TM 5-3895-383-24
Multifunction Valve
SMCS Code: 5064
Illustration 27
Propel Pumps
(1) Multifunction valves for the axle propel pump. (2)
Multifunction vales for the drum propel pump.
The two sets of multifunction valves are designed to provide
the following three functions:
High pressure relief valve
Makeup check valve
Bypass valve
The maximum working pressure of each loop line of the closed
circuit is limited to 48000 kPa (6960 psi) by these valves. This
valve is a direct acting type. The valve limits the main circuit
pressure to specified values which can be changed by
adjusting the valve setting.
High Pressure Relief Valve
Illustration 28
Multifunction Valve
(1) Cap. (2) Stud. (3) Locknut. (4) Spring. (8) Collar. (6)
Spring. (7) Spindle. (8) Passage. (9) Propel. (10) Seat. (11)
Seat.
The high pressure relief valve functions in order to protect the
circuit from high pressure spikes. The valve also protects
against damage to the circuit components if the POR valve
malfunctions. Oil from the high pressure side of the open
circuit enters the valve at passages (8). Spring (6) forces
spindle (7) against seat (11). The oil pressure acts against the
force of spring (6). When the circuit pressure reaches the high
pressure relief setting, spindle (7) is lifted off seat (11). This
movement instantly dumps high pressure oil into the low
pressure side of the closed circuit.
10-34
