1 INDEX

Models FA and FB REAR AXLE 10-1

10-81E-14

CHAPTER 10
REAR AXLE
Models FA and FB

TROUBLESHOOTING ...............................................................10 - 2
10
SPECIAL TOOL .........................................................................10 - 3

WHEEL HUB AND RELATED PARTS ......................................10 - 4

DISASSEMBLY ................................................................10 - 5
INSPECTION ....................................................................10 - 8
ASSEMBLY AND DISASSEMBLY ...................................10 - 11

DIFFERENTIAL CARRIER ........................................................10 - 15

HINO SH13-2 series
Single speed
Single reduction
 1 page 1
10-2 REAR AXLE Models FA and FB

TROUBLESHOOTING

Symptom Possible cause Remedy

Abnormal noise Bearing system

● Worn or damaged pinion bearings ................ Replace bearings
● Worn or damaged differential
side bearings ................................................. Replace bearings
● Loose pinion bearings ................................... Adjust bearing preload
● Loose differential side bearings .................... Adjust bearing preload

Gear system
● Inadequate backlash on ring gear
and pinion gear ............................................. Adjust backlash
● Worn thrust washers ..................................... Replace
● Worn differential spider ................................. Replace
● Worn or damaged ring gear and pinion ........ Replace
● Worn or damaged differential side gears
and pinions .................................................... Replace
● Loose ring gear tightening bolts .................... Tighten bolts
● Inadequate tooth contact of ring gear and
pinion gear .................................................... Replace or adjust tooth contact
● Worn pinion spIine ........................................ Replace

Rear axle system

● Worn rear axle shaft spline ........................... Replace
● Worn hub bearings ........................................ Replace
● Loose hub bearings ...................................... Adjust bearing preload
● Loose differential case tightening bolts ......... Tighten bolts

Oil system, etc.

● Insufficient oil ................................................ Add
● Poor oil quality .............................................. Change
● Abnormal noise of propeller shaft ................. Refer to CHAPTER 9
PROPELLER SHAFT
 1 page 1
Models FA and FB REAR AXLE 10-3

SPECIAL TOOL
Prior to starting a rear axle overhaul, it is necessary to have those special tools.

Illustration Tool No. Tool name

09650 - 2050 WHEEL HUB PULLER

09839 - 9401 HUB NUT WRENCH

09650 - 2090 HUB BEARING PULLER

09665 - 1150 ADJUSTER TOOL

09839 - 4104 SOCKET WRENCH

09849 - 1601
HANDLE
09849 - 2001

09640 - 1022 PINION DEPTH GAUGE

 1 page 1
10-4 REAR AXLE Models FA and FB

WHEEL HUB AND RELATED PARTS

1
2
3
9 4
10

3
5
19 6
7
1
14 8
11
15
12
16 13

16
15
17

18
SM10-543A

1. Oil seal 10. Oil deflector

2. Collar 11. Hub bolt
3. Taper roller bearing 12. Wheel nut inner
4. Hub 13. Wheel nut outer
5. Lock washer 14. Air breather
6. Lock nut 15. Plug
7. Lock plate 16. Washer
8. Axle shaft 17. Rear axle housing assembly
9. Hub bolt nut 18. Differential carrier assembly
19. ABS sensor ring
Fig. 1
 1 page 1
Models FA and FB REAR AXLE 10-5

DISASSEMBLY
1. REMOVAL OF WHEELS

NOTE: Be sure to apply wheel stoppers in the front

and rear of the front tires.

SM10-488
Fig. 2
1. Using a socket wrench, loosen the rear wheel nuts
a little.

NOTE ● Do not remove the wheel nuts but leave

them loosened.
● Hub bolts and wheel nuts on the right side
of the vehicle have right-hand threads,
and those on the left side of the vehicle
SM10-545 have left-hand threads.
Fig. 3
2. Jack up the rear axle, and support the frame with
stands.

WARNING
● When jacking up the rear axle, place a jack cor-
rectly to the axle, and then lift up the axle.
● Do not get under the vehicle when it is supported
by a jack only. It is very dangerous as the jack
SM10-346
might slip.
Fig. 4
● Use safety stands which have sufficient strength
and stability to support the vehicle whenever you
need to work under it.

3. Remove the wheel nuts and remove the wheel from

the wheel hub and do the same for both outer and
inner wheel.

NOTE: ● In the case of dual rear wheel removal,

first remove the outer wheel nuts and the
outer wheel. Then remove the inner wheel
nuts and the inner wheel.
SM10-545 ● Do not damage the threads of the hub bolts.
Fig. 5
 1 page 1
10-6 REAR AXLE Models FA and FB

2. DISASSEMBLY OF WHEEL HUB AND RELATED PARTS

1. Remove the brake drum set bolts, and then remove
the drum from the wheel hub.

SM10-524
Fig. 6

WARNING
● Do not work on brake drum while it is still hot,
this can result in personal injury.
● The drums are heavy. The rear drum weighs 30
kg (66 Ib). Be careful not to drop them.
● To assure safety, do this operation with more
than two persons.

