Troubleshooting
3A3005C
9
Troubleshooting
Problem
Cause
Solution
Pump does not run.
Closed dispense valve.
Pump only runs with valve open.
Hydraulic supply pressure too low -
see gauge (M).
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 runs 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 leakage of lubricant from
weep tube (B), page 4 or breather,
page 10.
Worn u-cup packing (44), (Parts
page 24)
Repair.
Excessive leakage of hydraulic fluid
from weepage tube (B), page 4 or
breather, page 10.
Worn V-block packing (16), (Parts
page 24)
Repair.
Hydraulic oil leaks from fittings in the
upper or lower reciprocator blocks
(31, 32) [Parts page 24].
Fittings 1, 5, 58, (Parts, page 24), are
loose, or their o-rings are worn or
damaged.
Tighten the self-sealing fittings. If
leaking persists, change o-rings.
Leak at output pressure relief hole
(F
Wrong style fitting.
Install correct fitting.
Fitting is loose
Tighten fitting.
