TROUBLESHOOTING
POOR HYDRAULIC SYSTEM PERFORMANCE OR FAILURE
CAUSE REMEDY
Dirt in relief valve .................................................................................Disassemble and clean.
Relief valve defective............................................................................See section on “Relief Valves”.
Load too heavy......................................................................................Check line pressure.
Internal valve crack...............................................................................Replace valve.
Plunger not at full stroke .......................................................................Check movement of spool.
CAN’T GET PRESSURE
CAUSE REMEDY
Poppet stuck open or dirt under seal .....................................................Check for foreign matter between poppets and their
mating members. Members must slide freely.
ERRATIC PRESSURE
CAUSE REMEDY
Poppet seal damaged.............................................................................Replace damaged parts. Clean dirt and remove sur-
face marks for free movement.
PRESSURE SETTING NOT CORRECT
CAUSE REMEDY
Wear due to dirt. Lock nut adj. screw loose.........................................See section on “Valve Adjustments”.
RT700 Series Page 5 - 25 Issued: August 2003
RELIEF VALVES
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