Trebor 55E EVOLVE - Manual (Page 25)

EVOLVE 55E PUMP OPERATION / MAINTENANCE MANUAL PAGE 25
5
TROUBLESHOOTING
Pump Will Not Start, Fails to Operate
Cause: Solution:

Insufficient air pressure.

Must be minimum 15 psi at pump air hook-up.

Air lines not attached properly.

Check external controller.

Insufficient air volume (low supply pressure during
running).

See Performance Charts (Figure 3-1) for requirements.
Check for both regulator and control valve capabilities.

Fluid discharge line blocked. Downstream valve
closed, filter plugged or other obstruction.

Remove obstruction.

Probe failure

Check fiber optic probes for correct operation.

Check external controller.

Check for excessive bends in fiber optic cable.

Clean or trim fiber optic cable at the sensor.
Bubbles in Fluid Discharge
Cause: Solution:

Leaking fluid inlet fitting.

Replace adapter seal.

Leaking main seal.

Tighten union nut to 125 ft-lbs.

Replace diaphragms

Check head and body seal grooves for nicks or scratches.

Pump inlet line pressure reached saturation point
(due to high suction requirement).

Increase diameter of suction supply line (reduces
restriction).

Reduce output flow.

Ruptured (perforated) diaphragm.

Replace diaphragms.

Check bore caps leaking.

Tighten check bore caps

Replace seals.
Fluid Leaks
Cause: Solution:

Union nut torque low

Tighten union nuts to 125 ft.-lbs.

Leaking main seal.

Replace diaphragms.

Check head and body seal grooves for nicks or scratches.

Check bore cap.

Tighten cap

Remove and replace seal.

Ruptured diaphragm(s)

Replace diaphragms, and any parts that may have been
damaged by fluid exposure.
Erratic Cycling
Cause: Solution:

Air line or fittings leak in external controller.

Replace tubing or tighten fittings.

Replace controller.

Suction line restricted (cavitation).

Reduce fluid restriction.

Quick exhaust seal not sealing.

Inspect for particles between seal and port. Replace seal.

Check ball(s) not seating.

Inspect check assembly for damage; replace if necessary.

Make sure check balls move freely in sleeves.

Transfer tube leaking.

Tighten transfer tubes and quick grip nuts as described in
Section 4.8.a.