TM 5-3895-383-24
Makeup Check Valve
Illustration 29
Multifunction Valve
(1) Cap. (2) Stud. (3) Locknut. (4) Spring. (5) Collar. (6)
Spring. (7) Spindle. (8) Passage. (9) Poppet. (10) Seat. (11)
Seat.
The multifunction valve has a second function. The valve acts
as a makeup valve for the closed circuit. When the pressure in
passages (8) (low pressure side of the closed circuit) drops
below the charge pressure, charge oil fills the closed circuit.
Charge oil pressure on poppet (9) compresses spring (4).
Poppet (9) is lifted off seat (10). Oil from the charge loop flows
into the low pressure side of the open circuit. When the
pressure in the low pressure side of the open circuit increases
to charge pressure, the force of spring (6) doses poppet (9) on
seat (10).
Bypass Valve
Illustration 30
Multifunction Valve
(1) Cap. (2) Stud. (3) Locknut. (4) Spring. (5) Collar. (6)
Spring. (7) Spindle. (8) Passage. (9) Poppet. (10) Seat. (11)
Seat.
The multifunction valve has a third function. The valve allows
the machine to be towed. To tow the machine, loosen locknut
(3) and turn stud (2) clockwise until the stud makes contact
with the top of collar (5). Spring (4) is compressed. Then turn
stud (2) until the top of the stud is flush with locknut (3).
Spindle (7) moves downward and the oil flows across seat
(11). This action allows the oil to pass from one side of the
closed circuit to the other side.
NOTE:
Brakes must be released prior to towing.
10-35
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