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312349G 13
Service
Use only Genuine Graco Repair Parts.
See separate system component manuals for service
instructions. For pump service see manual 312350. For
vent valve service see manual 309099.
Troubleshooting
Problem Cause Solution
System does not build sufficient
pressure.
Pump malfunction. Refer to manual 312350.
Pump turned off too soon. Increase timer “pump on” setting.
Increase hydraulic flow rate to pump.
Solenoid malfunction. Repair or replace solenoid.
Too low or no hydraulic supply. Turn pressure up or supply on.
Vent valve seal failure. Replace seal.
Vent valve needle/seat failure. Replace needle and seat.
Reservoir out of grease. Fill reservoir.
Broken or leaky supply/branch line. Tighten connections and/or replace
line(s).
Injector failure. Repair or replace injector.
Pressure in tank line too high due to
restrictions in tank line or plumbing
too small.
Remove tank line restrictions.
Use larger plumbing.
Lubricant dispensed from pressure
relief valve.
System pressure set too high. Decrease hydraulic pressure to
pump.
Pump runs too fast. Reservoir out of lubricant. Fill reservoir.
Pump cavitation. Install a follower plate.
Leak in distribution system. Repair leak.
Lubricant coming out of breather. Reservoir overfilled. Drain lubricant until overflow stops.
Pump will not start. No hydraulic supply. Verify/check hydraulic supply.
Solenoid malfunction. Replace solenoid.
No electrical supply to lubrication
controller.
Turn on electrical supply.
Lubrication controller malfunction. Refer to controller manual 308950.
Pump malfunction. Refer to pump manual 312350.