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 TM 55-1905-220-14-5
3-68. BLOWER - MAINTENANCE INSTRUCTIONS (Cont).
g. LUBRICATION
(1) Oil drains from the valve operating mechanism on the cylinder head into the camshaft pocket in the
cylinder block; then, when it reaches a certain level, the oil flows from the pocket into cavities at the upper
corners of the blower and through passages in the blower and end plates to lubricate the bearings, governor
and water pump drives at the front end, and bearings and gears at the rear end of the blower. A slinger
attached to the front end of the lower rotor shaft throws oil onto the front roller bearings and governor weights.
A dam in the blower end plates maintains oil at a level adequate to submerge the lower portion of the slinger
and the driven gear.
(2) Surplus oil overflows the dams in the end plates and returns through two drilled holes in the cylinder
block to the engine crankcase.
3-1217
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