TM 5-2350-262-20-3
MAIN RELIEF VALVE TEST
WARNING
Before performing any hydraulic troubleshooting in bowl, move
ejector forward and disable it by disconnecting ejector cylinder
from hydraulic system. Failure to comply may result in severe
injury or death to personnel.
NOTE
Have suitable container ready to catch oil.
Move ejector forward, stop engine, and relieve hydraulic pressure.
Disable ejector by disconnecting CONT VLV-21 hose (1) from elbow (2) at port 21 and
CONT VLV-22 hose (3) from elbow (4) at port 22 on ejector control valve. Cap and plug
hoses and fittings
Connect tee (5) and pressure measuring device (6) between HYDR FLTR-IN-13L hose (7)
and high-pressure inlet port 13L.
Have assistant start engine, move the SPRUNG/UNSPRUNG lever to SPRUNG, and
move EJECTOR CONTROL lever to BACK. Read pressure measuring device (6).
While simultaneously holding the EJECTOR CONTROL lever in BACK, have assistant
move left-hand SUSPENSION CONTROL lever to RAISE. Read pressure measuring
device (6).
Stop engine; relieve hydraulic pressure.
MAIN RELIEF VALVE ADJUSTMENT
Loosen jamnut (8) on main relief valve 13L (9).
Have assistant start engine and simultaneously hold EJECTOR CONTROL lever in BACK
while holding left-hand SUSPENSION CONTROL lever in RAISE.
Rotate adjusting screw clockwise to increase pressure; counterclockwise to decrease
pressure. Tighten jamnut (8).
Stop engine; relieve hydraulic pressure.
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