2013 hino 238 series truck service repair manual

FOREWORD
This workshop manual has been prepared to provide information regarding repair procedures on Hino Trucks.
Applicable for HINO 238, 258LP, 268, 338, 358 series, equipped with J08E-VB and J08E-VC engine
When making any repairs on your vehicle, be careful not to be injured through improper procedures.
As for maintenance items, refer to the Driver’s / Owner’s Manual.
All information and specifications in this manual are based upon the latest product information available at the time of printing.
Hino Motors Sales U.S.A., Inc. reserves the right to make changes at any time without prior notice.
Please note that the publications below have also been prepared as relevant workshop manuals for the components and sys-
tems in these vehicles.
Manual Name Pub. No.
Chassis Workshop Manual S1-UNAE12A 2/2
J08E-VB, VC Engine Workshop Manual S5-UJ08E12A
Trouble Shooting Workshop Manual
S7-UNAE12A 1/3
S7-UNAE12A 2/3
S7-UNAE12A 3/3
MENU

CHAPTER REFERENCES REGARDING THIS WORKSHOP MANUAL
Use this chart to the appropriate chapter numbers for servicing your particular vehicle.
CHAPTER
MANUAL NO. S1-UNAE12A 1/2 (U.S.A.), S1-CNAE12A 1/2 (CANADA)
MODELS HINO 238, 258LP, 268, 338, 358
Production Model
Code
NE8J, NF8J, NJ8J, NV8J, NH8J
GENERAL INTRODUCTION GN02-001
CLUTCH MAIN UNIT CL02-001 CL02-002
CLUTCH CONTROL CL03-001
TRANSMISSION MAIN UNIT TR02-001
AUTOMATIC TRANSMISSION TR04-001 TR04-002
TRANSMISSION/TRANSFER CONTROL TR06-001 TR06-002
PROPELLER SHAFT PP02-001
DIFFERENTIAL CARRIER DF02-001
BRAKE EQUIPMENT BR01-001 BR01-002
SERVICE BRAKE BR02-001 BR02-002
ABS (ANTI-LOCK BRAKE SYSTEM) BR03-001 BR03-002
EXHAUST BRAKE BR05-001
PARKING BRAKE BR07-001
STEERING EQUIPMENT SR01-001
STEERING UNIT SR02-001
POWER STEERING SR03-001
FRONT AXLE AX02-001
REAR AXLE AX03-001
WHEEL & TIRE AX04-001
SUSPENSION SU02-001
CHASSIS FRAME FC02-001
CAB CA02-001
ELECTRICAL EQUIPMENT EL01-001
ELECTRIC WIRE EL02-001
This manual does not contain items on half-tone dot meshing.

CLUTCH EQUIPMENT
CLUTCH MAIN UNIT
CLUTCH CONTROL
TRANSMISSION EQUIPMENT
TRANSMISSION MAIN UNIT
TRANSFER MAIN UNIT
AUTOMATIC TRANSMISSION
PTO (POWER TAKE-OFF)
TRANSMISSION / TRANSFER CONTROL
PROPELLER SHAFT
DIFFERENTIAL EQUIPMENT
DIFFERENTIAL CARRIER
INDEX: CHASSIS GROUP 1/4
PROPELLER SHAFT EQUIPMENT
BRAKE EQUIPMENT
SERVICE BRAKE
ABS
GENERAL INTRODUCTION
WORKSHOP
MANUAL

ES START (EASY & SMOOTH START) SYSTEM
EXHAUST BRAKE
RETARDER BRAKE
PARKING BRAKE
STEERING EQUIPMENT
STEERING UNIT
POWER STEERING
AXLE EQUIPMENT
FRONT AXLE
REAR AXLE
WHEEL & TIRE
SUSPENSION EQUIPMENT
SUSPENSION
CHASSIS EQUIPMENT
CHASSIS FRAME
COUPLER (5TH WHEEL)
PINTLE HOOK

CAB EQUIPMENT
CAB
ELECTRICAL EQUIPMENT
ELECTRIC WIRE
HYBRID SYSTEM

ENGINE CONTROL
FUEL CONTROL
BRAKE CONTROL
SUSPENSION CONTROL
CAB EQUIPMENT CONTROL
OTHERS

GENERAL INTRODUCTION (CHASSIS) GN02–1
GN02GENERAL INTRODUCTION (CHASSIS) GN02-001
GENERAL INTRODUCTION.....................GN02-2
GENERAL PRECAUTIONS.............................GN02-2
IDENTIFICATION INFORMATION...................GN02-5
HOW TO USE
THIS WORKSHOP MANUAL.........................GN02-12
PRECAUTIONS .............................................GN02-15
SEALANT ON THE TAPERED SCREW
FOR PIPING ..................................................GN02-18
NYLON TUBE REPLACEMENT METHOD ...GN02-19
METRIC INFORMATION ...............................GN02-21
SPECIFIED TORQUE
FOR STANDARD BOLTS AND NUTS ...........GN02-23
SPECIFIED TORQUE
FOR FLANGE BOLTS AND NUTS ................GN02-23
RECOMMENDED LUBRICANTS ..................GN02-25
VEHICLE LIFT
AND SUPPORT LOCATIONS........................GN02-27
INFORMATION DISPLAY ..............................GN02-29
SYMPTOM SIMULATION ..............................GN02-34
GLOSSARY................................................... GN02-36
GLOSSARY OF SAE AND HINO TERMS.....GN02-39

