Bearing Housing & Connecting Rod - Graco EM 5000 Instructions-Parts List Manual

Bearing Housing & Connecting Rod
WARNING
To reduce the risk of serious injury, including fluid
injection or splashing in the eyes or on the skin, or
injury from moving parts, always follow the Pres-
sure Relief Procedure Warning on page 6
before checking, adjusting, cleaning, or shutting of
the sprayer. Unplug the power supply cord!
NOTE: Refer to Fig 19 for this procedure.
Disassembly
1. Remove the front cover and screws (23,68). Re-
move the spring clips (100,102) and the bypass hose
(101).
2. Disconnect the pump outlet hose (59) from the dis-
placement pump outlet nipple (49).
3. Use a screwdriver to push aside the retaining spring
(26) at the top of the pump. Push the pin (25) out the
rear.
4. Loosen the jam nut (27) with an adjustable wrench.
Unscrew and remove the displacement pump.
5. Use a hex key wrench to remove the four screws (73)
and lockwashers (74) from the bearing housing.
6. While pulling the connecting rod (22) with one hand,
lightly tap the lower rear of the bearing housing (21)
with a plastic mallet to loosen it from the drive hous-
ing (20). Pull the bearing housing and the connecting
rod assembly (22) off the drive housing.
Reassembly
1. Evenly lubricate the inside of the bronze bearing (C)
in the bearing housing (21), and the inside of the con-
necting rod link (D), with high–quality motor oil. Liber-
ally pack the roller bearing (E) in the connecting rod
assembly (22) with bearing grease.
2. Insert the connecting rod (22) into the bearing hous-
ing (21).
3. Clean the mating surfaces of the bearing and drive
housings (21 and 20).
4. Align the connecting rod with the crank (A) and care-
fully align the locating pins (F) in the drive housing
(20) with the holes in the bearing housing (21). Push
the bearing housing onto the drive housing or tap it
into place with a plastic mallet.
CAUTION
DO NOT use the bearing housing screw (73) to align
or seat the bearing housing with the drive housing.
These parts must be aligned using the locating pins
(F), to help avoid premature bearing wear.
5. Install the screws (73) and lockwashers (74) on the
bearing housing. Tighten evenly to16–18 N.m.
procedure continued on page 20
20
A
22
E
D
74
73
TORQUE TO
(16–18 N.m)
68
23
21
26
25
27
Fig. 19
11
F
24
C
59
49
100
101
102