pulling purposes.
• take unnecessary risks even though your safety
frame affords you the maximum protection
possible.
WHEN YOU SEE THIS SYMBOL
IT MEANS:
ATTENTION!
BECOME ALERT!
YOUR SAFETY IS INVOLVED!

SECTION 10 - ENGINE - CHAPTER 1
10-1
SECTION 10 - ENGINE
Chapter 1 - Engine Systems
CONTENTS
Specifications 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cooling System (All Models) 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Bolt Torque Specifications 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Fuel System Bolt Torque Specifications 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Metric Bolt Torque Specifications 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Special Tools 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compression Test and Tools 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description of Operation -- General Information 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head and Valve Train Components 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Block Assembly 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overhaul -- Engine 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Preparation 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Injector and Glow Plug 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pressure Switch 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Temperature Sending Switch and Alternator 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fan, Water Pump and External Oil Tube 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head Cover 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rocker Arm Shaft and Support Bracket 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 101 Cylinder Head 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Tappet 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Shutoff Solenoid 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10-2
Timing Gear Cover 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 106 Timing Gears and Camshaft 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 102 Oil Sump 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Suction Pipe and Strainer 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Rods, Bearings, Pistons and Rings 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 103 Flywheel 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Backplate and Oil Seal 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft and Main Bearings 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 101 Cylinder Head 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Seats 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valves 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Replacement 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Guides 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Springs 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rocker Arms 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Push Rods 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Block 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 105 Pistons 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly and Inspection 41. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10-3
Piston Rings 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Rods 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting Rod Bearing Oil Clearance Check 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pistons, Rings and Connecting Rod 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 103 Main Bearing and Thrust Washer 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal and Inspection 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft Bearing (Bushing) 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft Main Bearing and Thrust Washer 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Port Block 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 106 Timing Gear 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Camshaft 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Disassembly 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly 51. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 103 Flywheel 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 102 Timing Gear Housing 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Oil Seal and Steering Pump Seal 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replacement 52. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 103 Crankshaft and Bearing Holder 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Oil Seal and Backplate 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 53. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flywheel 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10-4
10 105 Pistons and Connecting Rods 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 54. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Suction Pipe and Suction Strainer 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Sump 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 106 Camshaft and Camshaft Gear 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 106 Idler Gear, Oil Pump and Injection Timing 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timing Gear Cover 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Crankshaft Pulley 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Injection Pump 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Steering Pump 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 57. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 101 Head Gasket Selection 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cylinder Head 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 106 Valve Clearance Adjustment 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Head Cover 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Water Pump and Cooling Fan 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 59. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
External Oil Tube 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glow Plug and Connector 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Injector 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 60. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 218 Fuel Piping 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alternator and Temperature Sender Switch 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10-5
Exhaust Manifold 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 304 Description of Operation -- Engine Lubrication System 62. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 206 Oil Filter 65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Construction and Function 65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 304 Oil Pump 65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection 65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation and Adjustment 66. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engine Oil Pressure Check 67. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Pressure Relief Valve 68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil Consumption 68. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 400 Description of Operation -- Cooling System 69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Coolant 71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Radiator Cap 71. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 402 Thermostat 72. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 402 Water Pump 72. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 414 Cooling Fan 72. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overhaul -- Cooling System 73. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 406 Radiator 73. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 73. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 402 Water Pump 77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 78. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10 402 Thermostat 79. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 79. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 80. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10-6
SPECIFICATIONS
GENERAL DX29 DX33
Net Engine DIN in Kw(hp) 21.3 (28.6) 24.0 (32.3)
Gross Engine in Kw(hp) 21.6 (29.0) 24.6 (33.0)
PTO in Kw(hp)
w/9 x 3
w/HST
18.7 (25.1)
17.6 (23.6)
21.7 (29.1)
20.1 (26.9)
Engine Model J843 N843
Number of Cylinders 3 3
Bore x Stroke in mm (in.) 84 x 80 (3.31 x 3.15) 84 x 90 (3.31 x 3.54)
Displacement in L(In3) 1.33(81.2) 1.50(91.3)
Compression Ratio 22.7 22.5:1
Rated Speed in rpm 2800 2800
Muffler Location Under Hood Under Hood
Firing Order 1-2-3 1-2-3
Low Idle Speed in rpm 1000 1000
High Idle Speed in rpm 3040 3040
Cylinder Arrangement In-line Vertical In-line Vertical
Valve Arrangement Overhead Overhead
CYLINDER BLOCK DX29 DX33
Bore Standard in mm (in.)
84 - 84.019
(3.307 - 3.308)
84 - 84.019
(3.307 - 3.308)
Bore Maximum in mm (in.) 84.2 (3.315) 84.2 (3.315)
Head Surface Warp Standard in mm (in.) 0.05 (0.002) 0.05 (0.002)
Head Surface Warp Maximum in mm (in.) 0.12 (0.005) 0.12 (0.005)