GENERAL INTRODUCTION (CHASSIS)GN02–2
GENERAL INTRODUCTION
GENERAL PRECAUTIONS
EN00Z08020100001
Some recommended and standard maintenance services for your vehicle are included in this section. When performing main-
tenance on your vehicle be careful not to get injured by improper work. Improper or incomplete work can cause a malfunction
of the vehicle which may result in personal injury and/or property damage. If you have any question about performing mainte-
nance, please consult your Hino dealer.
DEFINITION OF SAFETY TERMS
WARNING
When working on your vehicle, observe the following general precautions to prevent death, personal injury and/or
property damage in addition to the particular DANGERS, WARNINGS, CAUTIONS and NOTICES in each chapter.
• Always wear safety glasses or goggles to protect your eyes.
• Remove rings, watches, ties, loose hanging jewelry and loose clothing before starting work on the vehicle.
• Bind long hair securely behind the head.
• When working on the vehicle, apply the parking brake firmly, place the gear shift lever in "Neutral" or "N" and
block the wheels.
• Always turn off the starter switch to stop the engine, unless the operation requires the engine running. Remov-
ing the key from the switch is recommended.
• To avoid serious burns, keep yourself away from hot metal parts such as the engine, exhaust manifold, radia-
tor, muffler, exhaust pipe and tail pipe.
• Do not smoke while working on the vehicle since fuel, and gas from battery are flammable.
• Take utmost care when working on the battery. It contains corrosive sulfuric acid.
• Large electric current flows through the battery cable and starter cable. Be careful not to cause a short which
can result in personal injury and/or property damage.
• Read carefully and observe the instructions specified on the jack before using it.
• Use safety stands to support the vehicle whenever you need to work under it. It is dangerous to work under a
vehicle supported only by a jack.
• If it is necessary to run the engine after the hood is raised (tilted), make sure that the parking brake is firmly
applied, the wheels are blocked, and the gear shift lever is positioned in "Neutral" before staring the engine.
• Run the engine only in a well-ventilated area to avoid inhalation of carbon monoxide.
• Keep yourself, your clothing and your tools away from moving parts such as the cooling fan and V-belts when
the engine is running.
• Be careful not to damage lines and hoses by stepping or holding your feet on them.
• Be careful not to leave any tool in the engine compartment. The tool may be hit by moving parts, which can
cause personal injury.
Indicates an extremely hazardous situation if proper procedures are not followed and could
result in death or serious injury.
Indicates a potential hazardous situation if proper procedures are not followed and could
result in death or serious injury.
Indicates a hazardous situation if proper procedures are not followed and could result in
serious injury or damage to parts/equipment.
Indicates the need to follow proper procedures and to pay attention to precautions so that
efficient service is provided.
Provides additional information to help you to perform the repair efficiently.

