New Holland T8.320 PST TIER 2 Tractor Service Repair Manual [ZGRE05001- ].pdf

© 2017 CNH Industrial America LLC. All Rights Reserved.
SERVICE MANUAL
T8.320 / T8.350 / T8.380 / T8.410 /
T8.380 SmartTrax™
/ T8.410 SmartTrax™
Powershift Transmission (PST)
Tractor
PIN ZGRE05001 and above; PIN ZHRE01013 and above
Part number 48123737
1st
edition English
April 2017
SERVICE
MANUAL
T8.320 / T8.350 /
T8.380 / T8.410 /
T8.380 SmartTrax™
/
T8.410 SmartTrax™
Powershift
Transmission (PST)
Tractor
PIN ZGRE05001 and above;PIN ZHRE01013 and above
1/5
Part number 48123737

SERVICE MANUAL
T8.320 PST TIER 2 [ZGRE05001 - ], T8.350 PST TIER 2 CHELNY [ZGRE05001 -
], T8.350 PST TIER 2 [ZGRE05001 - ], T8.380 PST TIER 2 CHELNY [ZGRE05001
- ], T8.380 PST TIER 2 [ZGRE05001 - ], T8.380 SmartTrax™ PST TIER 2
[ZGRE05001 - ], T8.410 PST TIER 2 CHELNY [ZGRE05001 - ], T8.410 PST TIER
2 [ZGRE05001 - ], T8.410 SmartTrax™ PST TIER 2 [ZGRE05001 - ]
48123737 21/04/2017
EN

Link Product / Engine
Product Market Product Engine
T8.320 PST TIER 2 [ZGRE05001
- ]
Latin America F2CFA613G*E024
- ]
Asia Pacific F2CFA613G*E024
- ]
Middle East Africa F2CFA613G*E024
T8.350 PST TIER 2 CHELNY
[ZGRE05001 - ]
Asia Pacific F2CFA613D*E024
- ]
Latin America F2CFA613D*E024
- ]
Middle East Africa F2CFA613D*E024
- ]
[ZGRE05001 - ]
Asia Pacific F2CFA613B*E024
- ]
- ]
Middle East Africa F2CFA613B*E024
- ]
Latin America F2CFA613B*E024
[ZGRE05001 - ]
- ]
- ]
- ]
T8.380 SmartTrax™ PST TIER 2
[ZGRE05001 - ]
Middle East Africa F2CFA613B*E024
[ZGRE05001 - ]
Latin America F2CFA613B*E024
[ZGRE05001 - ]
[ZGRE05001 - ]
[ZGRE05001 - ]
[ZGRE05001 - ]
48123737 21/04/2017

Contents
INTRODUCTION
Engine....................................................................................... 10
[10.001] Engine and crankcase ............................................................. 10.1
[10.101] Cylinder heads ..................................................................... 10.2
[10.202] Air cleaners and lines .............................................................. 10.3
[10.206] Fuel filters .......................................................................... 10.4
[10.216] Fuel tanks .......................................................................... 10.5
[10.218] Fuel injection system............................................................... 10.6
[10.254] Intake and exhaust manifolds and muffler ......................................... 10.7
[10.304] Engine lubrication system.......................................................... 10.8
[10.310] Aftercooler.......................................................................... 10.9
[10.400] Engine cooling system ........................................................... 10.10
[10.414] Fan and drive .................................................................... 10.11
Power coupling........................................................................... 19
[19.100] Drive shaft.......................................................................... 19.1
[19.110] Flywheel damper ................................................................... 19.2
[19.120] Drive shaft shield assembly ........................................................ 19.3
Transmission.............................................................................. 21
[21.105] Powershift transmission hydraulic components.................................... 21.1
[21.113] Powershift transmission ............................................................ 21.2
[21.135] Powershift transmission external controls.......................................... 21.3
[21.155] Powershift transmission internal components...................................... 21.4
[21.200] Dropbox ............................................................................ 21.5
[21.900] Hydraulic pump drive............................................................... 21.6
Four-Wheel Drive (4WD) system .................................................. 23
[23.202] Electro-hydraulic control ........................................................... 23.1
48123737 21/04/2017