10-19
20043767
4
20043768
5

10-24
OVERHAUL
ENGINE
Preparation
1. Turn coolant tap bolt, 1, counterclockwise to
drain fluid. Remove the radiator assembly. See
“Radiator Removal”, discussed later in this
section.
50020330
1
6
2. Remove the air cleaner assembly, 1, along with
the air cleaner hoses.
20020231
1
7
3. Remove bolts, 1, for final removal of air cleaner
assembly.
1
8

10-25
4. Remove the exhaust muffler, 1, and manifold
assembly, 2. Loosen bolt, 3, and bolt, 4,
Figure 10, to remove exhaust muffler. Loosen six
bolts, 5, to remove exhaust manifold.
1
3 2
5
9
4
19988039
10
FUEL INJECTOR AND GLOW PLUG
Removal
1. Clean all dirt and oil from the injectors, 2, and
surrounding areas.
2. Disconnect the fuel lines, 1, from the injectors
and cap all openings.
3. Remove the injector fuel leak-off line, 3.
4. Remove the injector assemblies, 2.
5. Remove the glow plug bus connector, 5, and
remove the glow plugs, 4.
1
3
45
2
11

10-26
OIL PRESSURE SWITCH
Removal
Remove the oil pressure switch, 1.
1
12
TEMPERATURE SENDING SWITCH AND
ALTERNATOR
Removal
1. Remove the temperature sending switch, 1, from
the front of the cylinder head.
2. Loosen the alternator mounting bolts, 2, and
remove the V-belt, 3, from the drive pulley.
3. Disconnect the alternator wires from the back of
alternator, 4.
4. Remove the alternator mounting bolts, 2, and
remove the alternator.
1
3
2
2
4
13
FAN, WATER PUMP AND EXTERNAL OIL
TUBE
Removal
1. Remove the fan and water pump assembly. See
“Fan Removal” and “Water Pump Removal”
discussed later in this section.
2. Remove the external oil transfer tube banjo bolt,
1, from the front of the cylinder head.
1
19988040
14

10-27
HEAD COVER
Removal
Remove the retaining bolts, 1, cap nuts, 2, and seal
washers, 3. Remove the head cover, 4, with gasket, 5.
20043769
1
2
3
4
5
15
ROCKER ARM SHAFT AND SUPPORT
BRACKET
Removal
Remove the bolts, 2, and nuts, 3. Remove the rocker
arm shaft and support bracket as an assembly, 1, and
gasket, 4.
NOTE: Alternately loosen the rocker support bolts a
turn at a time to prevent distorting the rocker shaft.
20043770
1
2
3
4
2
16

10-28
Op. 10 101
CYLINDER HEAD
Removal
1. Remove the valve stem caps, 1, and push
rods, 2.
NOTE: Keep all valve components in separately
marked containers for re-assembly in their original
location.
2. To remove the cylinder head, remove the cylinder
head bolts, 3, by alternately loosening a half turn
at a time to prevent warping the head.
1 2
3
17
VALVE TAPPET
Removal
Remove the valve tappets, 1, from the machined
bore in the cylinder block.
1
18
FUEL SHUTOFF SOLENOID
Removal
Remove the wire connector and unscrew the fuel
shutoff solenoid, 1.
1
19

10-29
TIMING GEAR COVER
Removal
1. Drain the engine crankcase oil.
2. Remove the crankshaft pulley.
3. Remove fuel shut off solenoid from engine block.
4. Loosen the four injection pump mounting bolts,
2, and raise the injection pump, 3, enough to
remove the spring pin, 1, and separate the
governor link from the control rack. Remove the
injection pump.
1
3
2
2
20
5. Remove the power steering pump reservoir tank
dipstick-filler cap, 2.
20020231
2
21
6. Remove the reservoir drain plug, 1, and drain the
hydraulic fluid out of the reservoir tank, 2, into a
suitable container.
19988041
1
2
22

