Isuzu N-Series. Manual — part 151

SERVICE INFORMATION 00-5

Front Axle

Specifications

NPS

Front axle type

Banjo full floating

Tread

1,665 (65.55)

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)

200 (7.1)

Oil capacity

lit (US/Imp qt)

2.7 (2.9/2.4)

00-6 SERVICE INFORMATION

SERVICE STANDARD

Items

Service Standard

Limit

PROPELLER SHAFT

NHR55,

69

NKR55

NKR66,

71, 77,

NPR70,

71 77,

NQR66,

71,

NPS71

NQR70,

75

NPR75
NPS75

NHR55,

69

NKR55

NKR66,

71, 77,

NPR 70,

71 77,

NQR66,

71,

NPS71

NQR70,

75

NPR75

NPS75

Outside Diameter of Spi-
der Pin

mm (in)

18.46

(0.73)

21.94

(0.86)

24.00

(1.001)

18.36

(0.72)

21.84

(0.8598)

23.90

(0.941)

Propeller Shaft Run-Out

mm (in)

0.5 (0.02) or less

0.3 (0.12)

or less

1.0 (0.039)

0.5(0.02)

Play between the Sleeve
Yoke and the Propeller
Shaft Spline

mm (in)

0.1 (0.0039)

0.3 (0.012)

Play in the Universal
Joint

mm (in)

0.1 (0.0039)

—

REAR AXLE SHAFT

Axle Shaft Run-Out

mm (in)

—

1.0 (0.039)

Axle Shaft Flange Run-
Out

mm (in)

—

0.05 (0.0097) <except 2003 year

model>

0.15 (0.006)

REAR DIFFERENTIAL

244 mm

292 mm

320 mm

244 mm

292 mm

320 mm

Pinion Bearing Preload

New Bearing

N (kg/lb)

16-29

(1.6-3.0/

3.5-6.6)

13-25

(1.3-2.6/

2.9-5.7)

26-38

(2.7-3.9/

6.0-8.6)

—

Used Bearing

N (kg/lb)

8-14.5

(0.8-1.5/

1.8-3.3)

6.5-12.5

(0.65-1.3/

1.5-2.9)

13-19

(1.35-

1.95/3.0-

4.3)

—

Pinion Bearing Starting Torque

New Bearing

N

⋅m (kg⋅cm/

lb

⋅in)

0.69-1.27

(7-13/6.1-

11.3)

0.98-1.96

(10-20/

8.7-17.4)

2.3-3.2
(23-33/

20-28.6)

—

Used Bearing

N

⋅m (kg⋅cm/

lb

⋅in)

0.35-0.64

(3.5-6.5/

3.1-5.7)

0.49-0.98

(5-10/4.3-

8.7)

1.2-1.6
(12-16/

10.4-
13.9)

—

Ring Gear Backlash

mm (in) 0.15-0.20

(0.006-

0.008)

0.18-0.23

(0.007-

0.009)

0.19-0.29

(0.007-

0.011)

—

Ring Gear Run-Out

mm (in)

0.07

(0.003)

0.07

(0.003)

0.08

(0.003)

0.2

(0.008)

0.2

(0.008)

0.25

(0.01)

Clearance between the
Differential Pinion and
the Spider

mm (in) 0.07-0.13

(0.003-

0.005)

0.07-0.13

(0.003-

0.005)

0.05-0.13

(0.002-

0.005)

0.2

(0.008)

0.2

(0.008)

0.2

(0.008)

SERVICE INFORMATION 00-7

Clearance between the
Side Gear and the Differ-
ential Cage

mm (in)

0.05-0.11

(0.002-

0.004)

0.05-0.11

(0.002-

0.004)

0.13-0.2

(0.005-

0.008)

0.25

(0.01)

0.25

(0.01)

0.25

(0.01)

Play in Splines between
the Side Gear and the
Axle Shaft

mm (in) 0.02-0.12

(0.0008-

0.005)

0.08-0.15

(0.003-

0.006)

0.2

(0.008)

0.25

(0.01)

0.3

(0.012)

0.5 (0.02)

Clearance between the
back face of the Side
Gear and the Differential
Cage

mm (in) 0.13-0.18

(0.005-

0.007)

0.21-0.28

(0.008-

0.011)

