Section 5 - Maintenance
90-866938081 MAY 2009 Page 107
3. Remove the M30 drain plug and sealing washer from the aft, starboard end of the
transmission and drain the transmission oil (fluid) into a suitable container.
a - Transmission
b - Drain plug and sealing washer
4. On models with a drop box, remove the drain cap from the lower, port side of the drop
box. Drain the transmission oil into a suitable container.
a - Drop box
b - Drain cap
NOTE: Except in the cases of extreme contamination or mechanical failure, it is not
necessary to drain the oil from the engine‑mounted transmission oil cooler, if equipped.
Engine‑mounted transmission oil cooler
5. Dispose of the transmission oil properly.
6. Clean the exterior of the transmission around the oil filter assembly.