Valves and Unit Injectors, Adjustment - Fuel Injection - Nut (Hardware) PDF
Valves and Unit Injectors, Adjustment - Fuel Injection - Nut (Hardware) PDF
Valves and Unit Injectors, Adjustment - Fuel Injection - Nut (Hardware) PDF
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W2005148
23
Adjust the unit injector’s rocker arm to zero clearance.
24
Tighten the adjusting screw 4 flats or 240 degrees of
clockwise rotation.
25
Torque-tighten the adjusting screw lock nut to 52 ± 4
Nm (38 ± 3 ft-lb).
52 ± 4 Nm (38 ± 3 ft-lb)
38 ± 4 Nm (28 ± 3 ft-lb)
27
Recheck valve clearance after the nut is tightened.
Note: Mark the rocker arm when the valve has been
adjusted.
D
Date Group No. Page
Service Bulletin 7.2007 214 52 10(17)
29
T2009074
T2009009 Note: Make sure that the wire or the screwdriver have
been well cleaned before they are used. Impurities
between the rocker arm piston and the rocker arm can
lead to the piston seizing and the brake function on the
cylinder failing to work. Make sure that the piston’s sliding
surface in the rocker arm is not damaged.
30
Continue adjustment on the same cylinder location by
checking the exhaust rocker valve clearance. Push down
on the back of the exhaust rocker and insert a feeler
gauge of the proper specification of
0.6 ± 0.05 mm (0.024 ± 0.002 in.) for non-VCB or
2.3 ± 0.05 mm (0.091 ± 0.002 in.) for VCB. Place the
feeler
exhaustgauge between
rocker the
requires bridge andloosen
adjustment, the plunger. If the
the lock nut
on the rocker and adjust the plunger. Tighten the lock nut
on the plunger by holding the adjusting screw in place
and torque-tighten the lock nut to 38 ± 4 Nm (28 ± 3 ft-lb).
38 ± 4 Nm (28 ± 3 ft-lb)
W2005146
D
Volvo Trucks North America Date Group No. Page
Service Bulletin 7.2007 214 52 11(17)
31
Measure the clearance between the rocker arm’s piston
and the bridge. Acceptable clearance is 0.6 ± 0.05 mm
(0.024 ± 0.002 in.) for non-VCB or
2.3 ± 0.05 mm (0.091 ± 0.002 in.) for VCB.
32
If the valve clearance needs to be adjusted, loosen the
lock nut without moving the adjusting screw.
33
With the engine cold, adjust the exhaust valve lash to the
above specification and torque-tighten the locknut to
38 ± 4 Nm (28 ± 3 ft-lb).
38 ± 4 Nm (28 ± 3 ft-lb)
Tip: Mark the rocker arm when the valve has been
adjusted.
35 Useful
Repeat the above procedure to adjust all other unit
injectors and valve locations by rotating the engine to the
Not useful
next nearest camshaft mark.
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