TM 9-2320-366-34-1 2-996 CAUTION WARNING Wear approved eye protection when performing pressure checks. Failure to comply may result in oil getting into eyes. If oil contacts eyes, seek medical attention immediately. Fuel and oil are slippery and can cause falls. Wipe up spilled fuel or oil with rags. Failure to comply may result in injury to personnel. Exercise caution when operating stiffleg. Failure to comply may cause hoses to rub against stiffleg causing damage to equipment. (Continued from previous page) UPPER MAIN CONTROL VALVE PRESSURE/FLOW TEST (CONT)   (5)  Connect hydraulic tester to hydraulic system:         (a)  Connect test hoses to pressure and               reservoir ports of hydraulic tester.         (b)  Connect pressure test hose to right stiffleg               extend hose.         (c)  Connect reservoir test hose to right stiffleg               retract hose. NOTE Steps (6 through 8) require the aid of an assistant. (Continued on next page) Drop hydraulic pressure to zero before disconnecting any hydraulic hose, tube, or fitting. Failure to comply may result in injury to personnel.   (6)  Start engine (TM 9-2320-366-10-1).   (7)  Position PTO switch to on (TM         9-2320-366-10-1).   (8)  Increase engine RPM to 1250-1450 RPM (TM         9-2320-366-10-1).   (9)  Position RIGHT STIFFLEG control valve handle         DOWN. (10)  Perform flow test and note reading. (11)  Perform pressure test and note reading. (12)  If flow and pressure are below 12 gpm and         2400 psi, repair or replace upper main         valve assembly (para 16-83). (13)  If flow and pressure are 12 gpm and 2400-3000         psi, repair or replace right stiffleg cylinder         (para 16-68). h3.  M1089 RIGHT STIFFLEG DRIFTS OR DOES NOT WORK (CONT)