Graco 231-033 Instructions-Parts List Manual page 33

WARNING
To reduce the risk of serious injury, follow the illus-
trated Pressure Relief Procedure
page 24 whenever you are instructed to relieve
pressure.
CAUTION
DO NOT drop the gear cluster (51) when removing
the drive housing (67). The gear cluster may stay
engaged in the motor front end bell or the drive
housing.
DO NOT lose the thrust balls (9) located at each
end of the gear cluster (51) or drop them between
gears. The balls, which are heavily covered with
grease, usually stay in the shaft recesses, but could
be dislodged. If caught between gears and not re-
moved, the balls will seriously damage the drive
housing. If the balls are not in place, the bearings
will wear prematurely.
NOTE: Read the GENERAL REP AIR INFORMATION
on page 24 before doing this procedure.
NOTE: Refer to Fig 33–1 for this procedure.
1. Relieve pressure.
2. Remove the front cover (49) and the motor shield
(59). For the upright sprayer only , unclip the drain
hose (99) from the pump.
3. Remove the four bearing housing screws (25) and lo-
ckwashers (23).
4. Lightly tap the lower rear of the bearing housing (69)
with a plastic mallet to loosen it from the drive hous-
ing (67). Pull the assembled bearing housing and
connecting rod straight off the drive housing.
LIBERALLY APPLY GREASE
69
25,23
TORQUE TO
175 in-lb (19 N.m)
49
99
Fig 33–1
DRIVE HOUSING REPLACEMENT
warning on
67a
51
67b
67
E
26
5. Remove the two drive housing screws (26) and
lockwashers (20).
6. Remove the two lower screws (13) and lockwashers
(20) and then the two upper screws (16) and lock-
washers (20) from the front of the motor (73).
7. Tap the drive housing (67) with a plastic mallet to
loosen it from the front of the motor (73), and then pull
the drive housing straight off.
8. Liberally apply bearing grease to the gear cluster
(51). The gear area should have approximately 4
total ounces of grease. Grease is supplied with the
drive housing replacement kit. Be sure the thrust
balls (9) are in place.
9. Place the bronze-colored washer (67b) THEN the
silver-colored washer (67a) on the shaft protruding
from the big gear in the drive housing (67).
10. Align the gears and push the
straight onto the front of the motor and locating pins.
11. Continue reassembling the sprayer.
34
16
20
R
9
9
20
new drive housing
59
13
20