2. Loosen and remove the bolts, and then remove the

axle shaft.

SM10-546
Fig. 7
3. Remove the oil seal, and then loosen the bolts and
remove the lock plate.

SM10-547
Fig. 8
4. Remove the taper roller bearing lock nut using a
special tool, and then remove the lock washer.

Special Tool: Hub nut wrench (09839 - 9401)

SM10-548
Fig. 9
 1 page 1
Models FA and FB REAR AXLE 10-7

5. Using a special tool, remove the wheel hub with the

outer taper roller bearing from the axle housing.
Special Tool: Wheel hub puller (09650 - 2050)
WARNING
● The wheel hub assembly is heavy. The rear wheel
hub assembly weighs 20 kg (44 Ib). Be careful
not to drop it.
● To assure safety, do this operation with more
SM10-549
than two persons.
Fig. 10
6. Using a special tool, remove the inner taper roller
bearing with oil seal collar from the axle housing.

Special Tool: Hub bearing puller (09650 - 2090)

Handle (09849 - 2001) or (09849 - 1601)

SM10-349
Fig. 11
7. Remove the ABS wheel sensor.
After removing the harness connector for the ABS
wheel sensor and the cable clip, remove the ABS
wheel sensor with its holder.
NOTE: Subjecting the wheel sensor to a strong
shock can cause internal damage. Do not
strike the wheel sensor with a hammer or
bump it against other components.

Fig. 12
8. Remove the wheel brake.
Disconnect the brake line, loosen the attaching bolt,
and remove the wheel brake assembly from the axle
housing.

SM10-500
Fig. 13
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10-8 REAR AXLE Models FA and FB

INSPECTION
1. INSPECTION OF THE WHEEL HUB
1. Inspect the taper roller bearing with race for burns
or pitting, and replace it if such defects are found.

SM10-501
Fig. 14
2. Inspect the taper roller bearing race for burns, cracks,
or brinelling on the raceways, and replace it if such
defects are seen.

NOTE: The bearing and the bearing race must be re-

placed as a set.

SM10-550
Fig. 15
3. Replacement of taper roller bearing race.
a. Remove the taper roller bearing race from the hub
bore.

SM10-551
Fig. 16
b. Install the new taper roller bearing race in the hub
bore.

SM10-552
Fig. 17
4. Inspect the hub bolts.
Replace the bolts if the threads of the bolts are worn
or damaged.

SM10-553
Fig. 18
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Models FA and FB REAR AXLE 10-9

5. Replacement of hub bolt.

a. Loosen the hub bolt nuts and remove the hub bolts
from the wheel hub.

SM10-506
Fig. 19
b. Install the new hub bolts in place on the wheel hub.

NOTE: The left and right hub bolts differ, so install

them according to the chart below.
Marks on the end Color
A
RIGHT R gold
LEFT L silver

SM10-507 SM10-508
Tightening Torque : 4,000 - 4,800 kg·cm
Fig. 20
(290 - 347 lb·ft)
A : Stake

NOTE: Stake the lock nuts at the two points after

tightened to the specified torque.

6. Inspect the oil seal collar for wear.

If the collar is excessively worn at the point of con-
tact with the lip of the oil seal, replace it.

SM10-509
Fig. 21
7. Inspect the axle shaft spline for wear or damage.
If the spline is excessively worn or damaged, replace
the shaft.

SM10-510
Fig. 22
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10-10 REAR AXLE Models FA and FB

8. Inspect the axle tube.

If the tube is abnormally worn or damaged at the point
of contact with the lip of the oil seal, replace the axle
housing.

SM10-511
Fig. 23
9. Sensor ring
• Visually inspect for any damage or deformation of
the sensor ring or protrusion from the wheel hub, etc.
• If there is any damage or deformation, replace the
sensor ring.
• If the sensor ring is protruding from the wheel hub,
push it in using a press board.

Fig. 24
a. Removal of the sensor ring
Uniformly tap on the periphery of the sensor ring
using a screw driver or the like and remove it slowly.
NOTE: When tapping and removing the sensor ring,
be careful not to damage the wheel hub.

Fig. 25

PRESS BOARD
b. Installation of the sensor ring
SENSOR RING
1) Set the sensor ring in the wheel hub and uniformly
GAP
push equally using a press board.
NOTE: Warming up the sensor ring with warm water
before pushing it in enables the procedure
to be carried out smoothly. Never use a gas
ADHESION
burner. Doing so can cause the sensor ring
to be deformed.
2) After pushing it in, check the axle direction wobble
Fig. 26
of the sensor ring.
Standard range: Under 0.2 mm (0.0079 in.)

