MAIN PUMP FLOW TEST
Remove all tools and exit bowl before performing this test. Failure
to comply may result in severe injury to personnel or damage to
An insufficient flow of hydraulic oil is indicated if ejector requires
more than 32 seconds to fully extend or if apron requires more
than 15 seconds to fully raise.
Start engine and allow engine to idle (750-850 rpm).
With ejector fully retracted, hold EJECTOR CONTROL lever in FORWARD, and note
length of time required for ejector to fully extend.
With apron in full down position, move APRON CONTROL lever to UP, and note length of
time required for apron to fully raise. Lower apron.
Stop engine; relieve hydraulic pressure.
SUSPENSION PORT 17 PRESSURE TEST
Perform this test at ports 17R and 17L on the directional control
valve bank. Use the right-hand suspension control lever for port
17R and the left-hand suspension control lever for port 17L.
Have suitable container ready to catch oil.
Disconnect hose (1) from tee (2) on port 17 of suspension control valve. Plug hose (1).
Connect pressure measuring device (3) to tee (2).
Have assistant start engine, move SPRUNG/UNSPRUNG lever to SPRUNG, and
SUSPENSION CONTROL lever to RAISE. Read pressure measuring device (3).
Stop engine; relieve hydraulic pressure. Remove all test equipment and connect hose.
Refer to TM 5-2350-262-20-2.