[23.314] Drive shaft.......................................................................... 23.2
Front axle system ....................................................................... 25
[25.100] Powered front axle ................................................................. 25.1
[25.102] Front bevel gear set and differential ............................................... 25.2
[25.108] Final drive hub, steering knuckles, and shafts ..................................... 25.3
[25.122] Axle suspension control............................................................ 25.4
Rear axle system........................................................................ 27
[27.100] Powered rear axle.................................................................. 27.1
[27.106] Rear bevel gear set and differential................................................ 27.2
[27.120] Planetary and final drives .......................................................... 27.3
[27.610] Rear axle track yoke assembly .................................................... 27.4
Power Take-Off (PTO)................................................................. 31
[31.104] Rear electro-hydraulic control...................................................... 31.1
[31.110] One-speed rear Power Take-Off (PTO) ............................................ 31.2
[31.114] Two-speed rear Power Take-Off (PTO) ............................................ 31.3
[31.146] Front Power Take-Off (PTO) ....................................................... 31.4
Brakes and controls .................................................................... 33
[33.110] Parking brake or parking lock ...................................................... 33.1
[33.202] Hydraulic service brakes ........................................................... 33.2
[33.220] Trailer brake hydraulic control...................................................... 33.3
[33.224] Trailer brake pneumatic control .................................................... 33.4
Hydraulic systems....................................................................... 35
[35.000] Hydraulic systems.................................................................. 35.1
[35.102] Pump control valves................................................................ 35.2
[35.106] Variable displacement pump ....................................................... 35.3
[35.114] Three-point hitch control valve ..................................................... 35.4
[35.124] Three-point hitch hydraulic adjustment ............................................ 35.5
[35.204] Remote control valves ............................................................. 35.6
48123737 21/04/2017

[35.300] Reservoir, cooler, and filters........................................................ 35.7
[35.304] Combination pump units ........................................................... 35.8
Hitches, drawbars, and implement couplings.................................. 37
[37.110] Rear three-point hitch .............................................................. 37.1
[37.162] Front hitch.......................................................................... 37.2
Frames and ballasting ................................................................. 39
[39.100] Frame .............................................................................. 39.1
Steering..................................................................................... 41
[41.101] Steering control .................................................................... 41.1
[41.200] Hydraulic control components...................................................... 41.2
[41.206] Pump ............................................................................... 41.3
[41.432] Autoguidance steering ............................................................. 41.4
Wheels...................................................................................... 44
[44.520] Rear wheels........................................................................ 44.1
Tracks and track suspension........................................................ 48
[48.100] Tracks .............................................................................. 48.1
[48.130] Track frame and driving wheels .................................................... 48.2
[48.134] Track tension units ................................................................. 48.3
[48.138] Track rollers ........................................................................ 48.4
Cab climate control ..................................................................... 50
[50.100] Heating ............................................................................. 50.1
[50.200] Air conditioning..................................................................... 50.2
[50.300] Cab pressurizing system ........................................................... 50.3
Electrical systems....................................................................... 55
[55.000] Electrical system ................................................................... 55.1
[55.010] Fuel injection system............................................................... 55.2
[55.012] Engine cooling system ............................................................. 55.3
48123737 21/04/2017

[55.013] Engine oil system .................................................................. 55.4
[55.014] Engine intake and exhaust system................................................. 55.5
[55.015] Engine control system.............................................................. 55.6
[55.024] Transmission control system....................................................... 55.7
[55.045] Front axle control system .......................................................... 55.8
[55.047] Steering control system ............................................................ 55.9
[55.050] Heating, Ventilation, and Air-Conditioning (HVAC) control system............... 55.10
[55.100] Harnesses and connectors....................................................... 55.11
[55.130] Rear three-point hitch electronic control system ................................. 55.12
[55.302] Battery............................................................................ 55.13
[55.408] Warning indicators, alarms, and instruments .................................... 55.14
[55.512] Cab controls...................................................................... 55.15
[55.640] Electronic modules ............................................................... 55.16
[55.DTC] FAULT CODES.................................................................. 55.17
Platform, cab, bodywork, and decals............................................. 90
[90.100] Engine hood and panels ........................................................... 90.1
[90.102] Engine shields, hood latches, and trims ........................................... 90.2
[90.124] Pneumatically-adjusted operator seat.............................................. 90.3
[90.150] Cab................................................................................. 90.4
[90.151] Cab interior......................................................................... 90.5
[90.160] Cab interior trim and panels........................................................ 90.6
48123737 21/04/2017

