APRON CONTROL VALVE PRESSURE TEST
Before performing any hydraulic troubleshooting in bowl, move
ejector forward and disable it by disconnecting ejector cylinder
from hydraulic system. Failure to comply may result in severe
injury or death to personnel.
Have suitable container ready to catch oil.
Move ejector forward, stop engine, and relieve hydraulic pressure.
Disable ejector from the hydraulic system by disconnecting CONT VLV-21 hose (1) from
elbow (2) at port 21 of ejector control valve and CONT VLV-22 hose (3) from elbow (4) at
port 22. Cap and plug hoses and fittings.
Disconnect CONT VLV-19 hose (5) from elbow (6) at port 19 on apron control valve.
Connect pressure measuring device (7) to elbow (6). Plug hose (5).
Have assistant start engine and hold APRON CONTROL lever in UP position. Read
pressure measuring device (7)
RELIEF VALVE ADJUSTMENT
As assistant holds APRON CONTROL lever in UP position, loosen jamnut (8) on apron, raise
relief valve (9), rotate valve (9) clockwise to increase pressure and counterclockwise to
decrease pressure, until hydraulic pressure is at a minimum 3,500 psi (24,131 kPa). Stop
engine; relieve hydraulic pressure. Remove all test equipment and connect hoses.
Refer to TM 5-2350-262-20-2.