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20
REPLACING
THE CONNECTING ROD and BEARING
To
reduce the risk of serious
bodily injury
, including
fluid injection or splashing in the eyes or on the
skin,
or injury from moving parts, always follow the
Pressure
Relief Procedure W
arning
on page 16
before
checking, adjusting, cleaning or shutting of
f
the
sprayer
.
Unplug the power supply cord.
WARNING
NOTE: Refer
to Fig 20–1 for this procedure unless other
-
wise
instructed.
1.
Remove the displacement pump. See page 18.
2.
Remove the front cover (35).
3.
Remove the bearing housing screws (20).
4. Slide
the bearing and
connecting rod assembly (A) of
f
the
crankshaft (B).
5. Use a screwdriver to push the retaining spring (33)
up.
Remove the pin (34) and the coupling (36).
6. Clean
and inspect the bearing housing (53) and con
-
necting
rod (54), including
the needle bearing (D). Re
-
place
both parts if either is worn or damaged.
7. Clean
and
inspect the crankshaft (B). Wipe the crank
-
shaft
clean with a rag (don’t
use solvent). If the crank
-
shaft
is badly worn, replace the drive assembly (55).
See
page 21.
To extend the service life of the connecting rod
bearing,
lubricate it properly
. After every 100 hours
of operation, or whenever servicing the pump
(whichever
comes first), fill the cavity (E) in the con
-
necting
rod (54) with SAE
non–detergent motor oil.
CAUTION
8. Coat the surfaces of the new connecting rod and
bearing
(C) with SAE non–detergent motor oil. Liber
-
ally
pack the needle bearing (D) with
industrial-grade,
heavy-duty,
extreme-pressure, lithium-soap grease.
9. Assemble the connecting rod (54) and bearing (53).
Assemble
the coupling (36)
to the connecting rod and
install the pin (34). Push the spring (33) over both
ends
of the pin (34).
10. Align
the connecting rod (54) with the crankshaft (B)
and
push the bearing housing (A) onto the drive
hous
-
ing
(55). Assemble the remaining parts.
53
Fig 20–1
55
18
20
19
34
36
33
LUBRICATE:
See CAUTION
54
A
B
C
D
E
0075
35