GENERAL INTRODUCTION (CHASSIS) GN02–3
TOWING
• When being towed, always place the gear shift lever in "Neutral" and release the parking brake completely. In order to
protect the bumper, fit a protection bar against the lower edge of the bumper and put a wood block under the frame near
the No. 1 cross member when attaching the towing chain. Never lift or tow the vehicle if the chain is in direct contact with
the bumper.
1. Towing procedures
(1) Make sure that the propeller shaft of the vehicle to be towed is removed. When the differential gear or rear axle shaft is
defective, remove both right and left rear axle shafts, then cover the hub opening to prevent loss of axle lubricant and
entry of dirt or foreign matter.
(2) Use a heavy duty cable or rope when towing the vehicle. Fasten the cable securely to the towing hook on the frame.
(3) The angle of pulling direction of the cable fastened to the towing hook must not exceed 15q in horizontal and vertical
directions from the straight ahead, level direction. Avoid using the hook in a way that subjects it to jerk, as in towing a
vehicle trapped in a gutter.
(4) Keep the gear shift lever in Neutral.
(5) Make sure that the starter switch is kept in the "ON" position, if the engine is not running.
(6) Make sure that the engine of the towed vehicle is kept running. If the engine is off, no compressed air/ no vacuum will be
available for the brake. This is dangerous, as the brake system does not function if the engine is not running.
In addition, the power steering system will not function. The steering wheel, therefore, will become unusually hard to turn,
making it impossible to control the vehicle.
(7) Note that the engine brake and exhaust brake cannot be applied, if the propeller shaft is removed.
(8) Make a slow start to minimize shock. Towing speed should be less than 30 km/h {18 mile/h}.
2. If the engine of the towed vehicle is defective, make sure that the vehicle is towed only by a tow truck designed
for that purpose.
(1) Front end towing (with front wheels raised off the ground)
When towing from the front end with the front wheels raised off the ground, remove the rear axle shafts to protect the
transmission and differential gears from being damaged. The hub openings should be covered to prevent the loss of axle
lubricant or the entry of dirt or foreign matter. The above-mentioned precautions should be observed for vehicles
equipped with either manual or automatic transmission, and for even short distance towing. After being towed, check and
refill the rear axle housing with lubricant if necessary.
(2) Rear end towing
When being towed with the rear wheels raised off the ground, fasten and secure the steering wheel in a straight-ahead
position.
CLEAN AIR ACT
1. Heavy-duty engine rebuilding practices.
§ 86.004-40
• The provisions of this section are applicable to heavy-duty engines subject to model year 2004 or later standards and are
applicable to the process of engine rebuilding (or rebuilding a portion of an engine or engine system). The process of
engine rebuilding generally includes disassembly, replacement of multiple parts due to wear, and reassembly, and also
may include the removal of the engine from the vehicle and other acts associated with rebuilding an engine. Any deviation
from the provisions contained in this section is a prohibited act under section 203(a) (3) of the Clean Air Act (42 U.S.C.
7522(a) (3)).
(1) When rebuilding an engine, portions of an engine, or an engine system, there must be a reasonable technical basis for
knowing that the resultant engine is equivalent, from an emissions standpoint, to a certified configuration (i.e., tolerances,
calibrations, specifications) and the model year(s) of the resulting engine configuration must be identified. A reasonable
basis would exist if:
a. Parts installed, whether the parts are new, used, or rebuilt, are such that a person familiar with the design and func-
tion of motor vehicle engines would reasonably believe that the parts perform the same function with respect to emis-
sions control as the original parts; and
b. Any parameter adjustment or design element change is made only:
x In accordance with the original engine manufacturer's instructions; or
x Where data or other reasonable technical basis exists that such parameter adjustment or design element change,
when performed on the engine or similar engines, is not expected to adversely affect in-use emissions.
(2) When an engine is being rebuilt and remains installed or is reinstalled in the same vehicle, it must be rebuilt to a configu-
ration of the same or later model year as the original engine. When an engine is being replaced, the replacement engine
must be an engine of (or rebuilt to) a configuration of the same or later model year as the original engine.

(3) At time of rebuild, emissions-related codes or signals from on-board monitoring systems may not be erased or reset with-
out diagnosing and responding appropriately to the diagnostic codes, regardless of whether the systems are installed to
satisfy requirements in § 86.004-25 or for other reasons and regardless of form or interface. Diagnostic systems must be
free of all such codes when the rebuilt engine is returned to service. Such signals may not be rendered inoperative during
the rebuilding process.
(4) When conducting a rebuild without removing the engine from the vehicle, or during the installation of a rebuilt engine, all
critical emissions-related components listed in § 86.004-25(2) not otherwise addressed by paragraphs (1) through (3) of
this section must be checked and cleaned, adjusted, repaired, or replaced as necessary, following manufacturer recom-
mended practices.
(5) Records shall be kept by parties conducting activities included in paragraphs (1) through (4) of this section. The records
shall include at minimum the mileage and/or hours at time of rebuild, a listing of work performed on the engine and emis-
sions-related control components including a listing of parts and components used, engine parameter adjustments, emis-
sions-related codes or signals responded to and reset, and work performed under paragraph (4) of this section.
a. Parties may keep records in whatever format or system they choose as long as the records are understandable to an
EPA enforcement officer or can be otherwise provided to an EPA enforcement officer in an understandable format
when requested.
b. Parties are not required to keep records of information that is not reasonably available through normal business prac-
tices including information on activities not conducted by themselves or information that they cannot reasonably
access.
c. Parties may keep records of their rebuilding practices for an engine family rather than on each individual engine
rebuilt in cases where those rebuild practices are followed routinely.
d. Records must be kept for a minimum of two years after the engine is rebuilt.
2. Maintenance instructions.
§ 86.010-38
(1) For each new diesel-fueled engine subject to the standards prescribed in § 86.007-11, as applicable, the manufacturer
shall furnish or cause to be furnished to the ultimate purchaser a statement that
"This engine must be operated only with ultra low-sulfur diesel fuel (meeting EPA specifications for highway die-
sel fuel, including a 15 ppm sulfur cap)."

