QUANCHAI N485D, Руководство по обслуживанию

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ANHUI QUANCHAI ENGINE CO., LTD
Inspection
Tools:
Depth gauge
Dial gauge
1) Before removing the valve spring, check the
depth of the valve under the cylinder head.
2) Clean the valve head and the bottom of the
cylinder head.
3) Place the depth gauge on the surface of
cylinder head, and adjust the dial gauge to zero.
4) Carefully place the valve depth gauge on each
valve head, and record the measurement results.
5) If the valve depth exceeds the limit, check the
depth at the same position with a new valve. If
the valve depth is over-limit again and equipped
with a valve seat insert, replace the insert.
6) When the valve seat insert is not installed,
process the bottom of the cylinder head to reduce
the valve depth, or install the insert instead.