Gast 20R Series - Manual (Page 7)

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 damaged.
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.
• • • 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.
TROUBLESHOOTING CHART
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For repair parts ordering information and exploded product view, visit our website or call
us at the number listed below.
We have Gast Authorized Repair Facilities throughout the world. For the most up-to-
date listing, contact one of our sales offices below:
Gast Manufacturing, Inc.
P.O. Box 97
2300 S. Highway M139
Benton Harbor, MI 49023-0097
Ph: 269/926-6171
FAX: 269/925-8288
www.gastmfg.com
Gast Group Limited, United
Kingdom
Unit 11, The I O Centre
Nash Road
Redditch, B98 7AS
United Kingdom
ph: +44 (0) 1527 504040
Fax: +44 (0) 1527 525262
www.gastmfg.com
Gast Hong Kong
Room 6,9/F
New Commerce Centre
19 on Sum Street, Shatin
N. T. Hong Kong
Ph: (852) 2690 1066
Fax: (852) 2690 1012
www.gasthk.com