HOW TO USE THIS WORKSHOP MANUAL
EN00Z08020200002
This workshop manual is designed as a guide for servicing the vehicle.
An INDEX is provided on the first page of each chapter.
TROUBLESHOOTING is dealt with in each chapter.
When beginning operations, refer to the TROUBLESHOOTING section for
a guide to appropriate diagnosis.
SPECIAL TOOL is dealt with in each chapter.
When ordering a special tool, confirm the part number with the applicable
parts catalog.
• RERAIR PROCEDURES
Repair procedures when self-explanatory, such as simple installation
and removal of parts, have been omitted. Illustrations, such as the
one below, have been provided to make such simple procedures
clear. Only essential procedures requiring specific directions have
been dealt with explicitly.

CLUTCH MAIN UNIT (EATON 1401) CL02–1
CL02CLUTCH MAIN UNIT (EATON 1401) CL02-001
CLUTCH ASSEMBLY
(EATON SAS1401).................................... CL02-2
DATA AND SPECIFICATIONS ..........................CL02-2
DESCRIPTION .................................................CL02-2
TROUBLESHOOTING......................................CL02-3
SPECIAL TOOL................................................CL02-5
COMPONENT LOCATOR.................................CL02-6
OVERHAUL ......................................................CL02-7
CLUTCH ASSEMBLY
(EATON SOLO1401)............................... CL02-14
DATA AND SPECIFICATIONS ........................CL02-14
COMPONENT LOCATOR...............................CL02-14
OVERHAUL ....................................................CL02-15
INSPECTION AND REPAIR ...........................CL02-22

CLUTCH MAIN UNIT (EATON 1401)CL02–2
CLUTCH ASSEMBLY (EATON SAS1401)
DATA AND SPECIFICATIONS
EN02Z0202I200001
CLUTCH FACING Unit: mm {in.}
DESCRIPTION
EN02Z0202C100001
Material Sintered metal (Ceramic metal)
Type Dry single plate with damper spring
Inside diameter 222 {8.8}
Outside diameter 350 {13.8}
Thickness 11.5 {0.45}
12
SHTS02Z020200001
1 Clutch disc 2 Clutch cover

TROUBLESHOOTING
EN02Z0202F300001
Symptom Possible cause Remedy/Prevention
Clutch dragging. Clutch disc distorted or warped. Replace clutch disc.
Transmission input shaft worn. Replace input shaft and check clutch
hub for excessive wear. If worn,
replace disc. Check flywheel housing
alignment.
Excessive clutch control parts wear. Replace control parts.
Clutch control parts not functioning
properly.
Replace control parts.
Improper clutch control adjustment. Adjust clutch control.
Clutch disc assembly too thick. Replace clutch disc.
Clutch slipping. Release lever and release bearing
clearance incorrectly adjusted.
Adjust clearance.
Clutch disc facing gummed with oil or
grease.
Replace disc assembly.
Release bearing worn. Replace bearing.
Clutch pedal free-play incorrectly
adjusted.
Adjust free-play.
Compression spring weak. Replace cover assembly.
Clutch facing worn. Replace disc assembly.
Failing to remove plate from the clutch
pressure plate assembly.
Remove plate.
Driver riding clutch pedal. Do not ride the clutch pedal.
Vehicle vibrates when starting. Improper engine idling. Adjust idling.
Clutch control incorrectly adjusted. Adjust clutch control
Clutch disc facing gummed with oil or
grease.
Replace disc assembly.
Glazed flywheel friction surface. Deglaze flywheel surface with coarse
emery cloth, stroking parallel to
machining lines.
Clutch disc distorted or warped. Replace disc.
Improper clutch cover tightening. Tighten bolts.
Flywheel housing misalignment. Replace flywheel housing.
Abnormal noise in transmission. Malfunction of engine. Tune up engine.
Improper clutch disc used. Replace proper clutch disc.
Trouble in transmission. Check transmission.
The engine idle speed is low. Increase the idle speed.

