Section G. Maintenance
Belarus – 90/92 Operating manual
78
Maintenance-1 (M-1) after every 125 hours of operation
Perform operations of the previous
maintenance and those given below:
Operation 4. Level and state of oil in
air purifier sump of engine
Loosen two nuts (1) and take off sump
(2) of air purifier(3). Check oil level in
the sump, which should be at the ring
belt level «
А
».
Add oil, if necessary. If oil contains dirt
and water, replace oil.
ATTENTION! Do not overfill sump with
oil above ring belt «
А
», as this may lead
to oil getting inside engine combustion
chamber and make false impression of
excessive oil consumption due to burning
loss.
Operation 5. Oil level in FDA casings
of upper coned pairs with bevel gear
speed reducers.
Check the oil level, which should be at
lower edge of oil filler neck (1). Fill oil up, if
necessary.
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