10. Clamp bushing

1. Check that the wheel sensor is firmly secured.
2. If the wheel sensor can be pulled out or pushed in
easily, replace the clamp bushing.

Fig. 27
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Models FA and FB REAR AXLE 10-11

ASSEMBLY AND ADJUSTMENT

1. ASSEMBLY AND ADJUSTMENT OF THE WHEEL HUB
1. Apply wheel bearing grease to the taper roller bearing.

Wheel bearing grease:

Refer to RECOMMENDED LUBRICANTS LIST.

SM10-512
Fig. 28
2. Install the wheel brake assembly to the axle-hous-
ing.
NOTE: ● Refer to CHAPTER 13, SERVICE BRAKE.
● The installation of the ABS wheel sensor
is not proceeded.

Tightening Torque: 1,500 - 2,000 kg·cm

(109 - 144 lb·ft)
SM10-351
Fig. 29
3. Install the oil seal collar and inner taper roller bear-
ing on the axle housing.
Using a pipe, as shown in Fig. 30, makes the work
easier.

WARNING
When hammering, a metal tip may fly off on impact.
Wear safety glasses to protect your eyes.
SM10-513
NOTE: This procedure must be performed after the
Fig. 30
ABS wheel sensor has been removed.
5. Install the ABS wheel sensor.
After applying a thin film of chassis grease to the
wheel sensor body, press the wheel sensor into the
clamp bushing (holder) until the tip of the wheel sen-
sor and the side surface of the holder become flat
and install the holder on the base portion of the axle
tube and tighten with the specified torque.
Tightening torque: 351 - 527 kg.cm (26 - 38 lb·ft)
Fig. 31
NOTE: ● The bolts should be tightened by hand.
Never use an impact wrench.
● In this condition, the wheel sensor is still
temporarily installed and should be fi-
nally installed after the pre-load adjust-
ment of the wheel hub assembly.
 1 page 1
10-12 REAR AXLE Models FA and FB

4. Apply wheel bearing grease to the wheel hub.

Wheel bearing grease:

Refer to RECOMMENDED LUBRICANTS LIST.

Capacity: 420 grams (15 oz) per wheel.

SM10-554
Fig. 32
5. Install the wheel hub and taper roller bearing (outer)
on the axle housing.
Using a pipe, as shown in Fig. 33, makes the work
easier.

WARNING
● The wheel hub assembly is heavy. The wheel hub
assembly weighs 20 kg (44 Ib). Be careful not
SM10-555 to drop it.
Fig. 33 ● To assure safety, do this operation with more
than two persons.
● When hammering, a metal tip may fly off on im-
pact. Wear safety glasses to protect your eyes.

6. Install the lock washer and lock nut.

Tighten the nut to the specified torque using a spe-
cial tool while turning the wheel hub.

Special Tool: Hub nut wrench (09839 - 9401)

Tightening Torque: 5,000 - 6,000 kg·cm
(362 - 433 lb·ft)

SM10-556
Fig. 34
7. Loosen the lock nut by 1/4 to 1/3 turn using a spe-
cial tool. Then strike the wheel hub with a copper
hammer.

Special Tool: Hub nut wrench (09839 - 9401)

WARNING
When striking, a metal tip may fly off on impact.
Wear safety glasses to protect your eyes.
SM-10-548 SM10-557
Fig. 35
 1 page 1
Models FA and FB REAR AXLE 10-13

8. Measure the wheel bearing preload.

Adjust the preload with the lock nut, if it exceeds or
is less than specifications.

Turning Torque: 40 - 60 kg·cm (2.9 - 4.3 lb·ft)

Standard Preload: 3.6 - 5.4 kg (8.0 - 11.9 lb)

SM10-598
Fig. 36
9. Apply the lock plate and align it with the small screw
hole of the nut. If the hole does not align, turn over
the plate. If alignment is still unattainable, turn the
lock nut further within the limits of hub turning torque
of 40 - 60 kg·cm (2.9 - 4.3 lb·ft)

Tightening Torque: 85 - 110 kg·cm (6.2 - 7.9 lb·ft)

SM10-558
Fig. 37
10. Install the oil seal on the wheel hub.

SM10-559
Fig. 38
11. Install the axle shaft in the wheel hub and tighten
the set bolts to the specified torque.

Tightening Torque: 870 - 1,100 kg·cm (63 - 79 lb·ft)

SM10-560
Fig. 39
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10-14 REAR AXLE Models FA and FB

10. Positioning the ABS wheel sensor

a. Temporarily remove the brake lining of the wheel
sensor installation side.
b. Fully depress the wheel sensor until it makes con-
tact with the wheel sensor ring.
c. Restore the brake lining.
NOTE: Refer to Chapter 13, SERVICE BRAKE.