0.10-0.38

(0.004-

0.015)

—

REAR HUB

Rear Hub Bearing Pre-
load (At Wheel Pin)

N (kg/lb)

42-52 (4.3-5.3/

9.5-11.7)

38-48.0 (3.9-
4.9/8.6-10.8)

—

FRONT DIFFERENTIAL

Pinion Bearing Preload

New Bearing

N (kg/lb)

16-29 (1.6-3.0/3.5-6.6)

—

Used Bearing

N (kg/lb)

8-14.5 (0.8-1.5/1.8-3.3)

—

Pinion Bearing Starting Torque

New Bearing

N

⋅m (kg⋅cm/

lb

⋅in)

0.69-1.27 (7.0-13.0/6.1-11.3)

—

Used Bearing

N

⋅m (kg⋅cm/

lb

⋅in)

0.35-0.64 (3.5-6.5/3.1-5.7)

—

Ring Gear Backlash

mm (in)

0.15-0.20 (0.006-0.008)

—

Ring Gear Run-Out

mm (in)

0.07 (0.003)

0.2 (0.008)

Clearance between the
Differential Pinion and
the Spider

mm (in)

0.07-0.13 (0.003-0.005)

0.2 (0.008)

Clearance between the
Side Gear and the Differ-
ential Cage

mm (in)

0.04-0.1 (0.002-0.004)

0.25 (0.01)

Play in Splines between
the Side Gear and the
Axle Shaft

mm (in)

0.02-0.12 (0.0008-0.005)

0.25 (0.01)

Clearance between the
Back Face of the Side
Gear and the Differential
Cage

mm (in)

0.13-0.18 (0.005-0.007)

—

FRONT HUB

Front Hub Bearing Preload (At wheel
pin)

New Bearing and New
Oil Seal

N (kg/lb)

NHR, NPR, NQR: 9.8-34.3 (1.0-

3.5/2.2-7.7)

NKR: 11.8-36.3 (1.2-3.7/2.6-8.0)

—

Reused Bearing and
New Oil Seal

N (kg/lb)

14-28 (1.4-2.9/3.1-6.4)

—

FREE WHEEL HUB

Clearance between the
Free Wheeling Hub Body
and the Snap Ring

mm (in)

0-0.5 (0-0.02)

—

Items

Service Standard

Limit

00-8 SERVICE INFORMATION

SERVICING

Change The Rear Differential Gear Oil

1. Remove the drain plug (1) and filler plug (2) and,

drain the gear oil.

2. Tighten the drain plug to specified torque.

Tighten:

Drain plug to 78 N

⋅m (8.0 kg⋅m / 57 lb⋅ft)

3. Fill the rear axle case with hypoid gear lubricant, to

just below the filler hole.

A: Except Straight Frame model
B: For Straight Frame model
C: For Straight Frame model, Colombia

Notice:

Limited Slip Differential (LSD)-Friction Type Model:
Use GL-5 LSD gear lubricant together with LSD Lubri-
cant Additive (ISUZU part No. 8-01052-358-0, GM part
No. #1052358) or equivalent.
Quantity
LSD Lubricant additive, 4 oz (112 g)

4. Tighten the filler plug to specified torque.

Tighten:

Filler plug to 78 N

⋅m (8.0 kg⋅m / 57 lb⋅ft)

Change The Front Differential Gear Oil

1. Remove the drain plug (1) and filler plug (2), and

drain the gear oil.

2. Tighten the drain plug to specified torque.

Tighten:

Drain plug to 83 N

⋅m (8.5 kg⋅m / 61 lb⋅ft)

3. Fill the front axle case with hypoid gear lubricant, to

just below the filler hole.

Front axle case oil capacity, 2.7 Liters (2.9 US / 2.4
Imp

⋅qt)

4. Tighten the filler plug to specified torque.

Tighten:

Filler plug to 83 N

⋅m (8.5 kg⋅m / 61 lb⋅ft)

Rear Axle Case Oil Capacity

L (US/Imp qt)

244 mm Diff.

2.7 (2.9/2.4)

292 mm Diff.

3.0 (3.2/2.6)

320 mm Diff.

(A) 3.4 (3.6/3.0) /
(B) 4.3 (4.5/3.8) /

(C) 5.2 (5.5/4.6)

N4A0001E

N4A0002E