Bearing Housing And Connecting Rod - Graco 231-316 Series C Instructions Manual

Bearing Housing and Connecting Rod

WARNING
INJECTION HAZARD
To reduce the risk of serious injury,
whenever you are instructed to relieve
pressure, follow the Pressure Relief
Procedure on page 10.
NOTE: Steps 1 to 13 refer to Fig. 7.
1. Remove the front cover and screws (7,78).
2. Remove the spring clips (49,52) and the drain
hose (51). Unscrew the suction tube (50) from the
pump, holding a wrench on the pump intake valve
(423) to keep the pump from loosening.
3. Disconnect the hose (63) from the pump.
4. Use a screwdriver to push aside the retaining
spring (13) at the top of the pump. Push the pin
(12) out the rear.
5. Loosen the jam nut (14) with an adjustable
wrench. Unscrew and remove the displacement
pump.
6. Use a hex key wrench to remove the four screws
(72) and lockwashers (73) from the bearing hous-
ing (11).
7. While pulling the connecting rod (8) with one hand,
lightly tap the lower rear of the bearing housing
(11) with a plastic mallet to loosen it from the drive
housing (5). Pull the bearing housing and the con-
necting rod assembly (8,11) off the drive housing.
8. Inspect the crank (D); replace the drive housing if
the crank is worn excessively.
9. Evenly lubricate the inside of the bronze bearing
(A) in the bearing housing (11) and the inside of
the connecting rod link (B) with high-quality motor
oil. Liberally pack the roller bearing (C) in the con-
necting rod (8) with bearing grease.
10. Assemble the connecting rod (8) and bearing
housing (11).
11. Clean the mating surfaces of the bearing housing
(11) and drive housing (5).
12. Align the connecting rod (8) with the crank (D) and
carefully align the locating pins (E) in the drive
housing (5) with the holes in the bearing housing
(11). 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.
13. Install the screws (72) and lockwashers (73) on the
bearing housing. Tighten evenly to 300 in-lb (34
N.m).
14. Refer to Installing the Pump on page 24 to install
the pump.
Torque to 300 in-lb (34 N.m)
Lubricate with high-quality motor oil
Pack with bearing grease
C
B
A
73
72
7
78
12
14
423
50
Fig. 7
5
D
10
4
8
11
E
13
63
52
51
49
02693
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