Fig. 40

WHEEL
MAKE CONTACT SENSOR

SENSOR
RING

HUB

CLAMP
BUSHING
Fig. 41

12. Install the brake drum on the wheel hub and tighten
the drum set bolts.

Tightening Torque: 200 - 400 kg·cm (15 - 28 lb·ft)

WARNING
● The drums are heavy. The rear drum weighs 30
kg (66 Ib). Be careful not to drop them.
● To assure safety, do this operation with more
Fig. 42 than two persons.
 1 page 1
Models FA and FB REAR AXLE 10-15

13. Install the inner wheel on the wheel hub.

Before installation, clean the mounting surface of the
disc wheel and the wheel hub, and the hub bolts and
nuts. A loose wheel mounting can result from these
parts not being cleaned. Check the hub bolts and
nuts for wear of the threads or damage and the wheel
disc for any cracks or bends. Replace the part if you
find any of these conditions.
a. With the hub bolts aligned with the holes of the wheel,
SM10-562
lift the wheel up with a tire lever and mount it over
Fig. 43
the hub bolts.
b. Rotating the wheel, install the inner wheel nuts and
tighten manually. Make sure that the hub bolts are
centered in the holes.
NOTE: ● Do not damage the threads of the hub
bolts.
● Wheel hub bolts and nuts on the right side
of the vehicle have right-hand threads,
and those on the left side of the vehicle
have left-hand threads.

WARNING
The specified torque should be observed for tight-
ening wheel nuts. Improperly torqued wheel nuts
can cause the wheel to come off while driving. This
can result in personal injury and/or property dam-
age due to loss of vehicle control.
When the vehicle, wheels or wheel nuts are new,
the wheel nuts should be checked and tightened to
specified torque at 100, 500, and 1,000 miles since
they are not well seated. The tightening torque
should be checked with a proper torque wrench.

14. Tighten the inner wheel nuts to the specified torque

using a wheel nut wrench.

Tightening Torque: 4,000 - 4,800 kg·cm

(290 - 347 Ib·ft)
NOTE: Wheel hub bolts and nuts on the right side
of the vehicle have right-hand threads, and
those on the left side of the vehicle have left-
SM10-352 hand threads.
Fig. 44
 1 page 1
10-16 REAR AXLE Models FA and FB

NOTE: ● The proper tightening sequence is shown

in Fig. 43. Go through the sequence sev-
eral times, gradually and evenly increas-
ing the torque on each nut each time un-
til the specified torque is reached.
● When tightening the nuts, apply grease or
engine oil to the threads of the studs and
nuts.
SM10-544
Fig. 45
15. Install the outer wheel on the wheel hub.
Installation procedures for outer wheels are the same
as in 13 through 14 above.

Tightening torque: 4,000 - 4,800 kg·cm

(290 - 347 lb·ft)
NOTE: Install dual rear wheels with their valve stems
positioned 180 degrees apart to facilitate in-
SM10-563
flation.
Fig. 46
2. BRAKE SYSTEM AIR BLEEDING AND BRAKE SHOE
CLEARANCE ADJUSTMENT.
1. On completion of the wheel hub and related parts
reassembly, conduct the following.
a. Bleed the air from the brake lines according to sec-
tion FINAL CHECK AND ADJUSTMENT in chapter
SERVlCE BRAKE.
b. Adjust the brake shoe clearance according to sec-
tion INSPECTION AND ADJUSTMENT in chapter
SERVICE BRAKE.
 1 page 1
Models FA and FB REAR AXLE 10-17

DIFFERENTIAL CARRIER
(HINO SH13-2 series)

13
5
14 15
7 21
6 16 18
17
19 22
5
4 20
3
2
1

24

10 23 15
12 5
9 11 13

5
SM10-492A
8

1. Flange lock nut 13. Adjust nut

2. Flange yoke coupling 14. Side spacer (Gear ratio 3.636 only)
3. Dust deflector 15. Differential case
4. Oil seal 16. Side gear thrust washer
5. Taper roller bearing 17. Side gear
6. Bearing cage 18. Pinion thrust washer
7. Shim 19. Pinion
8. Spacer 20. Spider
9. Drive pinion 21. Bearing cap
10. Cylindrical roller bearing 22. Lock plate
11. Differential carrier case 23. Ring gear
12. Name plate 24. Bolt

Fig. 1
 1 page 1
10-18 REAR AXLE Models FA and FB

REMOVAL
1. REMOVAL OF DIFFERENTIAL CARRIER

NOTE: Be sure to apply wheel stoppers in the front

and rear of the front tires.

