Service Manual for WP6 Diesel Engine
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Fig. 2-12 Adjust valve clearance
(3) Measure the clearance between rocker and valve rod head with feeler gauge 1. Required intake
valve clearance for WP6 mechanical pump diesel engine is 0.2mm; while that for exhaust valve
is 0.3mm. If the clearance is too large or too small, you can loosen locking nut 2, and then turn
adjusting screw 3 to change the clearance. Keep adjusting screw 3 still and tighten locking nut
2, and then measure the clearance again. Repeat the above procedures until the clearance meets
the requirements.
Fig. 2-13 Adjusting screw
(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.