INTRODUCTION
48123737 21/04/2017
1

INTRODUCTION
Foreword - Important notice regarding equipment servicing
All repair and maintenance work listed in this manual must be carried out only by qualified dealership personnel,
strictly complying with the instructions given, and using, whenever possible, the special tools.
Anyone who performs repair and maintenance operations without complying with the procedures provided herein
shall be responsible for any subsequent damages.
The manufacturer and all the organizations of its distribution chain, including - without limitation - national, regional, or
local dealers, reject any responsibility for damages caused by parts and/or components not approved by the manu-
facturer, including those used for the servicing or repair of the product manufactured or marketed by the manufacturer.
In any case, no warranty is given or attributed on the product manufactured or marketed by the manufacturer in case
of damages caused by parts and/or components not approved by the manufacturer.
The manufacturer reserves the right to make improvements in design and changes in specifications at any time without
notice and without incurring any obligation to install them on units previously sold. Specifications, descriptions, and
illustrative material herein are as accurate as known at time of publication but are subject to change without notice.
In case of questions, refer to your NEW HOLLAND Sales and Service Networks.
48123737 21/04/2017
3

INTRODUCTION
Safety rules
Personal safety
This is the safety alert symbol. It is used to alert you to potential personal injury hazards. Obey all
safety messages that follow this symbol to avoid possible death or injury.
Throughout this manual you will find the signal words DANGER, WARNING, and CAUTION followed by special in-
structions. These precautions are intended for the personal safety of you and those working with you.
Read and understand all the safety messages in this manual before you operate or service the machine.
DANGER indicates a hazardous situation that, if not avoided, will result in death or serious injury.
WARNING indicates a hazardous situation that, if not avoided, could result in death or serious injury.
CAUTION indicates a hazardous situation that, if not avoided, could result in minor or moderate injury.
FAILURE TO FOLLOW DANGER, WARNING, AND CAUTION MESSAGES COULD RESULT
IN DEATH OR SERIOUS INJURY.
Machine safety
NOTICE: Notice indicates a situation that, if not avoided, could result in machine or property damage.
Throughout this manual you will find the signal word Notice followed by special instructions to prevent machine or
property damage. The word Notice is used to address practices not related to personal safety.
Information
NOTE: Note indicates additional information that clarifies steps, procedures, or other information in this manual.
Throughout this manual you will find the word Note followed by additional information about a step, procedure, or
other information in the manual. The word Note is not intended to address personal safety or property damage.
48123737 21/04/2017
4

INTRODUCTION
Safety rules - General maintenance safety
General maintenance safety
Keep the area used for servicing the machine clean and dry. Clean up spilled fluids.
Service the machine on a firm, level surface.
Install guards and shields after you service the machine.
Close all access doors and install all panels after servicing the machine.
Do not attempt to clean, lubricate, clear obstructions, or make adjustments to the machine while it is in motion or while
the engine is running.
Always make sure that working area is clear of tools, parts, other persons and pets before you start operating the
machine.
Unsupported hydraulic cylinders can lose pressure and drop the equipment, causing a crushing hazard. Do not leave
equipment in a raised position while parked or during service, unless the equipment is securely supported.
Jack or lift the machine only at jack or lift points indicated in this manual.
Incorrect towing procedures can cause accidents. When you tow a disabled machine follow the procedure in this
manual. Use only rigid tow bars.
Stop the engine, remove the key, and relieve pressure before you connect or disconnect fluid lines.
Stop the engine and remove the key before you connect or disconnect electrical connections.
Scalding can result from incorrect removal of coolant caps. Cooling systems operate under pressure. Hot coolant can
spray out if you remove a cap while the system is hot. Allow the system to cool before you remove the cap. When
you remove the cap, turn it slowly to allow pressure to escape before you completely remove the cap.
Replace damaged or worn tubes, hoses, electrical wiring, etc.
The engine, transmission, exhaust components, and hydraulic lines may become hot during operation. Take care
when you service such components. Allow surfaces to cool before you handle or disconnect hot components. Wear
protective equipment when appropriate.
When welding, follow the instructions in the manual. Always disconnect the battery before you weld on the machine.
Always wash your hands after you handle battery components.
48123737 21/04/2017
5