SM10-488
Fig. 2
1. Disconnect the propeller shaft from the flange at the
differential carrier.

NOTE: Draw the aligning marks on the flange and

yoke before disassembling.

SM10-595A
Fig. 3
2. Remove the filler and the drain plug to drain the gear
oil from the axle housing.

WARNING
Do not work on differential carrier while it is still
hot.
This can result in personal injury.

SM10-422
Fig. 4
3. Remove the bolts, and then pull the axle shafts out.

SM10-489
Fig. 5
4. Use a jack to dismount the differential carrier assem-
bly from the axle housing.

WARNING
● When loosening the tightening bolts of the dif-
ferential carrier, do not place yourself under the
differential carrier.
● Be sure to apply a support before dismounting
SM10-565A
the differential carrier assembly.
Fig. 6
 1 page 1
Models FA and FB REAR AXLE 10-19

DISASSEMBLY
1. DISASSEMBLY OF THE DIFFERENTIAL CARRIER
1. Mount the differential carrier assembly on a work
stand.

SM10-425B
Fig. 7
2. Loosen the bolts, then remove the bearing cap from
the differential carrier.

NOTE: First apply match marks to the cap and car-

rier.

SM10-426A
Fig. 8
3. Remove the differential case assembly from the car-
rier.

SM10-567A
Fig. 9
4. Remove the taper roller bearings at both ends of the
differential case and the side spacer located on the
right side of the differential case for gear ratio 3.636
only, by using a puller.
NOTE: ● Do not change the combination of the
assembled taper roller bearing and its
race.
● Always replace the bearings with their
SM10-568 original races.
Fig. 10
5. Loosen the nuts and remove the ring gear from the
differential case.

NOTE: Be careful not to drop the ring gear from the

differential case.

SM10-569
Fig. 11
 1 page 1
10-20 REAR AXLE Models FA and FB

6. Disassemble the differential case.

NOTE: Be sure to check the aligning marks on the

differential case before disassembly. Re-
move the bolts so that the case separates.

SM10-570 SM10-453

Fig. 12
7. Component parts of the differential case assembly.

FOR GEAR RATIO 3.636 ONLY

SM10-431A
Fig. 13
8. Loosen the bolts and remove the pinion assembly,
and then remove the cylindrical roller bearing from
the differential carrier.

SM10-572A SM10-433
Fig. 14
9. Remove the lock nut using a special tool.
Spread the staking of the nut completely with a chisel,
then loosen the nut.
NOTE: Insufficient spread of the staked parts will
cause damage to the threads of the drive pin-
ion when loosening the nut.
Special Tool: Socket wrench (09839 - 4104)

SM10-434A SM10-435A
Fig. 15
10. Separate the bearing cage and the pinion gear with
a press.

SM10-573
Fig. 16
 1 page 1
Models FA and FB REAR AXLE 10-21

11. Remove the taper roller bearing from the pinion gear
using a puller.

SM10-574
Fig. 17
12. Remove the retainer ring and then pull out the inner
race for cylindrical roller bearing from the pinion gear
using a puller.

WARNING
The retainer ring is spring steel and may pop out.
Wear safety glasses to protect your eyes.
SM10-438 SM10-439
Fig. 18
13. Remove the oil seal and the taper roller bearing outer
races from the cage.

NOTE: At the same time that the bearing is drawn

out, the oil seal comes out. Be careful not to
deform the oil seal.

SM10-440
Fig. 19
14. Component parts of the pinion assembly.

SM10-599
Fig. 20

INSPECTION
1. INSPECTION OF THE DIFFERENTIAL CARRIER
1. Check the flange coupling spline for wear and dam-
age.
Replace the coupling if damaged or worn.

SM10-575
Fig. 21
 1 page 1
10-22 REAR AXLE Models FA and FB

2. Inspect the taper roller bearings, cylindrical roller

bearing and races for burns or pitting.
If such defects are found, replace it.

SM10-576 SM10-444
Fig. 22
3. Inspect the drive pinion and ring gear teeth surfaces
for wear, stripping or damage, and replace both parts
as a set when defects are found.
NOTE: The drive pinion and ring gear must be re-
placed as a set, not individually, because they
are fitted to each other by lapping during
manufacture.
Replacement of only one part does not pro-
SM10-445 duce proper tooth contact, and gear strength
Fig. 23 drops excessively.
4. Inspect the spider holes and surfaces of the differ-
ential case that come in contact with the thrust wash-
ers for wear or damage. Replace the case, if dam-
aged or worn.

SM10-577
Fig. 24
5. Inspect the pinion for wear or damage and check the
amount of wear of the bore with a cylinder gauge.

