30
BEARING HOUSING & CONNECTING ROD REPLACEMENT
Before doing this procedure, follow the
Pressure
Relief Procedure Warning
on page 22 to reduce
the risk of a fluid injection injury , splashing in the
eyes or in the skin, injury from moving parts or elec-
tric shock.
Unplug the sprayer!
WARNING
Fig 30–1
66
8
47
48
56
69
65
63
29
A
TORQUE TO
175 IN–LB
(19 N.M)
26
31
68
C
B
67
PACKING WITH
BEARING GREASE
OIL
1
5
2
NOTE:
Stop the sprayer at the bottom of its stroke to get
the crank (A) in its lowest position.To lower the
crank manually, carefully rotate the blades of the
fan with a screwdriver.
1. Remove the lift handle (2). Hold a wrench on the
pump intake valve and unscrew the pump suction
tube. Disconnect the short hose (26) from the pump.
2. Push up the retaining spring (65). Push the pin (63)
out the rear.
3. Loosen the pump jam nut (31). Unscrew the displace-
ment pump (29).
4. Remove the four screws (48) and lockwashers (47)
from the bearing housing (66).
5. Lightly tap the lower rear of the bearing housing (66)
with a plastic mallet to loosen it from the drive housing
(8). Pull the bearing housing and the connecting rod
assembly (68) straight off the drive housing.
6. Inspect the crank (A) for excessive wear and replace
parts as needed. Evenly lubricate the inside of the
bronze bearing (C) with high quality motor oil. Liber-
ally pack the roller bearing (B) with bearing grease.
7. Assemble the connecting rod (68) and bearing hous-
ing (8).
8. Clean the mating surfaces of the bearing and drive
housings.
9. Align the connecting rod with the crank (A) and care-
fully align the locating pins in the drive housing with
the holes in the bearing housing (8). Push the bearing
housing onto the drive housing or tap it into place with
a plastic mallet.
CAUTION
DO NOT use the bearing housing screws (48) to try
to align or seat the bearing housing; the bearing and
drive housing will not align properly and will result in
premature bearing wear.
10. Install the screws (48) and lockwashers (47) in the
bearing housing. T ighten the screws evenly to
175 in–lb (19 N.m).
Fig 30–2
68
FACE OF
BEARING
HOUSING
31
TORQUE TO
70 ft–lb
(95 N.M)
65
63
66
11. Screw the displacement pump 3/4 of the way into the
bearing housing (8). Hold the pin (63) up to the pin
hole in the connecting rod (68). Screw in the pump un-
til the pin slides easily into the hole. Back off the pump
until the top threads of the pump cylinder are flush
with the face of the bearing housing and the outlet
adapter 67) is facing back. Push the retaining spring
(65) into the groove all the way around the connecting
rod. Tighten the locknut (31) very tight – about 70 ft–lb
(95 N.m) – with a 2 in. open end wrench and a light
hammer.
See Fig 30–2.
WARNING
Be sure the retaining spring (65) is firmly in the
groove all the way around, to prevent the pin (63)
from working loose due to vibration.
See Fig 30–2.
If the pin works loose, it or other parts could break off
due to the force of the pump action. These parts
could be projected through the air and result in seri-
ous bodily injury or property damage, including dam-
age to the pump connecting rod or bearing housing.
12. Install the front cover (2). Connect all hoses.
See Fig
30–1.
