3-21. CHECKS AND ADJUSTMENTS AND FLOWMETER TESTS
Check (SHEET 1 OF 2). This task covers
checking of main relief valve pressure setting.
TOOLS: No. 1 Common Organizational Maintenance Tool Kit
Slip joint pliers
Pressure gage, zero to 3000 psi range
MATERIALS/PARTS: Clean cloths (Appendix C, item 1)
Cleaning solvent P-D-680 (Appendix C, item 2)
Dry cleaning solvent P-D-680 used to clean parts is toxic and flammable.
Wear protective goggles and gloves and use only in a well ventilated
area. Avoid contact with skin, eyes and clothes and dont breathe
vapors. Do not use near open flame or excessive heat and dont smoke
when using it. Failure to do so could cause serious injury. If you
become dizzy while using cleaning solvent, get fresh air and medical
attention immediately. If contact with skin or clothes is made, flush
with large amounts of water. If contact with eyes is made, wash eyes
with water and get medical aid immediately.
Using clean cloth moistened
with cleaning solvent P-D-
680, clean all dirt and
grease from quick disconnect
coupling (1) at pump outlet.
Remove cap from quick dis-
connect coupling (1).
Connect pressure gage to
quick disconnect coupling.
Ensure that pressure gage
hose is long enough to read
gage from operators seat.
If necessary, warm hydraulic oi1 to operating temperature:
(a) Start and operate engine at full throttle.
(b) Place BUCKET control lever (2) in CROWD position and
hold for 15 seconds.