4-17. PUMP DRIVE AND PTO.
4-17.4 Reducer Gearbox Replace.
This task covers
Tool Kit, General Mechanic, Automotive,
3, Appendix E Antiseize Compound
15, Appendix E Gear Oil
20, Appendix E Penetrating Oil
200-A-2:1 Reducer Gearbox
Main Engine Shutdown (see para. 2-10)
MS51922-17 3/8 in. Locknut
APU Shutdown (see para. 2-12)
MS51922-9 5/16 in. Locknut
Batteries Disconnected (see para. 4-24)
Pump Body and Hose Body Heat Shield Removed
(see para. 4-11)
PTO to Reducer Gear Drive Shaft Removed
(see para. 4-17.2)
Reducer Gear to Pump Drive Shaft Removed
(see para. 4-17.3)
Serious injury could occur if heavy equipment is moved/lifted without sufficient personnel to
do the job. Use proper physical lifting procedures or use a suitable lifting device or dolly.
Wear safety shoes, gloves and other suitable protective clothing.
Damage to reducer gearbox bearings may occur if the companion flange or end yoke are
forced onto the shafts. Ensure that the bores and shafts are free from dirt, paint, or corrosion.
Clean or repair as necessary.
If the reducer gearbox fasteners are excessively corroded, apply penetrating oil (Item 20,
Appendix E) to ease disassembly.
(1) Remove the drain plug and drain reducer
gearbox lubricant into clean drain pan.
Reducer gearbox lubricant should be warm
prior to draining. Inspect sediment on drain
plug. This may help determine component
condition before disassembly.
(2) Remove the locknuts (1) and capscrews (2)
that retain the reducer gearbox (3) to the
mounting brackets (4).