Noisy clutch. Release bearing worn or dried. Replace release bearing.
Pilot bearing worn or dried. Replace pilot bearing.
Clutch disc distorted or warped. Replace clutch disc.
Flywheel housing misalignment. Replace flywheel housing.
Transmission input shaft or clutch disc
spline worn.
Clean and lubricate or replace.
Insufficient lubrication of pedal and its
accessories.
Lubricate.
Insufficient lubrication of release shaft
and release bearing hub.
Lubricate.
Transmission input shaft retainer
rusted or soiled.
Clean or replace if rusted.
Clutch pedal free-play incorrectly
adjusted.
Adjust free-Play.
Clutch pedal cannot be depressed. Clutch control incorrectly adjusted. Adjust clutch control.
Insufficient lubricant release shaft and
release bearing hub.
Lubricate.
Change in clutch pedal give. Air trapped in clutch fluid. Bleed air.
Symptom Possible cause Remedy/Prevention

SPECIAL TOOL
EN02Z0202K100001
Prior to starting a clutch overhaul, it is necessary to have these special tools.
Illustration Part number Tool name Remarks
S0965-01970
CLUTCH PILOT BEARING
PULLER
S0942-01442 SLIDING HAMMER
S0966-21410 CLUTCH ALIGNING ARBOR
S0940-91200 CRANKING TOOL

COMPONENT LOCATOR
EN02Z0202D100001
Tightening torque Unit: N˜m {kgf˜cm, lbf˜ft}
1 Clutch cover 3 Adjusting screw
2 Clutch disc 4 Bolt
A 50-64 {510-655, 37-47}
SHTS02Z020200006

OVERHAUL
EN02Z0202H200001
IMPORTANT POINT - DISMOUNTING
1. REMOVE THE TRANSMISSION, SUPPORTING ITS WEIGHT TO
PREVENT DAMAGE TO THE BEARING AND DISCS.
2. INSTALL TWO WOODEN SPACERS 1"-1-1/2" THICK BETWEEN
RELEASE BEARING AND COVER ASSEMBLY.
3. REMOVE THE CLUTCH FROM THE FLYWHEEL.
IMPORTANT POINT - INSPECTION AND REPLACE-
MENT
1. REPLACE THE PILOT BEARING.
(1) Remove the pilot bearing.
SST:
Pilot Bearing Puller (S0965-01970)
Sliding Hammer (S0942-01442)
(2) Using a suitable tapping rod, install the pilot bearing.
NOTICE
After installing the pilot bearing, ensure that it rotates smoothly.
2. CHECK THE FOLLOWING ITEMS FOR WEAR REPLACE ANY
WORN COMPONENTS:
(1) Cross-shafts and bushings
NOTICE
Excessive wear at these points can cause a side loading condition.
Also, inspect the remaining pivot points of the linkage for excessive
wear.
1.Remove the
transmission
SHTS02Z020200007
SHTS02Z020200008
SHTS02Z020200009
A.
Check cross-shafts
and bushings
SHTS02Z020200010

(2) Release yoke fingers
(3) Splines on the input shaft
NOTICE
Any wear on the splines will prevent the newly installed driven discs
from sliding freely, thus causing poor release (clutch drag). Select a
disc out of the new installation and slide it full length on the transmis-
sion splines. This will detect a twisted input shaft. Replace input shaft
if disc does not freely slide.
(4) Smooth area of input shaft
(5) Mating surfaces
NOTICE
Inspect the mating surfaces of both the transmission bell housing and
the flywheel housing. Any appreciable wear on either housing will
cause misalignment. Most wear will occur between the 3 and 8 o'clock
positions.
Replace housings if worn.
B.
Check release yoke
fingers
SHTS02Z020200011
D.
Check splines on the
input shaft
SHTS02Z020200012
E.
Check smooth
area of input
shaft for wear /
roughness
SAPH02Z080200001

IMPORTANT POINT - MOUNTING
1. INSERT TWO (2) 3/8" x 16 UNC x 3" (76 MM) LONG GUIDE STUDS
INTO THE TWO UPPER MOUNTING HOLES OF THE FLYWHEEL.
2. INSTALL THE DISC BY INSERTING THE ALIGNING TOOL
THROUGH THE DISC SPLINES AND THEN INTO THE PILOT
BEARING.
SST: Clutch Aligning Arbor (S0966-21410)
NOTICE
Make sure the side marked "Pressure Plate Side" faces the pressure
plate.
3. WITH THE ALIGNING TOOL STILL IN PLACE, CAREFULLY SLIDE
THE CLUTCH ASSEMBLY OVER THE ALIGNING TOOL AND THE
TWO (2) GUIDE STUDS WITH THE KWIK-ADJUST ALIGNED WITH
THE ACCESS HOLE IN THE BELL HOUSING.
4. INSTALL LOCKWASHER AND SIX (6) 3/8" x 16 UNC GRADE 5 OR
BETTER MOUNTING BOLTS AND HAND TIGHTEN.
(1) Remove the two (2) guide studs and replace with the remaining
mounting bolts with lockwasher. Using a torque wrench, progressively
tighten the eight (8) mounting bolts using the following crisis-cross
pattern. Starting at lower left.
Remove the shipping blocks from between the release bearing and
the cover assembly.
Tightening Torque:
50-64 N˜m{510-665 kgf˜cm, 37-47 lbf˜ft}
! CAUTION
Failure to tighten these bolts in this manner can:
• Prevent the clutch cover from "centering" into the pilot area of
the flywheel.
• Cause permanent damage to the clutch cover (i.e. become
cracked or broken).
• Cause the clutch assembly to be out-of balance with the fly-
wheel.
1.
Insert 2 guide studs
Guide studs
SHTS02Z020200014
2.
Insert the aligning
tool through release
bearing sleeve
Aligning tool
SHTS02Z020200015
8
1
5
3
7
2
6
4
4.
Place disc on aligning
tool properly
orientated
SHTS02Z020200016

