Low
High
Pump
Won’t
Excess
Reason and remedy
Vacuum
Pressure
Vacuum
Pressure
Overheat
Start
Noise
for problem.
•
•
•
•
•
Filter dirty. Clean or replace.
•
•
•
•
•
Muffler dirty. Clean or replace.
•
•
Valves dirty or valves bent.
Clean or replace.
•
•
Worn cup.
Repair or replace.
•
•
•
Relief valve set too high.
Inspect and adjust.
•
•
Relief valve set too low.
Inspect and adjust.
•
•
•
•
•
•
Plugged vacuum/pressure line.
Inspect and repair.
•
•
Collapsed vacuum line.
Inspect and repair.
•
•
Low voltage, wonʼt start.
Check power source.
•
•
•
Voltage wrong.
Check power source.
•
•
•
Worn cup/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
www.gastmfg.com
ISO 9001 & 14001 CERTIFIED
PART NO. 70 - 6855 G498PL (REV-D)
8
World Headquarters
GAST Manufacturing Inc.
A Unit of IDEX Corporation
2300 M-139 Highway
Benton Harbor, Michigan 49022
Phone
269-926-6171
Fax
269-925-8288
GAST Hong Kong
Room 6,9/F
New Commerce Centre
19 On Sum St, Shatin
N. T. Hong Kong
Phone
852-2690-1066
Fax
852-2690-1012
GAST GROUP LTD
A unit of IDEX Corporation
Unit 11, The I O Centre
Nash Road
Redditch, B98 7AS
United Kingdom
Phone
+44 (0)1527 504040
Fax
+44 (0)1527 525262
For the name of the nearest authorized service facility, contact one of our offices below or visit
our website at www.gastmfg.com.