TM 9--2350--292--20--1
0097 00--17
BOOM FAILS TO OPERATE OR OPERATES ROUGHLY -- CONTINUED
0097 00
AE
Is pressure at shutoff valve PILOT port greater than 0
but less than 60 psi?
CONTINUED FROM STEP AD
no
yes
CONTINUED ON NEXT PAGE
1. Start main engine and energize hydraulic
system (TM 9--2350--292--10).
2. Place boom safety valve handle in STOW
position.
3. Perform Step AD.
4. Shut down hydraulics and main engine
(TM 9--2350--292--10).
Notify Direct Support
Maintenance.
AF
If boom control handle is in RETRACT, is pressure at P
test 1800--2300 psi, BL port 1575--1900 psi and BR port
pressure 75 psi or less?
1. If boom is stowed in travel lock place wood
blocks between boom and hull forward of air
cleaner inlets.
2. Start main engine, set speed to 1800 rpm and
energize main hydraulics (TM
9--2350--292--10).
3. Place boom control handle in RETRACT
position (if boom is in live range place handle
to FORWARD position).
4. Record pressures at ports P TEST, BR and BL
of hydraulic control valve manifold assembly.
5. Shut down hydraulics and main engine
(TM 9--2350--292--10).
Is pressure boom shutoff valve at port A approxi-
mately 440--625 psi?
no
yes
Notify Direct Support
Maintenance.