8
Low
High
Pump
Motor
Excess
Reason and remedy
Vacuum
Pressure
Vacuum
Pressure
Overheat
Overload
Noise
for problem.
•
•
At Pump
•
•
Filter dirty. Clean or replace.
•
•
At pump
•
•
Muffler dirty. Clean or replace.
•
•
Valves dirty or valves bent.
Clean or replace.
•
•
Worn piston rings.
Repair or replace.
•
•
•
Relief valve set too high.
Inspect and adjust.
•
•
Relief valve set too low.
Inspect and adjust.
•
•
At pump
At pump
•
•
Plugged vacuum/pressure line.
Inspect and repair.
•
At pump
Collapsed vacuum line.
Inspect and repair.
•
•
Low voltage, wonʼt start.
Check power source.
•
•
•
Voltage wrong.
Check power source.
•
•
•
Worn rings/piston hitting cylinder.
Replace.
•
•
Cylinder misadjustment.
Realign.
•
•
Leaky hose or check valve.
Replace.
•
•
•
•
•
Dirt or liquid on top of piston.
Inspect and clean.
•
•
•
•
Motor not wired correctly.
Check wiring diagram/line voltage.
•
•
•
Blown head gasket.
Replace.
TROUBLESHOOTING CHART
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PART NO. 70 - 3000 G442PL (REV-J)
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P.O. Box 97
2300 Highway M139
Benton Harbor, MI 49022
Ph: 269/926-6171
FAX: 269/925-8288
www.gastmfg.com
Gast Hong Kong
Room 6,9/F.
New Commerce Centre19
on Sum St, Shatin
N. T. Hong Kong
Ph: (852) 2690 1008
Fax: (852) 2690 1012
www.gasthk.com
Gast Group Ltd.
A Unit of IDEX
Corporation
Unit 11, The I O Centre
Nash Road
Redditch, B98 7AS
United Kingdom
Ph: +44 (0)1527 504040
Fax +44 (0)1527 525262
