Isuzu N-Series. Manual - part 150

SERVICE INFORMATION 00-1

PROPELLER SHAFT AND AXLE

SECTION 00

SERVICE INFORMATION

Contents

TROUBLESHOOTING .......................................... 00-2

Propeller Shaft................................................... 00-2
Rear Axle and Front Driving Axle ...................... 00-2

MAIN DATA AND SPECIFICATIONS ................... 00-3
SERVICE STANDARD.......................................... 00-6
SERVICING .......................................................... 00-8
FIXING TORQUE.................................................. 00-9

Propeller Shaft................................................... 00-9
Front Hub and Brake Drum (4 

× 2 Model) ....... 00-10

Front Hub and Disc (4 

× 2 Model) ................... 00-11

Front Axle, Knuckle and King Pin (4 

× 2 Model).. 00-12

Front Hub, Brake Drum Spindle, Drive Shaft, Knuckle 
and King Pin (4 

× 4 Model) .............................. 00-13

Front Differential Assembly ............................. 00-14
Rear Hub, Brake Drum and Axle Shaft (NHR Single 
Tire Model) ...................................................... 00-16
Rear Hub, Brake Drum and Axle Shaft (NKR Single 
Tire Model; Full Floating)................................. 00-17
Rear Hub, Brake Drum and Axle Shaft (NHR Dual 
Small Tire, NKR Dual Tire, NPR, NQR, NPS Models; 
Full Floating).................................................... 00-18
Rear Differential Assembly (244 mm).............. 00-19
Rear Differential Assembly (292/320 mm)....... 00-20

SPECIAL TOOLS................................................ 00-21

Propeller Shaft................................................. 00-21
Rear Axle......................................................... 00-21
Front Axle ........................................................ 00-24

00-2 SERVICE INFORMATION

TROUBLESHOOTING

Propeller Shaft

Rear Axle and Front Driving Axle

PROBLEM

POSSIBLE CAUSE

CORRECTION

Noises from Propeller 
Shaft

1. Worn spline yoke.

1. Replace the spline yoke.

2. Worn or stuck spider bearing.

2. Replace the center bearing.

3. Worn center bearing.

3. Replace the center bearing.

Vibration from Propel-
ler Shaft

1. Incorrect shaft run-out.

1. Replace the propeller shaft.

2. Out of shaft balance.

2. Adjust the shaft balance.

3. Stuck spline yoke.

3. Replace the spline yoke.

PROBLEM

POSSIBLE CAUSE

CORRECTION

Oil Leak at Front Axle 
or Rear Axle

1. Worn or defective oil seal.

1. Replace the oil seal.

2. Axle housing cracked.

2. Repair or replace.

Oil Leak at Pinion Shaft

1. Too much gear oil.

1. Correct the oil level.

2. Oil seal worn or defective.

2. Replace the oil seal.

3. Pinion flange loose or damaged.

3. Tighten or replace.

Noises in Front Axle or 
Rear Axle

1. Insufficient gear oil.

1. Replenish the gear oil.

2. Wrong or poor grade gear oil.

2. Replace the gear oil.

3. Drive pinion to ring gear backlash incor-

rect.

3. Adjust the backlash.

4. Worn or chipped ring gear, pinion gear 

or side gear.

4. Replace the ring gear, pinion gear or 

side gear

5. Pinion shaft bearing worn.

5. Replace the pinion shaft bearing.

6. Wheel bearing worn.

6. Replace the wheel bearing.

7. Differential bearing loose or worn.

7. Tighten or replace.

SERVICE INFORMATION 00-3

MAIN DATA AND SPECIFICATIONS

Propeller Shaft

Rear Axle

NHR55, 69

NKR55

NKR66, 71, 77

NPR66, 70, 71, 77

NQR66, 71, NPS71

NQR70, 75

NPR75

NPS75

Bearing retention method

Inside snap ring

Outside snap ring

Spider length

mm (in)

69 (2.72)

85 (3.35)

95 (3.74) <for Taiwan, 

Australia and GCC>

96 (3.780)

Spider outside dia.

mm (in)

18.46 (0.73)

21.94 (0.86)

23.02 

(0.9065)

Tube-outside dia.

diameter 

× thickness

mm (in)

68.9 

× 2.0

(2.71 

× 0.08)

82.6 

× 2.3

(3.25 

× 0.09)

90 

× 3.2 

(3.54 

× 0.13)

Flange bolt size

M10

M12

M12

Flange bolt P.C.D.

mm (in)

85 (3.35)

100 (3.94)

110 (4.33)

Vehicle series

NHR55, 69

NKR55, 69 (For general export; 

Turkey, Chile)

Single

Dual Small

Single

Dual Small (For 

Turkey)

Rear axle type

Banjo semi-float-

ing

Banjo full floating

Gear type

Hypoid

Number of differential pinion

4

Ring gear pitch diameter

mm (in)

244 (9.6)

Amount of hub grease 
(each wheel) 

g (oz)

80 (2.8)

285 (10.1)

280 (9.9)

285 (10.1)

Oil capacity

lit (US/

Imp qt)

2.7 (2.9/2.4)

00-4 SERVICE INFORMATION

(A): for 2003 year model except straight frame
(B): for 2003 year model and straight frame, except Colombia
(C): for 2003 year model, straight frame and Colombia

Vehicle series

NPR66, 

71 

(Singap

ore, 

Turkey) 

70 

(Taiwan, 

Chile), 

77

NPS71

NKR55, 

69, 71

NKR66

NKR77

Dual

Single

Dual

Single

Dual

Dual 

Small

Rear axle type

Banjo full floating

Gear type

Hypoid

Number of differential 
pinion

4

Ring gear 
pitch diameter

mm

(in)

292 (11.5)

Amount of 
hub grease 
(each wheel) 

g (oz)

285 (10.1)

Oil capacity

lit (US/

Imp qt)

3.0 (3.2/2.6)

Vehicle series

NPS75

NPR70 

(Hong Kong) 

71 

(Colombia), 

75

NQR66, 70, 71, 75

NKR71

Dual

Rear axle type

Banjo full floating

Gear type

Hypoid

Number of differential pinion

4

Ring gear pitch diameter

mm (in)

320 (12.5)

Amount of hub grease 
(each wheel) 

g (oz)

285 (10.1)

Oil capacity

lit (US/

Imp qt)

3.4 (3.6/3.0)

(A) 3.4 (3.6/3.0)
(B) 4.3 (4.5/3.8)
(C) 5.2 (5.5/4.6)