TM 5-3895-379-23
PROPEL AND VIBRATORY VALVE TESTS AND ADJUSTMENTS - CONTINUED
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REVERSE MAIN RELIEF VALVE PRESSURE TEST - CONTINUED
NOTE
Maximum pressure should be 6525 + 200 psi (45,000 + 1380 kPa).
7.
Move propel control lever to the full reverse position
12
17
15
10
(TM 5-3895-379-10).
11
8.
If needed, adjust as follows:
13
a.
Stop engine (TM 5-3895-379-10) and remove
14
valve cap (13).
b.
Remove cartridge (14) and reinstall cap (13) to
16
prevent oil from spilling.
c.
Clamp cartridge (14) in a soft-jawed vice.
d.
Loosen locking setscrew (15).
NOTE
One full turn equals 638 psi (4400 kPa).
e.
Turn spindle (16) to adjust pressure: clockwise to
increase pressure, counterclockwise to decrease
pressure.
f.
Tighten locking setscrew (15).
g.
Remove cartridge (14) from soft-jawed vice and
401-2024
install on propel pump (17).
h.
Install cap (13).
9.
Start engine (TM 5-3895-379-10) and check pressure at tap (8).
10.
Stop engine (TM 5-3895-379-10).
11.
Readjust POR valve (11) by turning adjuster (12) clockwise one-half turn.
12.
Tighten setscrew (5) on needle valve thumbscrew (6).
NOTE
Minimum low pressure is 6327 psi (43623 kPa).
13.
If minimum low pressure is not obtainable, there is too much leakage in the internal circuit.
FORWARD MAIN RELIEF VALVE PRESSURE TEST
1.
Place propel control lever in NEUTRAL (TM 5-3895-379-10).
2.
Loosen setscrew (5) and turn needle valve thumbscrew (6) fully clockwise to close the valve (7).
3.
Check pressure at pressure tap (9).
4.
Loosen adjuster locknut (10) on Pressure Override Relief (POR) valve (11).
5.
Turn adjuster locknut (10) clockwise one-half turn.
6.
Tighten adjuster locknut (10).
7.
Start and run engine at high idle (TM 5-3895-379-10).
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