Isuzu N-Series. 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
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