5. REMOVE THE ALIGNING TOOL.
6. SHIFT THE TRANSMISSION INTO GEAR.
7. POSITION THE TRANSMISSION SO THAT IT IS BOTH SQUARE
TO AND ALIGNED WITH THE ENGINE.
5.
Remove aligning tool
SHTS02Z020200017
6.
Shift transmission into gear
Shift into gear
SHTS02Z020200018
7.
Align the transmission
to the engine
SHTS02Z020200019

8. WHILE MOVING THE TRANSMISSION FORWARD, ROTATE THE
OUTPUT SHAFT OF THE TRANSMISSION UNTIL THE SPLINES
OF BOTH THE INPUT SHAFT AND THE DISC(S) MESH WITH
EACH OTHER. WHILE PERFORMING THIS TASK, YOU MUST
ALSO ENSURE THAT THE YOKE FINGERS REMAIN IN THE UP
POSITION UNTIL THEY CAN BE ROTATED OVER THE RELEASE
BEARING HOUSING INTO THEIR FINAL POSITION.
! CAUTION
• Do not use the cross-shaft release lever (or a pipe over it) to pull
the transmission into its final position.
• Do not excessively force the transmission into the clutch assem-
bly or engine housing. If it does not enter freely, investigate the
cause of the problem and make any necessary changes.
• If the input shaft will not slide into the discs, they may need to be
repositioned. Do not let the transmission drop or hang unsup-
ported in the driven discs.
This can cause the discs to become distorted and the clutch will
not release.
9. INSTALL THE TRANSMISSION MOUNTING BOLTS AND TORQUE
TO THE PROPER SPECIFICATION.
Tightening Torque:
37.5-48.5 N˜m{382-494 kgf˜cm, 28-35 lbf˜ft}
IMPORTANT POINT - ADJUSTMENT
1. CHECK LOCATION OF THE KWIK-ADJUSTER£
(1) Remove the cover of inspection hole at the bottom of the clutch hous-
ing.
(2) If the Kwik-Adjuster exists in approachable position, adjustment can
be performed.
If position of the Kwik-Adjuster cannot be identified, perform following
procedure.
8.
Mesh input shaft and
disc (s) by rotating
output shaft
SHTS02Z020200020
SHTS02Z020200021
Socket wrench
Kwik-adjuster
SHTS02Z020200022

2. ARRANGE THE KWIK-ADJUSTER
(1) Set SST the crank pulley.
SST:
Cranking Tool (S0940-91200)
(2) Turn the crank pulley till the Kwik-Adjuster matches the inspection
hole.
3. ADJUSTING PROCEDURES
(1) Adjust the release bearing position;
• When the clutch disc is worn (pedal play less than limit)
Pedal play limit: 35 mm {1.38 in.}
• When the clutch disc replaced.
(2) Adjust the free travel by release cylinder push rod only;
• When the clutch disc or control linkage is replaced.
NOTICE
The above adjusting should be made after adjusting the release bear-
ing position.
(3) Manual Adjust: Kwik-Adjust£
• Depress adjusting bolt and rotate.
Kwik-Adjust will re-engage at 1/3 of a turn.
NOTICE
• Open-end wrenches are not recommended.
• Internal adjustments are performed with pedal down (clutch
released).
SST
Crank
pulley
Torque
wrench
SHTS02Z020200023
Kwik-adjuster
SHTS02Z020200024
1 STEP: Master cylinder
push rod play
2 STEP:
Release cylinder
push rod play
Clutch pedal play
SHTS02Z020200025
Adjusting bolt
(push toward
clutch)
Kwik-adjust
SAPH02Z080200006

