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MAGNUM 610R PUMP OPERATION / MAINTENANCE MANUAL
Erratic Cycling
Cause:
Solution:
Leaking shuttle cap.
Tighten; or remove and wrap with PTFE thread tape prior
to tightening.
Fluid supply line restricted (cavitation).
Reduce fluid restriction.
Reduce distance, height of suction head.
Increase diameter of suction supply line (reduces
restriction).
Fluid supply line pressure.
Adjust check muffler assembly (see 0).
Pilot valve not seating.
Check pilot valve function and seal.
Additional TFE thread tape on pilot valve threads.
Pilot valve transfer O-rings leaking.
Check diaphragm hole alignment. Replace O-ring seals.
Check ball(s) not seating.
Replace check balls and O-rings.