Graco Lube Master, Instructions Manual

Page: 18 / 44

Maintenance and Repair
18 3A2781B
Reassembly
Lubricate the follower cups (15 and 17) (F
IG
. 11) and the
inner diameter of the reservoir tube (11) before reas-
sembling the pump assembly with the same lubricant
used in the system.
1. Slide the reservoir (11) over the follower cups (15
and 17) upwards until it contacts the reservoir cap
(9), being careful not to distort the follower cup lips.
2. Install a new gasket (8) on the pump.
3. Place the reservoir (11) on the gasket (8) and rotate
the reservoir cap (9) until the holes in the cap line up
with the holes in the pump.
4. Install the tie rods (3) through the holes in the reser-
voir cap (9) and pump.
5. Install lock washers (5) and hex nuts (1) onto the tie
rods (3) and torque to 5 ft-lbs (6.78 N•m).
6. Install the fill stud (13) and dust cap (12) in the
pump.
NOTE: After reassembly, any components removed to
ease disassembly should be reinstalled on the reservoir.
Low-Level Switch Assembly
Refer to F
IG
. 12 for reference numbers used in the fol-
lowing instructions.
If the grease level is too low and the switch assembly
fails to perform as required:
• check that the electrical connections are secure.
• check for any physical obstructions that prevent the
switch from operating. If an obstruction is found, dis-
assemble the unit and clear the obstruction.
If the switch assembly is damaged, replace it using the
following procedure:
Remove
1. Follow Prepare for Maintenance , page 16.
2. Disconnect the wiring from the low-level switch ter-
minals (304) (F
IG
. 13).
3. Remove the nuts attaching the low-level switch
(304) to the bracket (A) (F
IG
. 12).
4. Remove the low-level switch (304) from the bracket
(A).
5. Remove the retainer ring (B) and spring (C).
6. Remove the three screws (D) and the bracket (A).
Install
1. Attach the bracket (A) to the grease reservoir cover
using the three screws (D) (F
IG
. 12).
2. Place the spring (C) (F
IG
. 12) over the tip of the level
indicator.
3. Compress the spring (C) and place the retainer ring
(B) between the spring and the tip of level indicator
(F
IG
. 12).
4. Attach the low-level switch (304) to the bracket (A)
with the nuts (F
IG
. 12).
5. Wire the low-level switch (304) in accordance with
local electrical codes. Refer to wiring diagram, F
IG
.
13.
A Normally closed
B Normally open
C Common
F
IG
. 12:
F
IG
. 13: Low-Level Switch Wiring
304
A
B
D
C
Nuts
Level Indicator
A
B
C