Main Winch Cable. If winch has not been used since last semiannual service, completely unwind and clean
cable (1). Brush soak cable with OE and wipe to remove excess oil. Rewind cable.
Drain transmission oil only when hot after operation.
New transmissions are filled with preservative oil which should be drained
after 100 miles (161 km) (or 10 hours) of operation and again after 500 miles
(805 km). Refill with proper grade of lubricant (see tab. F-1).
Periodically, a sample of oil shall be sent to the AOAP laboratory for analysis.
Oil is to be drained after every 25 hours of operation or every 30 days,
whichever comes first (refer to TB 430210). If laboratory is not available, hard
time intervals will apply.
When AOAP laboratory support is not available, drain and refill transmission
oil at 1500 miles (2414 km) or semiannually.
Coordinate any seasonal change of oil weight with this service.