TM 10-3930-641-34-2
SUPPLEMENTAL STEERING SYSTEM (CONT)
(Sheet 4 of 4)
11. DIVERTER VALVE. Senses the pressure and controls the flow direction
The supplemental steering system has two purposes:
of the oil from the primary and supplemental pumps.
To give an oil supply for the steering system if there is a failure of the
12. FLOW SWITCH. Electrically operates an instrument light to warn the
primary system or if the engine stops when the machine is moving.
operator the primary pump system has failed.
To add oil to the primary oil flow when the engine rpm is less than 1170 to
1300 rpm and the machine is moving.
10. SUPPLEMENTAL STEERING PUMP. A ground driven, gear type
pump. Ground driven means that the pump turns as long as the
machine moves. The pump gets its power from the output transfer
gears of the transmission. Its function is to supply oil to the steering
system when there is a failure of the primary pump or when the engine
stops and the machine is still moving. It also adds oil to the primary oil
flow when the engine is turning at less than 1170 to 1300 rpm and the
machine is moving. The oil sup- ply is from the same tank as the
primary pump.
End
6-5