SM10-447
Fig. 25
6. Inspect the spider for damage, and check the amount
of wear by measuring its journals with a micrometer
to determine the spider to pinion clearance.
When the clearance is beyond the service limit, re-
place it.

Standard clearance: 0.141 - 0.181 mm

(0.0056 - 0.0071 in.)
SM10-448 Service limit: 0.4 mm (0.016 in.)
Fig. 26
 1 page 1
Models FA and FB REAR AXLE 10-23

7. Measure the thickness of the thrust washers on the

pinion and side gears. Replace any washer worn
beyond the limit.

Standard Thickness:
Side gear 1.9 - 2.1 mm (0.075 - 0.082 in.)
Pinion gear 1.5 - 1.7 mm (0.060 - 0.066 in.)
Service Limit:
Side gear 1.7 mm (0.067 in.)
SM10-449 SM10-450 Pinion gear 1.3 mm (0.051 in.)
Fig. 27
8. Measure the pinion backlash by using a dial gauge
with a magnet base.
When the backlash is beyond the service limit, re-
place the pinion gear and/or side gear.

Assembly standard: 0.20 - 0.60 mm

(0.0079 - 0.0236 in.)
Service limit: 0.90 mm (0.0354 in.)
SM10-451
Fig. 28 Put the side gear in the differential case so that the
chamfering surface of the thrust washer is on the
gear side.

9. Measure the backlash of the side gear and pinion

A A A with the cogs of the pinion and side gear in the posi-
tion shown in Fig. 29.
A: Pinion
B: Side gear
B B B C: Thrust washer
C CORRECT INCORRECT

SM10-269B
Fig. 29
 1 page 1
10-24 REAR AXLE Models FA and FB

ASSEMBLY
1. ASSEMBLY AND ADJUSTMENT OF DIFFERENTIAL
CARRIER
1. Assemble the differential case.
NOTE: ● Align the aligning marks on cases.
● Apply the adhesive (Lock agent) which is
equivalent to THREE BOND: 1360K on
threads.
SM10-452 SM10-453
● Tighten the bolts to the specified torque.
Fig. 30
Tightening Torque: 2,500 - 3,000 kg·cm (181- 217 lb·ft)

2. Install the ring gear to the differential case.

NOTE: Apply the lock agent (Lock tight) which is

equivalent to THREE BOND: 1360K on bolt
threads.

SM10-578
Fig. 31
3. Tighten the nuts to the specified torque.

Tightening Torque: 2,500 - 3,000 kg·cm

(181 - 217 lb·ft)

SM10-455
Fig. 32
4. Install the side spacer to the right side of the differ-
ential case (For gear ratio 3.636 only).
Install the two tapper roller bearings, one to each end
of the differential case, using a press.

SM10-597A
Fig. 33
 1 page 1
Models FA and FB REAR AXLE 10-25

5. Install the cylindrical roller bearing inner race using

a press and install the retainer ring on the end of the
drive pinion.

WARNING
The retainer ring is spring steel and may pop out.
Wear safety glasses to protect your eyes.

SM10-457 SM10-458
Fig. 34
6. Using a press, install the inner taper roller bearing
to the drive pinion.

SM10-579
Fig. 35
7. Using a press, install the taper roller bearing outer
races in the bearing cage.

SM10-580 SM10-581
Fig. 36
8. Put the spacer to drive pinion.

SM10-582A
Fig. 37
9. Using a press, assemble the bearing cage and ta-
per roller bearing on the drive pinion.

SM10-463
Fig. 38
 1 page 1
10-26 REAR AXLE Models FA and FB

10. Install the flange on the pinion shaft without oil seal,
and then tighten the flange lock nut to the specified
torque using a special tool.

Special Tool: Socket wrench (09839 - 4104)

Tightening Torque: 3,800 - 5,100 kg·cm
(275 - 368 lb·ft)

SM10-464A
Fig. 39
11. Measure the preload of the drive pinion bearings.
If the preload is out of the specified limits, adjust it
as follows.
Use a thinner spacer to increase and a thicker one
to decrease preload. When new bearings, use the
spacer of 14.175 mm (0.558 in.) at first and meas-
ure the preload. This will be helpful to select the
spacer for specified preload.
SM10-465A Tighten the flange lock nut to the specified torque
Fig. 40 before re-checking.
a. Using a torque wrench.

New bearing Re-used bearing

Turning torque 20 - 30 kg·cm (1.5 - 2.1 lb.ft) 15 - 25 kg·cm (1.1 - 1.8 lb·ft)
Adjusting spacer thickness 20 differences in thickness from 13.900 to 14.375 mm (0.5473 to 0.5659 in.)
each differing by 0.025 mm (0.001 in.)

b. Using a spring balancer.

