Drive Housing - Graco LineLazer GM 3500 Manuel D'instructions

WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 7.
NOTE: Refer to Fig. 29 for this procedure.
1. Remove the front cover (74).
2. Disconnect the pump outlet hose (133).
3. Remove the four screws (81) and lockwashers (46)
from the bearing housing (76).
4. Lightly tap the back of the bearing housing (76) with
a plastic mallet. Pull the pump, bearing housing and
connecting rod away from the drive housing as one
assembly.
5. Remove the two bearing housing screws (80) and
lockwashers (59). Remove the four pinion housing
screws (67) and lockwashers (59).
6. Lightly tap around the drive housing (77) with a plas-
tic mallet to loosen it from the pinion housing (138p).
Torque to 175 in–lb (20 N.m)
74
73
133
Fig. 29

Drive Housing

77
79
76
Do not drop the gear cluster (78) when removing the
drive housing (77). The gear cluster is easily dam-
aged. The gear may stay engaged in either the drive
housing or the pinion housing.
Do not lose the thrust balls (77c and 138k) located at
each end of the gear cluster. The balls, which are
heavily covered with grease, usually stay in the shaft
recesses, but they could be dislodged. If they are
caught between the gears and not removed, the balls
will seriously damage the drive housing. If the balls
are not in place, the bearings will wear prematurely.
7. Liberally apply bearing grease (77d, supplied) to the
gear cluster (78). Be sure the thrust balls (77c and
138k) are in place.
8. Place the bronze colored washer (77a) and then the
silver–colored washer (77b) on the shaft protruding
from the big bearing of the drive housing (77). Align
the gears and push the new drive housing straight
onto the pinion housing and locating pins (B).
9. Starting at Step 5, work backwards to reassemble
the sprayer. Or, move ahead to the next section in
this manual if further service is needed.
67
59
B
138p
77b
77a
59
80
46
81
CAUTION
67
59
138k
78
77c
0039A