Operation Manual

Job Card No.:
Engine:
Filing No.:
©1084
Crankshaft System Overhaul
Safety Precautions
0178-01-10 1081
02.00.01
S/BVM 628
Prior to Work
● Stop engine.
● Close shut-off valve on air receivers.
● Bleed air piping to engine.
● Open indicator valves.
● Wait 10 minutes before removing crankcase
doors and some further minutes, allowing crank-
case oil mist to dissipate, before starting work.
Remove cover (3) along with oil dipstick (1)
and guide tube (2).
During Work
Make sure that
- No further persons are present before turning the
crankshaft.
- No tools will interfere with crankshaft turning.
- The motion parts will not be put out of balance by
removing components.
- The propeller shaft, where provided, will be disen-
gaged or otherwise the propeller can turn freely.
- The barring gear is properly engaged.
- The engine will not turn as the propeller shaft is
turned.
Before refitting crankcase doors, check that
all tools, rags etc. have been removed from
the crankcase interior.
After the work
● Before refitting the crankcase door, ensure that all
tools, rags etc. have been removed from the
crankcase interior.
● Replace any defective door gaskets.
● Tighten fastening bolts of crankcase doors.
● Before putting the engine back to service, turn
crankshaft with indicator valves open.
● Close indicator valves.
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