Idex TREBOR 110R, Operation & Maintenance Manual, Page: 21 / 23

MODEL 110R PUMP OPERATION / MAINTENANCE MANUAL PAGE 21
Erratic Cycling
Cause: Solution:

Leaking shuttle cap.

Tighten; or remove and wrap with TFE 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 Section 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.