10-30
7. Loosen the hose clamp, 2, on the suction tube,
3, and remove the suction hose from the steering
pump, 5.
8. Remove the pressure tube, 1, from the bottom of
the steering pump.
9. Remove the through bolts, 4, and remove the
steering pump from the front cover. Cap the lines
and pump openings.
19988042
51
23
4
23
10. Remove retaining nut, 1. Pull crankshaft pulley,
2, off of crankshaft, 3.
2
1
3
24
11. Remove the retaining bolts, 1, and lift the cover,
2, off the locating dowels. 1
2
25

10-31
Op. 10 106
TIMING GEARS AND CAMSHAFT
Removal
1. Remove retaining ring, 1, and remove the idler
gear, 3, and oil pump assembly, 2.
1
2
3
26
2. Remove the two bolts, 1, securing the keeper
plate, 3. One must be accessed using the access
hole, 2, in the cam gear.
3. Slide the camshaft and gear out of the camshaft
bore.
2
1
50043771
3
27
Op. 10 102
OIL SUMP
Removal
1. Remove the oil sump retainer bolts, 1.
2. Remove the oil sump and discard gasket.
1
28

10-32
OIL SUCTION PIPE AND STRAINER
Removal
1. Remove the two retaining bolts, 1.
2. Remove the oil strainer, 2, and rotate the oil
suction pipe, 3, out of its bore. Remove from the
front side of the block.
2
3
1
29
CONNECTING RODS, BEARINGS,
PISTONS AND RINGS
Removal
1. Remove the two bolts, 1, retaining the
connecting rod caps, 2.
2. Remove the connecting rod caps and lower half
of connecting rod bearing.
3. If necessary, remove any ridge from the top of the
cylinder bores using a suitable ridge reamer.
1 2
30
4. Push the piston and connecting rod out of the
cylinder block.
5. Replace the connecting rod cap to the piston
assembly it was removed from. Keep together in
cylinder sequence.
31

10-33
Op. 10 103
FLYWHEEL
Removal
1. Loosen the flywheel retaining bolts, 1.
2. Using a brass drift and hammer, tap the end of
the crankshaft, 2, to loosen the flywheel, 3, from
the shaft.
2
1
3
32
BACKPLATE AND OIL SEAL
Removal
1. Remove the backplate retaining bolts and
remove the backplate.
2. Remove the rear oil seal, 1.
1
33
CRANKSHAFT AND MAIN BEARINGS
Removal
1. Remove the crankshaft bearing holder retaining
bolts, 1.
2. Slide the crankshaft and main bearing assembly
through the rear of the engine.
1
34

10-34
Op. 10 101
CYLINDER HEAD
Disassembly
1. Clean the cylinder head and remove any carbon
deposits from around the valve heads.
2. Use a valve spring compressor and remove the
valve spring retainer locks, 1, spring, 2, and
spring retainer, 3, from each valve, 4.
3. Remove the valves and place the valve
components together in separately marked
containers for reassembly in their original
position.
2
31
4
35
Inspection and Repair
1. Clean all carbon deposits from the combustion
chamber and valve ports using a wire brush and
scraper.
2. Clean all dirt and residue from the gasket surface
using care not to scratch or nick the machined
surface.
3. Clean the cylinder head in solvent and air dry.
4. Inspect the head for cracks or damage in the
following areas:
-- Valve ports
-- Valve seats, 2
-- Prechamber, 3
-- External cracks in the water jackets, 1
5. Inspect the gasket surfaces for scratches or
nicks, which could cause leakage.
6. Examine the core hole plugs for rust or signs of
leakage. If a plug shows signs of damaging rust
or leakage, replace all plugs in the head.
7. Inspect the prechamber for carbon deposits and
looseness. Remove any carbon deposits found.
If prechamber is found to be loose, cylinder head
may be warped.
2 1
3
36

