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Troubleshooting
312350E 9
Troubleshooting
Problem Cause Solution
Pump does not run. Closed dispense valve. Pump only runs with valve open.
Pressure too low. Increase supply pressure using a
pressure adjusting valve.
Insufficient hydraulic fluid supply. Check hydraulic supply. Adjust to a
maximum of 3 gpm (11 lpm) flow.
Clogged fluid outlet line, intake valve,
dispense valve, suction line.
Relieve pressure, page 7. Check.
Clear obstructions.
Reciprocator damaged. Repair.
Pump speeds up or runs erratically. Pump piston and/or intake valve
worn.
Relieve pressure, page 7. Check
and repair.
Empty supply container. Refill and repair. Do not allow pump
to run dry. Monitor closely or use a
low-level cutoff valve.
Pump runs but output low on up
and/or down stroke.
Pump piston and/or intake valve
worn.
Relieve pressure, page 7. Check
and repair.
Pump run but output low on both up
and down strokes.
Insufficient hydraulic fluid supply. Check hydraulic supply. Adjust to
maximum 3 gpm (11 lpm) flow.
Pressure too low. Increase supply pressure using a
pressure adjusting valve.
Clogged fluid outlet line, intake valve,
dispense valve, suction line.
Relieve pressure, page 7. Check.
Clear obstructions.
Excessive weepage from weep tube
(B), page 4.
Worn throat packings. Repair.
Worn displacement seal. Repair.
Hydraulic oil leaks from fittings in the
upper or lower reciprocator blocks
(31, 32) [Parts page 18].
Fittings 1, 5, 58, (Parts, page 18), are
loose, or their o-rings are worn or
damaged.
Tighten the self-sealing fittings. If
leaking persists, change o-rings.