INTRODUCTION
Product identification - Machine orientation
T8.320 PST TIER 2 [ZGRE05001 - ] APAC --- LA --- MEA
T8.380 PST TIER 2 CHELNY [ZGRE05001 - ] APAC
T8.380 SmartTrax™ PST TIER 2 [ZGRE05001 - ] APAC --- LA --- MEA
T8.410 PST TIER 2 CHELNY [ZGRE05001 - ] APAC
T8.410 SmartTrax™ PST TIER 2 [ZGRE05001 - ] APAC --- LA --- MEA
RAIL14TR02056GA 1
The right hand and left hand side of the tractor used in this manual are the same as your right hand and left hand
when sitting in the tractor seat looking forward.
48123737 21/04/2017
30

SERVICE MANUAL
Engine
T8.320 PST TIER 2 [ZGRE05001 - ], T8.350 PST TIER 2 CHELNY [ZGRE05001 -
], T8.350 PST TIER 2 [ZGRE05001 - ], T8.380 PST TIER 2 CHELNY [ZGRE05001
- ], T8.380 PST TIER 2 [ZGRE05001 - ], T8.380 SmartTrax™ PST TIER 2
[ZGRE05001 - ], T8.410 PST TIER 2 CHELNY [ZGRE05001 - ], T8.410 PST TIER
2 [ZGRE05001 - ], T8.410 SmartTrax™ PST TIER 2 [ZGRE05001 - ]
48123737 21/04/2017
10

