MAIN HYDRAULIC PUMP TEST
Before performing any troubleshooting in bowl, move the
ejector forward and disable it by disconnecting ejector cylinder
from hydraulic system. Failure to comply may result in severe
injury or death to personnel.
Ensure globe valve is fully opened prior to starting vehicle. A
fully or partially closed valve will cause immediate high pressure.
Failure to comply may result in injury or death to personnel and
damage to equipment.
Have a suitable container ready to catch oil.
Disable ejector from hydraulic system by disconnecting CONT VLV-21 hose (1) from
elbow (2) at port 21 and CONT VLV-22 hose (3) from elbow (4) at port 22 on ejector
control valve. Cap plug hoses and fittings.
Install coupling tube (5), globe valve (6), tee (7), and pressure measuring device (8)
between HYDR FLTR-IN-13R hose (9) and high-pressure filter inlet port 13R.
Have assistant start engine and allow engine to idle (750-800 rpm). Slowly close globe
valve (6) until pressure reaches 3,950-4,050 psi (27,235-27,925 kPa).
Open globe valve (6). Stop engine; relieve hydraulic pressure.
Notify Direct Support maintenance.