Graco LubeMaster, Instructions Manual

Page: 15 / 44

Troubleshooting
3A2781A 15
Clutch drive is operating but there is
no flow
Reservoir is empty
Refill as required. See Filling The
Reservoir, page 9.
Clutch is defective
Remove clutch and operate pump
manually.
• 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 Servic-
ing section of this Troubleshoot-
ing 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 Bleed-
ing, page 11.
Pump seals, check valves or o-rings
are defective Replace defective parts using Pump
Drive Repair Kit.
Pump adjustment assembly is leak-
ing or sucking air during return stroke Tighten output manifold block assem-
bly components.
Piston or bore is worn
Replace defective parts using Out-
put Manifold Kit.
Grease Models
Lubricant is leaking from the reser-
voir
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 sup-
ply 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).
Problem Cause Solution