Engine - Engine and crankcase
Visual external differences for T8. tractor engines
There are a few things that make the FPT Cursor® 9 engine used in the T8. tractors visually and mechanically
different from other Cursor® 9 applications.
RAIL15TR00608GA 3
1. The fuel pump sits higher and closet to the center line of the engine.
2. A two piece valve cover assembly that allows for valve adjustment without removing the entire cover.
3. The rear cover is an oval shape where on other Cursor® 9 engines it’s round.
4. The flywheel speed sensor is located on the right side of the engine, others have on the left side of the engine.
5. The turbocharger is moved higher and toward the center line of the engine.
6. Exhaust flap for TIER 4B.
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Exhaust brake
Admission phase:
Intake of fresh air.
Compression phase:
Energy is stored in the
compressed air, braking
effect increases with
compression
Top dead center:
Exhaust valves open,
compressed air is released,
energy is blown out.
Exhaust phase:
Cylinder is empty, no energy
exchange. Exhaust gases
impact against the turbine,
creating an additional
braking effect.
All Cursor® engines are equipped with an advanced
engine brake system: the Iveco Turbo Brake (IBT)
system.
• Decompression engine brake
• Quick responding
• Integrated in the engine control
• Linked to cruise control
• Linked to EBS
Advantage
• Less brake pad wear
• Automatically engaged
Benefit
• Reduced operation cost
• Operator ease
The engine brake is controlled by the Tractor Control Unit
(TCU). The Electronic Service Tool (EST) is used to con-
figure the TCU as to whether or not the tractor has an
engine brake.
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The engine brake is activated when the pedal left of the
clutch is depressed.
RCPH11CCH481AAA 4
Air Induction - cross flow cylinder head
The cylinder head is of the cross flow design, inlet on one
side and exhaust on the other. This and four valves per
cylinder give it excellent breathing ability and efficient tem-
perature control. The air is supplied to the inlet by a waste-
gate turbocharger or a Variable Geometry Turbocharger
(VGT).
RAIL15TR00376BA 5
Wastegate turbocharger
The wastegate turbocharger allows for a larger tur-
bocharger to be installed producing higher boost pres-
sures in the low and midrange rpm while not over-boosting
at high rpm.
Intake pressure builds against a diaphragm in the waste-
gate and opens a valve allowing exhaust to bypass the
turbine therefore slowing the compressor and limiting the
pressure in the intake manifold.
RAIL15TR00396BA 6
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Electronically Variable Geometry Turbocharger (eVGT)
RAIL15TR00383BA 7
The electronically Variable Geometry Turbocharger
(eVGT) is used on the TIER 4A T8.420 and TIER 4B
T8.350, T8.380, T8.410 and T8.435. The eVGT is
electronically controlled by the Engine Control Unit
(ECU).
RAIL15TR00395BA 8 RAIL15TR00394BA 9
Vanes open (low boost) Vanes closed (high boost)
The eVGT uses a series of aerodynamic vanes to direct exhaust toward the turbine controlling both the velocity and
angle the exhaust contacts the turbine. This gives the ECU the ability to dynamically “tune” the boost pressure at any
given engine speed and load, Improving performance and fuel economy.
Fully open the velocity slows and the angle is decreased therefore the turbine and compressor turn slower producing
less boost. When needed, the vanes close increasing the velocity and angle, therefore increasing turbine and com-
pressor speed, producing higher boost anytime it is needed across the entire operating range of the engine.
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EDC17CV41
A new Engine Control Unit (ECU) is used on TIER 4B
engines, the EDC17CV41. It is used on FPT engines
from the 4.5 L NEF to the 12.9 L Cursor® engines. t
has two 96–pin electrical connectors: one for the engine
components and one for the tractor connections. Pin
connections will be common for all the CNH/FPT engines
using this controller.
1. Tractor connector
2. Engine connector
RAIL14TR00234PA 10
The EDC17CV41 controls all engine and Selective
Catalytic Reduction (SCR) functions.
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Lubrication System
RAIL15TR00416GA 11
Oil pressure is controlled by a 5 bar (72.5 psi) relief valve (1) in the oil galley coming from the gear type oil pump
(2) located behind the rear cover of the engine. The oil pump also has an over pressurization relief valve (3) set at
approximately 10 bar (145 psi).
RAIL15TR00367AA 12
RAIL15TR00389BA 13
A 5 bar (72.5 psi) oil pressure control valve (1) is located on the left hand side of the engine. The oil pump assembly
(2) includes an over pressurization relief valve (3) that protects the pump. The valve opens at 9.4 – 10.8 bar (136.3
– 156.6 psi).
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Blow-by recirculation
Blow-by is controlled by a rotary filter bolted to the rear of
