Repair - Graco EM 490 Instructions-Parts List Manual

WARNING
To reduce the risk of serious bodily injury, including
fluid injection; splashing in the eyes; injury from
moving parts or electric shock, always follow the
Pressure Relief Procedure W arning on page 11
before continuing.
NOTE: See Fig 15.
1 Remove pump as described on page 19.
2 Remove the screws (19) and the cover (35). Remove
the screws (20) and slide the connecting rod and
bearing assembly (A) off the crankshaft (B).
3 Use a screwdriver to push the retaining spring (33) up
and remove the pin (34) from the coupling (36). Re-
move the coupling from the connecting rod (54).
4 Pull the connecting rod (54) out of the bearing (53).
Wipe off these parts; do not use solvent. Inspect the
surfaces of the bearing and connecting rod link for
wear or damage. If either part needs replacing, re-
place both. When installing the rod and bearing, coat
the surfaces with SAE 10 non–detergent motor oil.
5 Clean and inspect the crankshaft. Wipe it clean with a
rag; do not use solvent. If the crankshaft (B) is badly
worn, replace the drive assembly (55) as described
on page 14.
6 Clean and inspect the connecting rod needle bearing
(C). Repack the bearing with industrial grade, heavy
duty, extreme-pressure lithium soap grease.
NOTE: After every 100 hours of operation, or whenever
servicing the pump (whichever comes first), fill
the cavity (D) in the connecting rod (54) with SAE
10 non–detergent motor oil.
7 Assemble the new rod and bearing, being sure to
push the spring (33) down in place over the pin (34)
ends, and install the remaining parts in the reverse
order.
CONNECTING ROD and BEARING
C
54
53
33
36
A
34
35
19
Fig 7–15
D
LUBRICATE:
See NOTE at
lower left
55
B
18
20
0075