307-84718
Bearing
Housing & Connecting Rod
WARNING
To
reduce the risk of
serious injury
, including fluid in
-
jection
always follow the
Pressure Relief Procedure
Warning on page 14 before checking, adjusting,
cleaning or shutting off the sprayer.
Disconnect the
spark
plug!
NOTE:
Steps 1 to 13 refer to Fig. 6.
1.
Remove the front cover and screws (23,68).
2. For upright models only:
Remove the spring clips
(112, 114) and the drain hose (113). Unscrew the
suction
tube (30) from the pump, holding a wrench on
the pump intake valve (B) to keep the pump from
loosening.
3. Disconnect the pump outlet hose (59) from the dis-
placement
pump outlet nipple (92).
4. Use
a screwdriver to push aside the retaining
spring
(26)
at the top of the pump. Push the pin (25) out the
rear.
5. Loosen the jam nut (27) with an adjustable wrench.
Unscrew
and remove the displacement pump.
6. Use
a
hex key wrench to remove the four screws (73)
and
lockwashers (74) from the bearing housing (21).
7. 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) of
f the drive housing.
8. Inspect
the crank (A) for excessive
wear and replace
parts
as needed.
9. 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.
10. Assemble
the connecting rod (22)
and bearing hous
-
ing (21).
11. Clean the mating surfaces of the bearing and drive
housings.
12. 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
.
13. Install the screws (73) and lockwashers (74) on the
bearing housing. Tighten evenly to 300 in–lb (34
N.m).
14. Refer
to
Installing the Pump
on page 31.
Fig. 6
73
27
22
114
113
112
0149
30
25
23
68
26
21
59
92
D
E
A
F
20
74
B
C
Torque
to
300 in–lb
(34 N.m)
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