Turning force: Unit: kg (lb)

New bearing 3.2 - 4.8 (7.1 - 10.5)
Re-used bearing 2.4 - 4.0 (5.3 - 8.8)

SM10-116
Fig. 41
12. When the preload is correct, remove the flange and
then install the new oil seal, flange and flange lock
nut.
Tighten the flange lock nut to the specified torque.

NOTE: Apply wheel bearing grease to the oil seal lip.

Wheel bearing grease:
Refer to RECOMMENDED LUBRICANTS LIST.
SM10-487 SM10-466 Special Tool: Socket wrench (09839 - 4104)
Fig. 42 Tightening Torque: 3,800 - 5,100 kg·cm (275 - 368 lb·ft)
 1 page 1
Models FA and FB REAR AXLE 10-27

13. Lock the flange lock nut by staking the lip into the
pinion shaft slots.

NOTE: ● More than 1.5 mm (0.059 in.).

● Stake portion should be fitted in the
1.5 mm groove thoroughly.
● Staking should be done without rift.
10 mm
Measure the bearing preload (see preceding page)
SM10-467A SM10-494 and record it for TOTAL BEARING PRELOAD MEAS-
Fig. 43 UREMENT described in step 24 on page 10-30.
14. Install the pinion assembly and the cylindrical roller
bearing on the differential carrier.

NOTE: ● At this point, align the oil leading hole.

● Oil leading hole position is upperside at
carrier mount position.

SM10-583B
Fig. 44
15. Measure the drive pinion fitting height (conical dis-
tance) by using the pinion depth gauge.
If the pinion fitting height is out of the specified value,
adjust it with shim.
Use a thinner shim to decrease and a thicker shim
to increase the pinion fitting height.

Nominal Pinion Fitting Height “A”: 21.5 mm (0.846 in.)

SM10-469 Special Tool: Pinion depth gauge (09640-1022)
Fig. 45

a. Pinion depth gauge setting method

Set the pinion depth gauge onto the master bed,
confirm the dimensions B, C, and D, and then set
the dial gauge to “0”.
D
C B Dimension B = Nominal pinion fitting height “A”
B C D
MASTER BED
21.5 mm 27.7 mm 20.3 mm
Height
SM10-059 (0.846 in.) (1.091 in.) (0.799 in.)
Fig. 46
b. Use method for the pinion depth gauge
E
Set the pinion depth gauge as shown in the figure
on the left, and read the value of the dial gauge.
A
A : Measuring pinion-fitting height value
E : Engraved value for gear toothing adjustment
F : Adjusting shims

F
SM10-059
Fig. 47
 1 page 1
10-28 REAR AXLE Models FA and FB

Example: When the engraved value at the surface of the

pinion gear is –2 (–2 means –0.2 mm).
Use shims to adjust so that the dial gauge
reading becomes –0.2 mm.
(A minus (–) reading of the dial gauge means
that the tip of the dial gauge is pulled in.)
Adjusting Shims Thickness: 0.3 mm (0.0118 in.),
0.4 mm (0.0157 in.), 0.45 mm (0.0177 in.),
SM10-470 0.5 mm (0.0197 in.).
Fig. 48
16. Tighten the differential carrier cage bolts to the speci-
fied torque.
NOTE: Apply the sealing compound which is equiva-
lent to THREE BOND No. 1215 to the fitting
faces of the carrier and the cage.
Tightening Torque: 650 - 870 kg·cm (47 - 62 lb·ft)

SM10-584A
Fig. 49
17. Install and tighten the bearing lock washers with bolt
and nut, and then stake the lock nut as shown.

Tightening Torque : 190 - 260 kg·cm (14 - 18 lb·ft)

A
A : Stake

SM10-472 SM10-493
Fig. 50
18. Mount the differential case assembly on the differ-
ential carrier.

SM10-567A
Fig. 51
19. Install the adjusting nut and bearing cap on the dif-
ferential carrier and tighten the cap temporarily with
bolts.

NOTE: Align the match marks of the cap and the dif-
ferential carrier.

SM10-585
Fig. 52
 1 page 1
Models FA and FB REAR AXLE 10-29

20. Adjust the preload of the side bearing by using a

special tool.
1) Tighten the adjusting nut on the back side of the ring
gear fully, and then loosen it by 1/4 turn + 1 notch.
2) Do the same with the adjusting nut on the ring side.

Special Tool: Adjuster tool (09665 - 1150)

SM10-586 SM10-587
Fig. 53
21. Strike the bearing cap with a copper hammer.

SM10-588
Fig. 54
22. Measure the gear backlash at four points using a dial
gauge with a magnet stand. If the measured value
is out of specified value, adjust the gear backlash by
turning the adjusting nuts, loosening one side one
notch and tightening the other side one notch.

Assembly Standard: 0.25 - 0.33 mm (0.0099 - 0.0130 in.)

