TM 5-3805-281-24-1
Theory of Operation
PILOT PUMP OPERATION
9025
05
2
is connected to the pilot pressure regulating valve and
The pilot pump (K) is a fixed-displacement, external
pilot filter. The outlet is also connected by tubes to the
gear pump. The pilot pump is attached to the pump
front and rear pump regulators and by a passage in
drive gearbox between the front and rear pumps. The
the front and rear pump housing to the small end of
pump is driven at engine speed by the input drive shaft
pump servo pistons.
for the pump drive gearbox.
The inlet port (J) is connected by a suction line to the
suction line for the front and rear pumps. Outlet port (I)
CED,TX08227,3040
1925MAR981/1