TM 9-2350-238-34-22-39. MAINTENANCE OF PRESSURE RELIEF VALVE 12253778-1 AND PRESSURERELIEF VALVE 12253778-2 (CONT).ADJUSTMENT OF CHECK VALVE lllll123Make 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 ofsystem may result in injury to personnel.NOTEPerform installation procedures priorto adjustment of pressure reliefvalves. Refer to page 2-154.Steps 1 thru 11 are written for rightpressure relief valve, but also applyto left pressure relief valve and mid-dle pressure relief valve.Valve adjustment requires twopersons.Turn off hydraulic system (TM 9-2350-238-10).Remove spring cap (1) from boomcylinder pressure relief valve (2).Install 3000 psi (20,685 kPa) oilpressure tester in test port (3) on boomcylinder pressure relief valve (2).OIL PRESSURETESTER2-182
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