Decrease
Increase
Special Tool: Adjuster tool (09665 - 1150)
SM10-589 SM10-540
Fig. 55
23. Inspection of gear tooth contact
a. Satisfactory gear tooth contact
a) The length of the tooth contact area in the direction
of the tooth trace should be more than half the length
of L, and the tooth contact area should be at the toe
side.
b) Tooth pressure should be distributed evenly over the
contact area of the tooth.
SM10-72A
Fig. 56
NOTE: On new gears there is a blade-applying mark
from lapping. Adjust the contact area to align
with this mark.

SM10-478A
Fig. 57
 1 page 1
10-30 REAR AXLE Models FA and FB

b. Samples of unsatisfactory engagement.

A B a) Toe and Flank contact.

A: Replace (Toe contact)

B: Adjust (Flank contact)

SM10-072B
Fig. 58
b) Heel and face contact.
A B
A: Replace (Heel contact)

B: Adjust (Face contact)

SM10-072C
Fig. 59
24. Measure the total preload of the differential carrier
bearings.
NOTE: Total preload = Pinion bearing preload (Meas-
ured in step 13. on page 10 - 27) + Side bear-
ing preload (Refer to tables below).
If the preload is out of the specified limits, adjust it
with the adjusting nuts of the side bearings.
Tighten both side adjusting nuts evenly to increase
SM10-590A and loosen them to decrease preload and re-inspect
Fig. 60 the gear tooth contact.
Special Tool: Adjuster tool (09665 - 1150)
1. Using a torque wrench.

Turning torque: Unit: kg·cm (lb.ft)

Gear ratio 3.363 3.636
New 6.0 - 8.9 5.5 - 8.2
bearing (0.43 - 0.64) (0.40 - 0.59)
Re-used 4.5 - 7.4 4.2 - 6.8
bearing (0.33 - 0.53) (0.30 - 0.49)

2. Using a spring balancer.

Turning force: Unit: kg (lb)

øA Gear ratio 3.363 3.636
New 0.96 - 1.42 0.88 - 1.32
125 mm bearing (2.10 - 3.14) (1.94 - 2.91)
(4.92 in.) Re-used 0.72 - 1.19 0.66 - 1.10
bearing (1.58 - 2.62) (1.46 - 2.42)
SM10-591A
Fig. 61
 1 page 1
Models FA and FB REAR AXLE 10-31

25. Tighten the bearing cap bolts to the specified torque.

NOTE: Lock the nuts with lock plate.

Tightening Torque: 2,000 - 2,300 kg·cm

(145 - 166 lb·ft)

SM10-592
Fig. 62
26. Install the lock plate.

Tightening Torque: 190 - 260 kg·cm (14 - 18 lb·ft)

SM10-593
Fig. 63

4 mm (0.16 in.) INSTALLATION

3 mm (0.12 in.) 1. INSTALLATION OF THE DIFFERENTIAL CARRIER
1. Install the differential carrier assembly.
NOTE: 1. Apply the sealing compound to the face
of the housing flange.
a. The trace of the sealing compound should
be continuous.
4 mm (0.16 in.) 3 mm (0.12 in.)
b. Application should be approximately 3
SM10-131
mm (0.12 in.) width and 4 mm (0.16 in.)
Fig. 64
away from the edge.
c. The sealing compound should be equiva-
lent to THREE BOND#1215.
NOTE: Be careful not to install the differential car-
rier upside down. Install the differential car-
rier so that the ring gear teeth face to the right
side of the vehicle. Otherwise the vehicle will
move backward while the transmission is
shifted into forward gear.
SM10-594A
Fig. 65
Tightening Torque:
M12: 870 - 1,100 kg·cm (63 - 79 lb·ft)
M14: 1,100 - 1,500 kg·cm (80 - 108 lb·ft)
 1 page 1
10-32 REAR AXLE Models FA and FB

2. INSTALL THE PROPELLER SHAFT TO DIFFERENTIAL

CARRIER FLANGE.
1. Align the match marks on the flange and yoke.
2. When a propeller shaft yoke is secured by four bolts,
bolt heads must face differential carrier.
3. Tighten the bolts to specified torque.
Tightening Torque: 650 - 870 kg·cm (47 - 62 lb·ft)

SM10-595A
Fig. 66
3. INSTALL THE AXLE SHAFT.

Tightening Torque: 870 - 1,100 kg·cm (63 - 79 lb·ft)

SM10-596
Fig. 67
4. FILL THE DIFFERENTIAL WITH GEAR OIL.

NOTE: Refer to the RECOMMENDED LUBRICANT

LIST.

Oil Capacity: Approx. 3.7 L (3.91 U.S.Qt./3.25 lmp.Qt.)

SM10-486
Fig. 68