4. ADJUST THE RELEASE BEARING POSITION
(1) Set 1.75" (44 mm) dimension: With pedal down, turn adjusting ring to
obtain approximately 1.75" (44 mm). Turning the adjusting ring clock-
wise moves the release bearing toward the transmission. Turning the
adjusting ring counterclockwise moves the release bearing toward the
engine.
(2) Check release travel dimensions with release yoke rotated toward
release bearing, eliminating excess play in system. Having set this,
depress pedal down fully releasing clutch and check release travel to
settings shown.
NOTICE
It may be necessary to reduce the 1.75" (44 mm) settings to be able to
achieve 0.500"-0.562" (13-14 mm) travel on some models of transmis-
sions.
5. ADJUST THE FREE TRAVEL
(1) Remove the return spring.
(2) Loosen the lock nut and turn the push rod counterclockwise until the
release bearing contacts the release lever plate or release lever.
(3) Turn the push rod clockwise about 3 1/3 turns.
(4) Tighten the lock nut.
Pedal
UP
Pedal
DOWN
SHTS02Z020200027
Master cylinder
Push rod
0
SHTS02Z020200028
Lock nut
3.18
SHTS02Z020200029
Standard: Clearance between release bearing and
release yoke: 3.18 mm {0.125 in.}

CLUTCH ASSEMBLY (EATON SOLO1401)
DATA AND SPECIFICATIONS
EN02Z0202I200002
CLUTCH FACING Unit: mm {in.}
COMPONENT LOCATOR
EN02Z0202D100002
Tightening torque Unit: N˜m {kgf˜cm, lbf˜ft}
Material Sintered metal (Ceramic metal)
Type Dry single plate with damper spring
Inside diameter 222 {8.8}
Outside diameter 350 {13.8}
Thickness 11.5 {0.45} Adjustment-Free
1 Clutch cover 3 Bolt
2 Clutch disc
A 50-64 {510-655, 37-47}
Shipping bolts (4)
to be removed
at installation
Wear indicator
Section B-B
SHTS02Z020200030

OVERHAUL
EN02Z0202H200002
IMPORTANT POINT - DISMOUNTING
1. REMOVE THE TRANSMISSION, SUPPORTING ITS WEIGHT TO
PREVENT DAMAGE TO THE BEARING AND DISCS.
NOTICE
If a SOLO Clutch is to be removed and reinstalled on the flywheel, four
(4) shipping bolts must be installed prior to unbolting the clutch (3/8"
x 16 UNC x 1-1/4").
2. LOCATE FOUR (4) 3/8" x 16 UNC x 1 - 1/4", HEX HEAD MACHINE
SCREWS. INSTALL THEM IN THE 4 COVER HOLES, TURNING
THEM ONE COMPLETE TURN AFTER THEY CONTACT THE
COVER.
3. REMOVE THE CLUTCH FROM THE FLYWHEEL.
IMPORTANT POINT - INSPECTION AND REPLACE-
MENT
1. REPLACE THE PILOT BEARING.
(1) Remove the pilot bearing.
SST:
Pilot Bearing Puller (S0965-01970)
Sliding Hammer (S0942-01442)
1.
Remove the
transmission
SHTS02Z020200031
2.
Located 4 hex head
machine screws
(4) 3/8" x 16 x 1-1/4" UNC
SHTS02Z020200032
SHTS02Z020200033

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(2) Using a suitable tapping rod, install the pilot bearing.
NOTICE
After installing the pilot bearing, ensure that it rotates smoothly.
2. CHECK THE FOLLOWING ITEMS FOR WEAR REPLACE ANY
WORN COMPONENTS.
(1) Cross-shafts and bushings
NOTICE
Excessive wear at these points can cause a side loading condition.
Also, inspect the remaining pivot points of the linkage for excessive
wear.
(2) Release yoke fingers
(3) Splines on the input shaft
NOTICE
Any wear on the splines will prevent the newly installed driven discs
from sliding freely, thus causing poor release (clutch drag). Select a
disc out of the new installation and slide it full length on the transmis-
sion splines. This will detect a twisted input shaft. Replace input shaft
if disc does not freely slide.
SHTS02Z020200034
A.
Check cross-shafts
and bushings
SAPH02Z080200002
B.
Check release
yoke fingers
SAPH02Z080200003
D.
Check splines on the
input shaft
SAPH02Z080200004

