Drive Housing - Graco GM 5000 Instructions And Parts List

Drive Housing
WARNING
NOTE: Refer to Fig. 34 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
assembly.
connecting.rod awayfromthe drive housing as one
5.
Remove the
two
bearing housing screws
(80)
and
screws (67) and lockwashers (59).
lockwashers (59). Remove the four pinion housing
6. Lightlytap around the drive housing
(77) with a plas-
tic malletto loosen itfrom the pinion housing (138~).
r
CAUTION
the drive housing (77). The gear cluster is easily
DO NOT drop the gear cluster (78) when removing
damaged. 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
caught between the gears and not removed, the
recesses, but they could be dislodged.
If
they are
balls will seriously damage the drive housing. If the
balls are not in place, the bearings will wear prema-
turelv.
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. Starling at Step 5, work backwards to reassemble
the sprayer. Or, move ahead
to
the next section in
this manual if further service is needed.
A
Torque to 175 In-lb
(77
N.m)
308-105
31