TROUBLESHOOTING CHART
www.gastmfg.com
ISO 9001 & 14001 CERTIFIED
inc.
Low
High
Pump
Motor
Excess
Reason and remedy
Vacuum
Pressure
Vacuum
Pressure
Overheat
Overload
Noise
for problem.
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Filter dirty. Clean or replace.
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At pump
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Muffler dirty. Clean or replace.
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Valves dirty or valves bent.
Clean or replace.
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Damaged or worn piston rings.
Repair or replace.
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Leaky relief valve.
Inspect and adjust.
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Damaged valves.
Replace.
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At pump
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Plugged vacuum/pressure line.
Inspect and repair.
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Low voltage, won’t start.
Check power source.
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Worn rings/piston hitting cylinder.
Replace.
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Cylinder misadjustment.
Realign.
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Leaky hose or check valve.
Replace.
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Dirt or liquid on top of piston.
Inspect and clean.
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Blown head gasket.
Replace.
PART NO. 70 - 2100 G441PL (REV-K)
