WEICHAI WD10 Service Manual - page 26
Service Manual for WD10 Diesel Engine
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intake valve (and exhaust valve) and rocker).
(3) Measure the clearance between rocker and valve rod upper surface with feeler gauge. Required
intake valve clearance for WD10 diesel engine is 0.3mm; while that for exhaust valve is 0.4mm.
If the clearance is too large or too small, you can rotate the adjusting screw to adjust until the
clearance meets the requirements. Refer to Fig. 2-9.
Adjusting
screw
Cold-state intake valve clearance is 0.3mm
Cold-state Exhaust valve clearance is 0.4mm
Fig. 2-9 Intake and exhaust valve clearance
(4) After checking cylinder 1 or cylinder 6, rotate the flywheel positively with external force for
another 360° to let cylinder 6 or 1 in power stroke, check and adjust other valves.
Table 2-4
Cylinder 1 Cylinder 2 Cylinder 3 Cylinder 4 Cylinder 5 Cylinder 6
Cylinder
1
in
compression stroke
Intake and
exhaust
valves
Intake
valve
Exhaust
valve
Intake
valve
Exhaust
valve
Cannot be
adjusted
Cylinder
6
in
compression stroke
Cannot be
adjusted
Exhaust
valve
Intake
valve
Exhaust
valve
Intake
valve
Intake and
exhaust
valves
For exhaust valve equipped with EVB auxiliary braking device, follow the steps below to adjust its
clearance:
(1) Rotate the flywheel until the piston is in compression stroke TDC.
(2) Loosen bolt assembly 2.
(3) Adjust valve clearance adjusting screw on pushrod end 10 without compressing exhaust valve
rocker sealing surface until the total valve clearance is 0.4mm, and then tighten bolt assembly 2.
(ATTENTION: In the adjusting process, you should rotate the valve clearance adjusting
screw until the feeler gauge is gently infibulated, so that valve rocker piston 5 can be
pushed to the bottom and no clearance between piston and piston hole bottom).
(4) Loosen bolt assembly 2.
(5) Adjust bolt assembly 2, and insert a 0.25mm feeler gauge between bolt 2 and valve bridge, and
tighten lockup nut at last.