Drive Housing Replacement - Graco A Series Instructions-Parts List Manual

WARNING
Before doing this procedure, follow the Pressure
Relief Procedure Warning on page 24 to reduce
the risk of a fluid injection injury , splashing in the
eyes or in the skin, injury from moving parts or elec-
tric shock. Unplug the sprayer!
NOTE: Stop the sprayer at the bottom of its stroke to get
the crank (E) in its lowest position. T o lower it
manually, carefully rotate the blades of the fan
with a screwdriver.
1. Remove the front cover and screws (4,3).
2. Disconnect the pump outlet hose from the displace-
ment pump outlet adapter. Remove the suction tube
assembly at the swivel union.
3. Remove the four screws (86) and lockwashers (87)
from the connecting rod assembly.
4. Lightly tap the lower rear of the bearing housing (62)
with a plastic mallet to loosen it from the drive hous-
ing (59). Then pull the bearing housing and connect-
ing rod assembly straight off the drive housing.
5. Remove the two screws (61) and lockwashers (57)
from the recess of the drive housing, the two screws
(67) and lockwashers (57) from the bottom rear of the
motor front end bell (56b), and the two screws (58)
and lockwashers (57) from the upper rear of the mo-
tor front end bell (56b).
59
57
E
61
87
86
TORQUE TO
175 IN–LB
(20 N.M)
3
4
Fig 35–1

DRIVE HOUSING REPLACEMENT

68
59a
66
GREASE LIBERALLY
59b
68
6. Lightly tap the drive housing (59) with a plastic mallet
to loosen it from the front end bell, then pull it straight
off.
DO NOT allow the gear cluster (66) to fall when re-
moving the drive housing (59). It is easily damaged
if dropped. The gear may stay engaged in either the
front end bell or the drive housing.
DO NOT lose the thrust balls (68) located at each
end of the gear cluster (66) or allow them to fall be-
tween 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 removed, the balls will seriously damage the
drive housing. If the balls are not in place, the bear-
ings will wear prematurely.
7. Liberally apply bearing grease to the gear cluster
(66). Use approximately 6 oz. of the grease supplied
with the drive housing replacement kit. Check to be
sure the thrust balls (68) are in place.
8. Place the bronze–colored washer (59b) THEN the
silver–colored washer (59a) on the shaft protruding
from the big gear in the drive housing (59). Align the
gears and push the new drive housing straight onto
the front end bell and locating pins.
9. Starting at Step 5 and working backwards, continue
to reassemble the sprayer.
96
17
58
57
CAUTION
307–958