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10-35
8. Use a straight edge and a feeler gauge and
check the cylinder head for warp lengthwise,
crosswise, and diagonally.
37
VALVE SEATS
Inspection and Repair
Examine the valve seats and surface the seat if
damaged. Valve seat grinding requires that the seat
be ground to the correct width and properly
positioned. A valve that extends too deep into the
combustion area will result in valve burning. If the
valve is recessed too deep into the head it will cause
a rapid build-up of carbon deposits.
1. Check the seat for surface defects. Use a 45°
stone if necessary to reface. Grind away only
enough material to provide a smooth even seat.
1
2
3
38
1. Correct Valve Seat Width and Location
2. Correct Valve Head Margin N843 0.7 - 1.0 mm
(0.027 - 0.039I)
3. 45° Valve Seat Angle
2. Check the seat width. If necessary, use a 15°
stone to lower the seat contact point and use a
75° stone to raise the seat contact point.
NOTE: Refacing the seat should always be
coordinated with refacing of the valve to ensure a
compression tight fit.
150° 3
90° 1
30° 2
0.5 mm
(0.020 in.) min.
39
1. Seat angle - 45° Stone
2. Lower Seat Location - 15° Stone
3. Raise Seat Location - 75° Stone

10-36
VALVES
Inspection and Replacement
1. Clean all deposits from the valves using a soft
wire brush. Inspect the condition of the valves
and discard any that are badly burned, cracked,
or bent.
2
1
6 5
4
3
40
1. Margin Too Thin
Min. 0.5 mm (0.02I)
2. Bent Valve
3. Pitting
4. Indented
5. Wear or Nicking
6. Burned
2. Using a micrometer, measure the valve stem at
points “A,” “B” and “C.”
A B C
A B C
41
3. If inspection indicates that the valve may be
reused, the valve should be ground.
4. After grinding the valve and seat, check to ensure
the seat contacts the center of the valve face.
Using Prussian Blue, lightly coat the valve seat,
place the valve in position and rotate the valve
slightly while holding a light pressure against the
valve. If the blue is transferred to the center of the
valve face, the contact is correct.
1
2
42
1. 45° Angle Seat
2. Minimum Valve Margin

10-37
5. If Prussian Blue is not available, mark the valve
face or seat, 1, with a soft lead pencil. Rotate the
valve slightly in the seat. The penciled lines will
be broken at the seat contact area.
1
43
VALVE GUIDES
Thoroughly clean the valve guides before attempting
to check internal wear.
1. Using a telescoping gauge and micrometer,
measure the valve guide bore at the top and
bottom wear points, 1.
1
1
44
2. Determine the valve stem to valve guide
clearance, 1, by subtracting the valve stem
diameter from the valve guide diameter. Replace
valves if the clearance, 1, is more than 0.2 mm
(0.008I), intake valves, or 0.25 mm (0.010I),
exhaust valves.
3. Replace the cylinder head if excessive clearance
is determined and the valves have met all
specified measurement requirements. See
“Specifications,” discussed later in this section.
1
45

10-38
VALVE SPRINGS
1. Place the valve springs on a flat surface.
Measure the free length of the spring and
squareness. Replace springs that do not meet
the following specifications (all models):
Max. Out of Square Min. Free-Length
2.0 mm (0.079I) 33.5 mm (1.319I)
2. Place the springs in a suitable spring load tester
and measure the spring load rating. Replace
springs that do not meet the following specifica-
tions (all models):
Standard Maximum
8.1 kg (17.86 lbs.)
at 30.4 mm (1.197I)
7 kg (15.43 lbs.)
at 30.4 mm (1.197I)
46
ROCKER ARMS
1. Setscrew 4. Spring
2. Rocker Arm 5. Rocker Arm Shaft
3. Shims 6. Plug
1. On Model DX29, remove setscrew, 1, that
secures the rocker arm, 2, to the support.
2. On Model DX29, remove the plug, 6, from the
rear of the rocker shaft support.
3. On Model DX29, thread an 8 mm bolt into the rear
end of the rocker shaft and slowly withdraw the
rocker shaft while at the same time removing the
rocker arms and springs. On Model DX33, this
will be done on the front end.
4. Inspect the rocker arms and shaft for wear or
damage. Check the adjusting screws for
damaged threads or excessive wear.
20043772
5
4
3
2
1
DX29 Only
6
47
5. Check the valve stem contact area for pitting or
excessive wear. Slight wear patterns may be
removed using a fine grit oil stone.
20043773
5
4
3
2
DX33 Only
3
48

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