(4) Smooth area of input shaft
(5) Mating surfaces
NOTICE
Inspect the mating surfaces of both the transmission bell housing and
the flywheel housing. Any appreciable wear on either housing will
cause misalignment. Most wear will occur between the 3 and 8 o'clock
positions.
Replace housings if worn.
IMPORTANT POINT - MOUNTING
1. INSERT TWO (2) 3/8" x 16 UNC x 3" (76 MM) LONG GUIDE STUDS
INTO THE TWO UPPER MOUNTING HOLES OF THE FLYWHEEL.
2. INSTALL THE DISC BY INSERTING THE ALIGNING TOOL
THROUGH THE DISC SPLINES AND THEN INTO THE PILOT
BEARING.
SST: Clutch Aligning Arbor (S0966-21410)
NOTICE
Make sure the side marked "Pressure Plate Side" faces the pressure
plate.
3. WITH THE ALIGNING TOOL STILL IN PLACE, CAREFULLY SLIDE
THE CLUTCH ASSEMBLY OVER THE ALIGNING TOOL AND THE
TWO (2) GUIDE STUDS.
4. INSTALL LOCKWASHER AND SIX (6) 3/8" x 16 UNC MOUNTING
BOLTS HAND TIGHTEN.
(1) Remove the two (2) guide studs and replace with the remaining
mounting bolts with lockwasher. Using a torque wrench, progressively
tighten the eight (8) mounting bolts using the following crisis-cross
pattern. Starting at lower left.
Tightening Torque:
50-64 N˜m{510-665 kgf˜cm, 37-47 lbf˜ft}
! CAUTION
Failure to tighten these bolts in this manner can:
• Prevent the clutch cover from "centering" into the pilot area of
the flywheel.
• Cause permanent damage to the clutch cover (i.e. become
cracked or broken).
• Cause the clutch assembly to be out-of balance with the fly-
wheel.
E.
Check smooth
area of input
shaft for wear /
roughness
SAPH02Z080200005
1.
Insert 2 guide studs
Guide studs
SHTS02Z020200039
2.
Insert the aligning
tool through release
bearing sleeve
Aligning tool
SHTS02Z020200040
8
1
5
3
7
2
6
4
4.
Place disc on aligning
tool properly
orientated
SHTS02Z020200041

(2) Remove the four (4) gold colored shipping bolts in a criss-cross pat-
tern.
NOTICE
Save these four (4) bolts for future use in case you need to remove,
then reinstall the SOLO Clutch.
5. REMOVE THE ALIGNING TOOL.
6. SHIFT THE TRANSMISSION INTO GEAR.
7. POSITION THE TRANSMISSION SO THAT IT IS BOTH SQUARE
TO AND ALIGNED WITH THE ENGINE.
5.
Remove aligning tool
SHTS02Z020200042
6.
Shift transmission into gear
Shift into gear
SHTS02Z020200043
7.
Align the transmission
to the engine
SHTS02Z020200044

8. WHILE MOVING THE TRANSMISSION FORWARD, ROTATE THE
OUTPUT SHAFT OF THE TRANSMISSION UNTIL THE SPLINES
OF BOTH THE INPUT SHAFT AND THE DISC(S) MESH WITH
EACH OTHER. WHILE PERFORMING THIS TASK, YOU MUST
ALSO ENSURE THAT THE YOKE FINGERS REMAIN IN THE UP
POSITION UNTIL THEY CAN BE ROTATED OVER THE RELEASE
BEARING HOUSING INTO THEIR FINAL POSITION.
! CAUTION
• Do not use the cross-shaft release lever (or a pipe over it) to pull
the transmission into its final position. Doing so may release the
clutch and "overstroke" the release bearing. The SOLO will
incorrectly "set" the release bearing position too close to the
transmission and cause the wear indication tab to move to 1/3-1/
2 the distance towards the "REPLACE" position.
• Do not excessively force the transmission into the clutch assem-
bly or engine housing. If it does not enter freely, investigate the
cause of the problem and make any necessary changes.
• If the input shaft will not slide into the discs, they may need to be
repositioned. If the clutch is to be unbolted from the flywheel, re-
install the shipping bolts and tighten one turn past contact with
the clutch. Now the installation shaft can be installed to reposi-
tion the discs and the clutch bolts re-torqued. Remove the ship-
ping bolts to clamp the discs.
• Do not let the transmission drop or hang unsupported in the
driven discs.
This can cause the discs to become distorted and the clutch will
not release.
9. INSTALL THE TRANSMISSION MOUNTING BOLTS AND TORQUE
TO THE PROPER SPECIFICATION.
Tightening Torque:
37.5-48.5 N˜m{382-494 kgf˜cm, 28-35 lbf˜ft}
8.
Mesh input shaft and
disc (s) by rotating
output shaft
SHTS02Z020200045

IMPORTANT POINT-SET-UP
1. ADJUST LINKAGE
(1) Remove the return spring.
(2) Loosen the lock nut and turn the push rod counterclockwise until the
release bearing contacts the release lever plate or release lever.
(3) Fully press the pedal up to 5 times to move the release bearing
slightly closer to the transmission and gain free-play in the cab.
2. ADJUST THE FREE TRAVEL
(1) Turn the push rod counterclockwise until the release bearing contacts
the release lever plate or release lever.
(2) Turn the push rod clockwise about 3 1/3 turns.
(3) Tighten the lock nut.
Master cylinder
Push rod
0
SHTS02Z020200046
Stroke
pedal
5 times
SHTS02Z020200047
Master cylinder
Push rod
0
SHTS02Z020200046
Lock nut
3.18
SHTS02Z020200048
Standard: Clearance between release bearing and
release yoke: 3.18 mm {0.125 in.}

2013 hino 238 series truck service repair manual

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