Drive Housing - Graco Roof Rigs 224483 Instructions-Parts List Manual

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).
TORQUE TO
25 ft–lb
(34 N.m)
40
21
Fig. 19

Drive Housing

20
23
49
48
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
20b
20a
2
41
62
A
CAUTION
19p
3
2
19k
1
20c
0401