CORRECTIVE ACTION Continued
Test for faulty or improperly adjusted relief valve within system selector valve. Install pressure gage in
system selector valve gage port. With APU operating, and APU emergency winch control valve lever
placed in CLOSED position, place system selector valve lever in AUX position, and adjust relief valve.
Adjust relief pressure to 14501550 psi (999810,687 kPa). For location of valve gage port and
Replace system selector valve if pressure cannot be adjusted to 14501550 psi (999810,687 kPa)
Perform following tests using main hydraulic system (step 6 only).
Test boom combination control valve and flow regulators. Inspect for mechanical failure of boom
or hydraulic cylinder attaching pins. Refer to steps 13, 14, and 15, in HOISTING BOOM CIRCUIT
(MAIN HYDRAULIC SYSTEM) TROUBLESHOOTING PROCEDURE.
END OF WORK PACKAGE