Graco Lube Master, Instructions Manual

Page: 15 / 44

Troubleshooting
3A2781B 15
Clutch drive is operating but there is no
flow
Reservoir is empty
Refill as required. See Filling The Res-
ervoir, page 9.
Clutch is defective
Remove clutch and operate pump man-
ually.
•
If there is output, replace clutch. For
this repair unit must be returned to
an authorized Graco repair facility.
•
If there is no output, see Pump is
Not Running or Requires Servicing
section of this Troubleshooting
Table.
Fluid temperature is below 12°F
(-11°C) Do not attempt to operate until tem-
perature problem is corrected.
Erratic pump output
System was not bled properly
Bleed manifold. See Manifold Bleeding,
page 11.
Pump seals, check valves or o-rings
are defective Replace defective parts using Pump
Drive Repair Kit.
Pump adjustment assembly is leaking
or sucking air during return stroke Tighten output manifold block assembly
components.
Piston or bore is worn
Replace defective parts using Output
Manifold Kit.
Grease Models
Lubricant is leaking from the reservoir
Hex nuts (1) are not tight
Tighten hex nuts (1). Torque to 5 ft. lbs
(6.78 N•m).
Damaged or worn gasket (8) Replace gasket (8).
Cracks or nicks in reservoir tube (11) or
reservoir is dented or out-of-round
Replace reservoir tube (11).
Restricted movement of follower plate
Dented or out-of-round reservoir tube
(11)
Replace reservoir tube (11).
Pump will not take a prime
Grease will not pull into pump through
quick disconnect
Inject several ounces of heavy oil
through the grease fill quick discon-
nect. The pump will then prime on oil,
pulling the grease behind it. If it
becomes necessary to use this
method, all injected oil should be dis-
charged at the loosened system supply
connection along with any air.
Oil Models
Oil reservoir is filling very slowly
Fill screen (31) located in fill cap (30) is
clogged
Clean or replace fill screen (31).
Lubricant is leaking from the reservoir
Hex nuts (1) are not tight
Tighten hex nuts (1). Torque to 5 ft. lbs
(6.78 N•m)
Damaged or worn gasket (8) Replace gasket (8)
Cracks or nicks in reservoir tube (11) or
reservoir is dented or out-of-round
Replace reservoir tube (11)
Overhead supply adapter only:
Exceeded recommended inlet pressure
of 15 psi (0.103 MPa, 1.03 bar)
Decrease pressure to 15 psi (0.103
MPa, 1.03 bar) or less
Problem Cause Solution