Isuzu N-Series. Service manual - part 205

 

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Isuzu N-Series. Service manual - part 205

 

 

SERVICE INFORMATION 00-37

Rear Brakes (NPR / NQR / NPS)

BR

AKE

 C

O

N

T

R

O

L

A

B

S

34

H

B

B

33

E

X

H

A

U

S

T

B

R

A

K

E

32

L

S

P

V

31

D

S

P

V

30

MA

ST

ER

 C

Y

L.

In

side dia.

(in)

1

+

3

/

8

29

1

+

1

/

4

28

1

+

1

/

8

27

1

+

1

/

16

26

9

+

10

T

25

8

+

9

T

24

PA

R

K

IN

G

 

BR

A

K

E

LI

NING

Wi

dt

h

(m

m)

5

0

23

4

5

22

DRU

M.

In

side 

dia.

 (in)

2

0

3

21

1

9

0

20

R

E

AR

 BR

AKE

DRUM

 B

R

A

K

E

LINING

Wi

d

th

(mm

)

1

5

0

19

1

2

0

18

1

0

0

17

9

0

16

7

5

15

6

0

14

DRUM

.

In

side dia.

(in)

3

7

0

13

3

2

0

12

3

0

0

11

2

7

9

10

2

6

0

9

2

2

8

8

W

H

EE

L CY

L.

In

side dia.

(i

n

)

1

+

3

/

8

7

1

+

5

/

16

6

1

+

3

/

16

5

1

4

7

/

8

3

Ty

p

e

D

2

L

W

A

U

T

O

2

D

2

L

W/O

A

U

T

O

1

Mo

de

ls

NQR7

0R

L

-5

LYXJT

NQR7

0R

L

-5

N

XYRJ

NQ

R7

5T

L-

5

LXYEJ

NQ

R7

5T

L-

5

LXYEJ

2

NQR7

5T

L-

5

K

WYE

J

NQR7

5T

L-

5

K

WYE

J2

N

P

S

71L

L-

5JX

Y

NPR7

1

LU-

5

LXYPJ

NQ

R7

0L

U

-5

NXYPJ

NQ

R7

5L

U

-5

NXYPJ

NPR7

1

P

U

-5

L

XY

PJ

NQ

R7

0RU-

5N

XYPJ

NQ

R7

5RU-

5N

XYPJ

Not

 ava

ilable

S

tandard

F

a

ct

ory opt

ion

Non

No

.

12

1

12

2

12

3

12

4

12

5

12

6

12

7

12

8

12

9

13

0

13

1

13

2

13

3

(

(

(

(

00-38 SERVICE INFORMATION

SERVICE STANDARD

ITEMS

SERVICE STANDARD

SERVICE LIMIT

FRONT DISC BRAKE ASSEMBLY

Pad Thickness (

φ 265 mm)

mm (in)

14.0 (0.551)

1.0 (0.039)

Pad Thickness (

φ 293 & φ 310 mm)

mm (in)

13.0 (0.510)

1.0 (0.039)

Piston and Cylinder Clearance

mm (in)

0.08 — 0.18

(0.0031 — 0.0071)

0.23 (0.0091)

Disc Lateral Run out

mm (in)

0.13 (0.005) or less

Disc Maximum Parallelism

mm (in)

0.02 (0.0008)

Disc Thickness (

φ 265 mm)

mm (in)

35.0 (1.378)

28.5 (1.122)

Disc Thickness (

φ 293 mm)

mm (in)

40.0 (1.575)

37.0 (1.457)

Disc Thickness (

φ 310 mm)

mm (in)

42.0 (1.654)

39.0 (1.535)

FRONT DRUM BRAKE ASSEMBLY

Brake Drum Inside Diameter

mm (in)

279.4 (11.00)
300.0 (11.81)

320.0 (12.60)

281.0 (11.06)
301.5 (11.87)

321.5 (12.66)

Brake Drum Run-out

mm (in)

0.13 (0.005) or less

Brake Lining Thickness or Rivet Depth

mm (in)

1.0 (0.039)

Wheel Cylinder and Piston Clearance

mm (in)

0.15 (0.006)

REAR DRUM BRAKE ASSEMBLY

Brake Drum Inside Diameter

mm (in)

228.6 (9.00)
240.0 (9.45)

260.0 (10.24)

279.4 (11.0)

290.0 (11.42)
300.0 (11.81)

320.0 (12.60)
370.0 (14.57)

230.0 (9.06)
241.5 (9.51)

261.5 (10.30)

