TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
MAIN CONTROL VALVE TEST AND ADJUSTMENT - CONTINUED
Start engine (TM 5-3800-205-10-1 or TM 5-
3800-205-10-2) and run at 825 RPM.
Completely raise bowl/water tank (TM 5-
3800-205-10-1 or TM 5-3800-205-10-2).
Increase engine RPM to 2450.
Slowly move control lever for bowl/water tank to UP and hold for no more than 5 seconds. Correct pressure
indication should be 2500 psi (17237 kPa).
If pressure indication is not correct, relief valve must be adjusted as follows:
Remove locking plug and O-ring from relief valve. Discard O-ring.
Loosen locknut. Turn adjustment screw clockwise to increase pressure or counterclockwise to
Tighten locknut after adjustment is completed.
Coat new O-ring with clean oil and install O-ring in locking plug.
Install locking plug on relief valve.