Troubleshooting - Graco 309015B Design Manual

Problem
System does not build sufficient
pressure
Injectors do not dispense to bear-
ing
Injector indicator pin does not
move when system builds up
pressure
Bearing receives too much lubri-
cant
24 309015

Troubleshooting

Cause
Pump malfunction
Pump turned off too soon
Solenoid valve malfunction
Too low or no power supply
Vent valve seal failure
Vent valve needle/seat failure
Reservoir out of grease
Broken or leaky supply/branch line
Feed line blocked
Bearing plugged
Feed line leaks or is broken off
System does not build sufficient pres-
sure
Air trapped in supply/branch/feed line
Injector failure
Injector failure
Feed line blocked
Bearing plugged
Seal stiction (static friction)
Improper injector setting
Injector failure
Solution
Refer to pump manual 308955 or
309098
Increase timer "pump on" setting
Repair or replace
Turn power supply pressure up or
supply on
Replace seal
Replace needle and seat
Fill reservoir
Tighten connections and/or replace
line(s)
Replace line
Flush and clean bearing
Tighten connections and/or replace
line
See "System does not build sufficient
pressure", above.
Bleed air from line
Repair or replace injector
Repair or replace injector
Replace line
Flush and clean bearing
Screw the output adjustment screw in
and out to break the injector piston
free.
On a new installation, priming the
bearing feed line with a grease gun
on the injector zerk can also relieve
seal stiction.
Adjust injector setting by turning
down the adjustment screw
Repair or replace injector