Graco Lube Master, Instructions Manual

Page: 14 / 44

Troubleshooting
14 3A2781B
Troubleshooting
1. Follow Pressure Relief Procedure , page 13,
before checking or repairing the pump.
2. Check all possible problems and causes before
disassembling the pump, including loose
connections or air trapped in the system.
Problem Cause Solution
No lubrication is dispensed from pump,
but pump is rotating
Reservoir is empty
Refill as required. See Filling The Res-
ervoir, page 9.
Check valve is defective
Clean and install seal repair kit.
Adjustment sleeve seals are defective
Problem is in the pump
See Pump is Not Running or Requires
Servicing section of this Troubleshoot-
ing Table.
Pump is Not Running or Requires Ser-
vice
Yoke connector pin and piston are
defective Replace defective parts using Pump
Drive Repair Kit.
Sheared drive motor key Replace key.
Broken pump drive shaft
Replace defective parts using Pump
Drive Repair Kit.
Piston is not engaged in sleeve
Replace defective parts using Output
Manifold Kit.
No lubrication is dispensed from pump
and drive shaft is not rotating
Motor is not running
Refer to Motor is Not Running section
of this Troubleshooting Table.
No gear reducer output
Refer to No Gear Reducer Output sec-
tion of this Troubleshooting Table.
Defective pump input shaft
Replace defective parts using Pump
Drive Repair Kit.
Motor is Not Running
Power is off Turn power on.
Electric connections to motor or timer
are loose Check all connections and tighten
securely.
Timer/controller is set incorrectly or
defective
Set timer/controller to correct setting. If
unit is still not functioning, repair or
replace timer/controller.
No Gear Reducer Output
Key is sheared or missing at coupling Replace key.
Defective gearbox
Gearbox must be replaced. For this
repair unit must be returned to an
authorized Graco repair facility.