Front Exhaust Pipe Installation; Exhaust Brake Unit Inspection - Isuzu NHR 4J Series Workshop Manual

INSTALLATION
4. Front exhaust pipe.
3. Front exhaust pipe fixing bolts and nuts.
• Tighten the fixing nuts to the specified torque
2. Front exhaust pipe mounting bracket fixing bolt and nut.
• Tighten the fixing bolt to the specified torque
1. Exhaust manifold fixing nuts
• Tighten the fixing nuts to the specified torque
6F-7-1.tif
• Connect battery ground cable.
• After assembling each part, start the engine to check
for any leakage of gas at each connection.
Exhaust Brake Unit
INSPECTION
Operational inspection
• With the engine idling, operate the exhaust brake to
check for the sound of the valve hitting against the
stopper.
Unit inspection
• Check to see if the exhaust valve opens and closes
smoothly when the power chamber is
applied with a negative pressure (400 mmHg - 700
mmHg) by the vacuum pump.
6F-5-2.tif
• Check to see if the clearance between the valve and
the body is in the range of 0.1 mm - 0.2 mm (the
minimum of 0.1 mm) on an average of the points "A"
and "B" when the power chamber is applied with a
negative pressure (650 mmHg - 700 mmHg) by the
vacuum pump.
When the clearance is outside this range, adjust the
clearance with the adjust bolt.
6F-5-3.tif
ENGINE EXHAUST 6F – 5
N∙m (kg∙m/lb∙ft)
50 (5.1/37)
N∙m (kg∙m/lb∙ft)
40 (4.1/30)
N∙m (kg∙m/lb∙ft)
69 (7/51)