281.0 (11.06)
291.5 (11.48)
301.5 (11.87)

321.5 (12.66)
372.0 (14.64)

Brake Drum Run-out

mm (in)

0.13 (0.005) or less

Brake Lining Thickness or Rivet Depth

mm (in)

1.0 (0.039)

Wheel Cylinder and Piston Clearance

mm (in)

0.15 (0.006)

BRAKE PEDAL AND CONTROL

Master Cylinder and Piston Clearance

mm (in)

0.11 — 0.195

(0.004 — 0.008)

0.22 (0.009)

PARKING BRAKE

Brake Drum Inside Diameter

mm (in)

178.0 (7.01)
190.0 (7.48)
203.2 (8.00)

179.0 (7.05)
191.0 (7.52)
205.0 (8.07)

Brake Drum Run-out

mm (in)

0.05 (0.002) or less

Brake Lining Thickness

mm (in)

1.0 (0.039)

EXHAUST BRAKE

Butterfly Valve and Body Clearance

(4HF1 Engine)

mm (in)

0.4 — 0.6 (0.016 — 0.024)

(Other Engine)

mm (in)

0.1 — 0.2 (0.004 — 0.008)

SERVICE INFORMATION 00-39

SERVICING

Service Brakes

Wheel Brake Adjustment

Brake Lining Clearance Adjustment (2L and D2L)
Without auto-adjuster type

1. Chock the wheels not being adjusted.
2. Jack up the axle until the wheels can be turned

freely.

3. Manually shake the wheel to check for excessive

play.

4. Remove the grommet fitted to one of the brake

drum cover adjuster holes.

5. Insert a screwdriver into the adjuster hole.

Manually rotate the wheel while turning the adjust-
er (A) in the direction of the arrow (1) until resis-
tance is felt at the wheel.

6. Back off the adjuster (A) in the direction of the ar-

row (2) the specified number of notches.

2L

D2L

7. Install the grommet to the adjuster hole.
8. Repeat Steps 4 through 7 on the other wheels.
9. Lower the vehicle to the ground.

With auto-adjuster type

1. Measure the internal diameter of the brake drum.

• Take measurement of the distance at (A), (B)

and (C) points.

2. Measure the external diameter of the brake shoe.

• Take measurement of the distance at (A), (B)

and (C) points.

Specified Notches

Front

Rear

5-6

N5A0001E

N5A0002E

N5A0003E

00-40 SERVICE INFORMATION

3. Turn the adjuster gear so that the difference be-

tween the internal diameter of the brake drum and
the external diameter of the brake shoe becomes
0.6 mm (0.024 in).

4. Step on the brake hard while turning the brake

drum in the forward direction, or while driving for-
ward.

Brake Pedal Adjustment

Brake Pedal Height and Free Play Adjustment
Vacuum Booster (Master Vac) Type:
The height of push rod should be adjusted so that the
distance from its master cylinder mounting surface to
end measures 18.2 mm (0.717 in).

For push rod length adjustment, the distance from the
center of crevis pin hole to brake pedal bracket mount-
ing surface should be set at 109 mm (4.291 in); without
spacer, 129 mm (5.079 in); with spacer.
When fixed under this condition, there is no need to ad-
just the height of brake pedal from floor and free play.

Notice:

• As vacuum booster (Master Vac) is undetachable

type, it should be replaced as an assembly if it
does not work well.

• Be sure to adjust the stop light switch.

Brake Pedal Free Play and Allowance
Standard value

1. Free play: 4 to 7 mm (0.16 to 0.28 in)

24 to 29 mm (0.94 to 1.14 in) for HBB type

(When depressed with force of the 490 N (50 kg / 110
lbs).)

(When depressed with force of the 294 N (30 kg / 66
lbs).)

N5A0004E

N5A0005E

2. Allowance

mm (in)

NHR

Front Drum Brake

50 (1.97)

NKR

Front Disc Brake Model

40 (1.57)

Front
Drum
Brake
Model

Less than
GVM 6.5 ton

60 (2.36)

GVM 6.5 ton

40 (1.57)

NPR
NQR

Front Disc Brake Model

40 (1.57)

Front
Drum
Brake
Model

Less than
GVM 6.5 ton

60 (2.36)

GVM 6.5 ton
or more

40 (1.57)

NPS

Front Drum Brake

40 (1.57)

NPR, NQR
(HBB type)

Front Disc Brake Model

35 (1.38)

Front Drum Brake Model

45 (1.77)

N5A0006E

 

 

 

 

 

 

 

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