Troubleshooting - Graco Dyna-Star 247540 Instructions, Repair And Parts

Troubleshooting

Troubleshooting
Problem
Pump does not run.
Pump speeds up or runs erratically.
Pump runs but output low on up
and/or down stroke.
Pump run but output low on both up
and down strokes.
Excessive weepage from weep tube
(B), page 4.
Hydraulic oil leaks from fittings in
the upper or lower reciprocator
blocks (31, 32) [Parts page 23].
8
Cause
Closed dispense valve.
Pressure too low.
Insufficient hydraulic fluid supply.
Clogged fluid outlet line, intake
valve, dispense valve, suction line.
Reciprocator damaged.
Pump piston and/or intake valve
worn.
Empty supply container.
Pump piston and/or intake valve
worn.
Insufficient hydraulic fluid supply.
Pressure too low.
Clogged fluid outlet line, intake
valve, dispense valve, suction line.
Worn throat packings.
Worn displacement seal.
Fittings 1, 5, 58, (Parts, page 23),
are loose, or their o-rings are worn
or damaged.
Solution
Pump only runs with valve open.
Increase supply pressure using a
pressure adjusting valve.
Check hydraulic supply. Adjust to a
maximum of 3 gpm (11 lpm) flow.
Relieve pressure, page 5. Check.
Clear obstructions.
Repair.
Relieve pressure, page 5. Check
and repair.
Refill and repair. Do not allow pump
to run dry. Monitor closely or use a
low-level cutoff valve.
Relieve pressure, page 5. Check
and repair.
Check hydraulic supply. Adjust to
maximum 3 gpm (11 lpm) flow.
Increase supply pressure using a
pressure adjusting valve.
Relieve pressure, page 5. Check.
Clear obstructions.
Repair.
Repair.
Tighten the self-sealing fittings. If
leaking persists, change o-rings.
312350L