14 Relief Valve Removal, Cleaning & Replacement
RELIEF VALVE REMOVAL,
CLEANING AND REPLACEMENT
WARNING: Never disconnect any hy-
draulic line or fitting with the unit in
the raised position. Always lower the
unit and relieve pressure before removing
any lines or caps. Allow the system to cool
down before draining oil or handling system
components. Serious burns can result from
contact with hot oil.
PHOTO NO. 1000294A
Remove the cap with a 1” wrench.
Remove the valve adjustment screw with a
straight slot screwdriver. Remove spring.
Remove the ball with a pencil magnet. Inspect
the spring, ball, and seat in the end head for
contamination, distortion, or wear.
Flush out end head with clean hydraulic oil.
BALL
O-RING
SPRING
ADJ. SCREW
VALVE CAP
DWG NO. 3516
Re-install the ball, spring and adjustment screw.
The adjustment screw should be turned in ap-
proximately 5-6 full turns.
Check O-ring in cap for cuts and replace as nec-
essary. (P/N 25010518).
Install cap, ensuring that the O-ring is in cap
groove. Tighten cap with 1” wrench.
Adjust relief pressure. See “Adjustable Relief
Valve, Testing and Adjustment.” Page 31-32.
