SDLG WP6, Руководство по обслуживанию

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Service Manual for WP6 Diesel Engine
108
Troubleshooting:
1) Check engine oil quality and impurity content, compare it with application standard, replace the
oil immediately if out of limits;
2) Check engine oil pressure (air compressor oil inlet port), check whether engine oil pipe is
damaged or blocked, adjust, clean or replace the invalid pipe if the oil pressure is insufficient;
3) Check installation position of bearing shell, oil hole on bearing shell should be aligned to
housing oil hole.
4) Check whether bearing shell and connecting rod bearing shell are damaged, check whether
crankshaft is damaged or worn when replacing or repairing the shell.
Check and adjust bearing shell clearance.
(6) Air compressor leaking oil
Fault phenomenon: Lubricating oil oozes from air compressor housing.
Possible causes:
1) Oil seal has fallen off or oil seal is damaged.
2) Main shaft is loose.
3) Oil leakage in junction surface, oil inlet and return pipe joints are loose.
4) The belt is too tight, which results in wear of main bearing shell.
5) Casting or manufacturing deficiency
Troubleshooting:
1) Oil seal
Check whether oil seal is fractured, whether its inner lip is cracked or turnup, replace the seal if
any situation listed above occurred. Check the junction surface between oil seal and main shaft
for scratch and flaw, scratched and flawed parts should be replaced. Check whether return oil is
unblocked, blocked return oil will cause high oil pressure in crankcase that leading to oil
leakage in seal or oil seal falling off. Oil return pipe diameter must meet the minimum
requirements, and the pipe should not be twisted. Check the fit dimension of oil seal and
crankcase, replace the unfitted seal.
2) Move the main shaft with all your strength to check whether the radial clearance is too large,
replace the bearing shell and seal if so.
3) Check all sealing gaskets for sealing performance, repair or replace the gasket; check fixing
bolts of oil inlet pipe joint, oil return pipe joint and the housing, and tighten them.
4) Check and adjust the belt tightness degree (press the belt with your thumb, it is suitable if the
belt is depressed about 10mm).