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308-125 23
Drive
Housing
WARNING
To
reduce the risk of serious injury
, always follow
the
Pressure Relief Procedure
on page 8 before
repairing the sprayer
.
NOTE:
Refer to Fig. 19 for this procedure.
1. Disconnect the suction hose (A). Disconnect the
pressure control cord (62). Remove the front cover
(21).
2. Disconnect
the pump outlet hose.
3. Remove the four screws (48) and lockwashers (49)
from
the bearing housing (23).
4. Lightly
tap the back of the bearing
housing (23) with
a plastic mallet. Pull the pump, bearing housing and
connecting
rod away from the drive housing (20)
as
one
assembly
.
5. Remove the bearing housing screws (41) and the
pinion
housing screws (3).
6. Lightly
tap around the drive housing (20) with a plas
-
tic
mallet to loosen it from the pinion housing (19p).
CAUTION
Do not drop the gear cluster (1) when removing the
drive
housing (20). The
gear cluster is easily damaged.
The
gear may
stay engaged in either the drive housing
or
the pinion housing.
Do not lose the thrust balls (20c and 19k) located at
each
end of the gear cluster
. The balls, which are
heavi
-
ly covered with grease, usually stay in the shaft re-
cesses,
but they could be dislodged. If they are caught
between the gears and not
removed, the balls will seri
-
ously
damage
the drive housing. If the balls are not in
place, the bearings will wear prematurely
.
7. Liberally
apply bearing grease (20d,
supplied) to the
gear cluster (1). Be sure the thrust balls (20c and
19k)
are in place.
8. Place
the bronze colored washer (20a)
and then the
silver–colored washer (20b) on the shaft protruding
from
the big bearing of the drive housing (20). Align
the gears and push the new drive housing straight
onto
the pinion housing and locating pins (B).
9. Reassemble the sprayer. Or, go to the next section
in
this manual if further service is needed.
B
0401
40
21
48
49
23
20
20a
19p
3
2
1
20c
2
41
62
20b
TORQUE
T
O
25 ft–lb
(34 N.m)
A
19k
Fig.
19