TM 9-2350-238-34-2
2-39. MAINTENANCE OF PRESSURE RELIEF VALVE 12253778-1 AND PRESSURE
RELIEF VALVE 12253778-2 (CONT).
ADJUSTMENT OF CHECK VALVE
l
l
l
l
l
1
2
3
Make sure all personnel stand clear when operating boom to avoid injury to personnel.
When testing hydraulic system, be sure boom is in stowed position, as failure of
system may result in injury to personnel.
NOTE
Perform installation procedures prior
to adjustment of pressure relief
valves. Refer to page 2-154.
Steps 1 thru 11 are written for right
pressure relief valve, but also apply
to left pressure relief valve and mid-
dle pressure relief valve.
Valve adjustment requires two
persons.
Turn off hydraulic system (TM 9-2350-
238-10).
Remove spring cap (1) from boom
cylinder pressure relief valve (2).
Install 3000 psi (20,685 kPa) oil
pressure tester in test port (3) on boom
cylinder pressure relief valve (2).
OIL PRESSURE
TESTER
2-182