Isuzu N-Series. Service manual - part 545

6F-10   Exhaust System

Torque Specifications

N.m (kg.m / lb.ft)

24 (2.4 / 17)

24 (2.4 / 17)

34 (3.5 / 25)

17 (1.7 / 12)

17 (1.7 / 12)

67 (6.8 / 49)

41 (4.2 / 30)

50 (5.1 / 36.9)

N6A6438E

Exhaust System   6F-11

Exhaust Brake System

Service Precautions

During assembly and mounting, mount the parts
appropriately at the specified tightening torque value.

Explanations on Functions and Operation

Functional Check

Operational check

• Confirm the sound of the valve touching the

stopper when the exhaust brake is operated in the
idling condition.

N6A6439E

6F-12   Exhaust System

Exhaust Brake

Components

Legend

1. Power Chamber, Insulator, Gasket and Bearing
2. Lock Nuts and Clevis Joint
3. Split Pin and Washer
4. Exhaust Brake Valve

5. Front Exhaust Pipe B
6. Exhaust Brake Assembly
7. Front Exhaust Pipe A

 

Removal

1. Remove the vacuum hose and clips.
2. Remove the nut.
3. Remove the exhaust pipe.
4. Remove the exhaust brake assembly.

Disassembly

1. Remove the split pin.
2. Remove the lock nuts.
3. Remove the clevis joint.
4. Remove the power chamber.

Reassembly

1. Mount the power chamber.

Tighten:
Nut to 14 N

⋅m (1.4 kg⋅m/122 lb⋅in)

2. Mount the lock nuts.

N6A6440E

N6A6441E

Exhaust System   6F-13

3. After mounting the clevis joint, tighten the lock nuts

to the specified torque.

Tighten:
Lock nut to 13 N

⋅m (1.3 kg⋅m/113 lb⋅in)

4. Mount the split pin.

Inspection

Check for damage or degradation in the parts
mentioned below.

• Exhaust brake valve
• Exhaust brake shaft
• Butterfly valve
• Bush
• Power chamber

Unit check

• Negative pressure in the power chamber caused

by the vacuum pump
When a pressure of 53.3 - 93.3 kPa (0.54 - 0.95
kg/cm

2

 / 7.7 - 13.5 psi) is applied, the exhaust

brake valve should open or close smoothly.

Installation

1. Mount the exhaust brake assembly.

Tighten:
Bolt and nut to 17 N

⋅m (1.7 kg⋅m/12 lb⋅ft)

N6A6442E

N6A6443E

N6A6444E