Theory of Operation
are driven at a speed slower than engine speed
The front pump (H), rear pump (F) and pilot pump (G)
through a gear train by the input drive shaft. The gear
are mounted on the pump drive gearbox (C) which is
ratio for the front and rear pump speed to engine
fasten to the engine flywheel housing. Each pump is
speed is 0.95.
contain in its own housing.
The engine speed sensor (B), front, and rear pump
Engine power is transferred to the pumps by the
pressure sensors (S and Y) send electrical signals to
dampener drive (flex coupling) (A), the pump drive
the engine and pump controller to provide control for
engine speed, pumps, and control valve.
pump is driven at engine speed by the input drive shaft
for the pump drive gearbox. The front and rear pumps