the camshaft. As the cam turns excess oil is thrown off by
centrifugal force, finer oil is filtered out.
The blow-by then passes through the center of the
camshaft and exits at the front.
This filter must be replaced at regular intervals or the en-
gine will build up excessive pressure in the crank case.
RAIL15TR00366AA 14
Built into the cover at the front is a valve that allows
blow-by pressures out, but will not allow atmospheric
pressure into the crankcase.
This filtered air is directed back into the inlet and
re-burned.
RAIL15TR00377BA 15
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Connecting Rods
Connecting rods must all be the same weight class in an
engine. The weight class is identified by a color swatch
on the connecting rod.
There are three classes of crankshaft bearing diameters
(bore size) on the connecting rod. The bore size is marked
by a color code on the rod. The oil clearance is deter-
mined by the connecting rod bore size and the crankshaft
journal size. Based on connecting rod bore diameter and
the crankshaft journal diameter a bearing set must be de-
termined.
Connecting rods are the fracture split type. Care must be
taken when handling these rods as any damage to the
cap/rod mating area requires that the rod be replaced.
Connecting rod
weight, class and
color
Bore diameter and color
designation
85.987 - 58.996 Yellow
85.997 - 86.005 Green
3450 – 3470 grams
Grade A, Yellow
86.006 - 86.013 Blue
85.987 - 58.996 Yellow
85.997 - 86.005 Green
3471 – 3490 grams
Grade B, Green
86.006 - 86.013 Blue
85.987 - 58.996 Yellow
85.997 - 86.005 Green
3491 – 3510 grams
Grade C, Blue
86.006 - 86.013 Blue
RAIL15TR00397CA 16
Fracture split rods give nearly perfect alignment. In both
examples the red (rod) profiles are identical as are the
blue (cap) profiles. In the top example the rod fits perfectly
with the cap. In the lower example the rod is in the same
position but the cap is reversed, here the material peaks
align peak to peak and keeps cap from mating with the
rod.
RAIL15TR00375AA 17
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Crankshaft
• The crankshaft are classified in three classes: there are
three classes for the connecting rod journals and three
classes for the main journals.
• The crankshaft journal sizes are stamped on the rear
flyweight for both the connecting rod journals and the
main journals.
• Six digits for the connecting rods and seven digits for
the mains.
• The crankshaft may have been ground - 0.127 mm un-
dersize from the factory. A (1) preceding the six digits
is a standard crankshaft, a (2) preceding is for a crank-
shaft that has been ground undersize.
• The main bearing bores in the block are classed 1,2,or 3
and are located on the rear of the block lower right hand
side. If the classifications are not found, the crankshaft
must be measured and classified for each journal.
CRANKIDENTIFY 18
Standard crankshaft connecting rod bearing selection
Connecting rod bore
Standard crankshaft
connecting rod journals Class (1) Yellow paint Class (2) Green paint Class (3) Blue paint
Green Green Yellow
Class (1) 81.915 to 81.925
mm Green Yellow Yellow
Red Green Green
Class (2) 81.925 to 81.935
mm Green Green Yellow
Red Red Green
Class (3) 81.935 to 81.945
mm Red Green Green
NOTE: It may be necessary to mix two bearing shells in one journal.
0.127 mm under-size crankshaft connecting rod bearing selection
Connecting rod bore
- 0.127 mm Standard
crankshaft connecting rod
journals
Class (1) Yellow paint Class (2) Green paint Class (3) Blue paint
Green/Black Green/Black Yellow/Black
Class (1) 81.789 to 81.799
mm Green/Black Yellow/Black Yellow/Black
Red/Black Green/Black Green/Black
Class (2) 81.799 to 81.809
mm Green/Black Green/Black Yellow/Black
Red/Black Red/Black Green/Black
Class (3) 81.809 to 81.819
mm Red/Black Green/Black Green/Black
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Standard crankshaft main bearing selection
Main bearing bore fit class
Standard crankshaft
journals Class (1) Class (2) Class (3)
Green Green Yellow
Class (1) 92.970 to 92.980
mm Green Yellow Yellow
Red Green Green
Class (2) 92.980 to 92.990
mm Green Green Yellow
Red Red Green
Class (3) 92.990 to 93.000
mm Red Green Green
0.127 mm under-size crankshaft main bearing selection
Main bearing bore fit class
Standard crankshaft
journals Class (1) Class (2) Class (3)
Green/Black Green/Black Yellow/Black
Class (1) 92.843 to 92.853
mm Green/Black Yellow/Black Yellow/Black
Red/Black Green/Black Green/Black
Class (2) 92.853 to 92.863
mm Green/Black Green/Black Yellow/Black
Red/Black Red/Black Green/Black
Class (3) 92.863 to 93.872
mm Red/Black Green/Black Green/Black
With the variables in the bearing selection process, it is
always a good idea to use a plastic gauge to test each
journal for proper clearance.
RAIL15TR00392BA 19
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Camshaft installation and timing
When timing or adjusting valves it is critical to position
the A, B, C or D holes in the center of the view hole (1) at
