Graco Dyna-Star 224741, Instructions Manual

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Troubleshooting
10 308155U
Troubleshooting
1. Follow Pressure Relief Procedure , page 8, before
checking or repairing gun.
2. Check all possible problems and causes before dis-
assembling gun.
Problem Cause Solution
Pump won’t 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. Check; clear
obstruction.
Reciprocator damaged Repair. See page 11.
Pump speeds up or runs erratically
Pump piston and/or intake valve is
worn Relieve pressure. Check and repair.
See page 11
Empty supply container.
Refill and reprime. 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. Check and repair.
See page 11.
Pump runs but output low on both
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 Relive pressure. Check; clear
obstructions.
Excessive weepage from weep tube
(B)
Worn throat packings Repair. See page 11.
Hydraulic oil leaks from fittings in
the upper or lower reciprocator
blocks (31, 32)
Fittings (1, 5, 58) are loose, or their
o-rings are worn or damaged Tighten the self sealing fittings. If
leaking persists, change the o-rings.