Service
16
3A3429C
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 pres-
sure.
Pump (B) malfunction.
Refer to manual 312350.
Pump (B) turned off too soon.
Increase lubrication controller (F)
“pump on” setting.
Increase hydraulic flow rate to pump
(F).
Solenoid (JJ) malfunction.
Repair or replace solenoid (JJ).
Too low or no hydraulic supply.
Turn pressure up or supply on.
Vent valve (L) seal failure.
Replace seal.
Vent valve (L) needle/seat failure.
Replace needle and seat.
Reservoir (K) out of grease.
Fill reservoir (K).
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 (B) runs too fast.
Reservoir (K) out of lubricant.
Fill reservoir (K).
Leak in distribution system.
Repair leak.
Lubricant coming out of breather (J). Reservoir (K) overfilled because
Auto-Fill Shut Off (S) did not shut the
refilling line (D).
Replace the Auto-Fill Shut Off (S)
diaphragm (9) and Auto-Fill Shut Off
valve (8).