the bottom of the bell housing. Serious engine damage
can occur if procedures are not followed carefully.
A. TDC 3 and 4
B. TDC 1 and 6
C. TDC 2 and 5
D. 54° before TDC 1 and 6
When timing or adjusting valves it is critical to position the
A, B, C or D holes in the center of the view hole (1) at the
bottom of the bell housing. Serious engine damage can
occur if procedures are not followed carefully.
NOTE: All references to flywheel rotation will be made as
viewed from the rear of the engine.
NOTE: The A, B and C holes are marked with one hash
mark (l) and the D’ hole with two hash marks (ll).
RAIL15TR00406FA 20
Position the flywheel at TDC 1 and 6, the B hole at the
bottom. This can be done by locating the D hole at the
bottom view hole in the bell housing, and then turning the
flywheel counterclockwise until the B hole appears.
Once the flywheel is in this position, it should be pinned
in position with the flywheel pinning tool 380000150 in the
sensor hole.
The engine is now ready to have the camshaft installed.
21
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Install the camshaft with the three holes (viewed from the
front) in the 9, 12 and 3 o’clock position.
NOTE: Do not trust the back of the cam for positioning.
RAIL15TR00380BA 22
Install the camshaft gear as shown.
In T8. tractors, the cam drive must be installed with the
three phonic wheel mounting holes making an arrow
pointing to the right. If this is not done, the phonic wheel
will not be able to be timed.
The slotted holes must be centered on the camshaft bolt
holes to make fine adjustments to the cam later in this
process.
Install the bolts and tighten, but do not torque yet; they will
be loosened later in this procedure.
RAIL15TR00378BA 23
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Install the rocker arm shaft assembly using tool number:
380000149.
RAIL15TR00374AA 24
Camshaft timing
The double idler gear location is fixed. The upper single
idler gear location can be adjusted and is used to set the
back lash between the idler gear and the camshaft gear.
This back lash has to be checked and set since this is
an overhead camshaft engine. All for the gear train is
mounted to the block except the camshaft gear which is
mounted to the cylinder head. Set the back lash before
the rocker arm assembly is installed.
Use a dial indicator to measure the camshaft gear to idler
back lash. Only measure the back lash between the upper
idler gear and the camshaft gear. Install the dial indicator
tangential to a camshaft gear tooth. Hold the idler so that
it does not move and rock the camshaft gear.
Correct back lash is 0.080 – 0.180 mm (0.003 – 0.007 in).
RAIL15TR01370BA 25
Rotate the flywheel clockwise until the D hole appears in
the bottom view hole. Install a dial indicator (1) on the
number 3 exhaust valve rocker arm camshaft roller (2) as
shown.
Preload the dial indicator 6.00 mm (0.24 in).
Rotate the engine clockwise until the dial indicator stops
moving: lift up on the valve end of the rocker arm to take
any clearance or play out and to verify that you are on the
inner base circle of the camshaft, the lowest point.
RAIL15TR01371BA 26
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Zero the dial indicator at this point.
On Tier III and later Cursor® 9 engines, rotate the engine counterclockwise until the dial indicator reads 5.29 mm
(0.21 in) ± 0.05 mm (0.002 in). Check to see if the D hole is in the window and that the timing pin will lock the flywheel.
If the D hole is not centered in the window and the flywheel cannot be locked:
1. Loosen the four bolts that retain the camshaft gear.
2. Rotate the flywheel until the D hole is in the timing window and the flywheel can be locked.
3. Tighten the four bolts that hold the camshaft gear to the camshaft.
Now, verify the timing by turning the engine clockwise 10 – 20° and then back counterclockwise until the D hole is in
the timing window and the timing pin will lock the flywheel. Verify the reading on the dial indicator is 5.29 mm (0.21 in)
± 0.05 mm (0.002 in).
NOTE: For engines without an engine brake engine serial numbers 25342 and after, set backlash to use 4.70 mm
(0.19 in).
NOTE: For engines with or without an engine brake prior to engine serial number 25342, set backlash to use 5.29 mm
(0.21 in).
Repeat the above procedure if necessary to obtain the specified timing. Once timing is within the specified range
tighten the camshaft gear retaining bolt to specified torque.
Ultimately timing for the cam on a T8. TIER 4 engine is: 5.29 mm (0.21 in) lift on number 3 exhaust rocker arm at 54°
before Top Dead Center (TDC) 1 and 6, which is the D hole on the flywheel, visible through the hole in the bottom of
the bell housing.
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New Holland T8.320 PST TIER 2 Tractor Service Repair Manual [ZGRE05001- ].pdf

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New Holland T8.320 PST TIER 2 Tractor Service Repair Manual [ZGRE05001- ].pdf