Graco ULTRA 1000 Instructions-Parts List Manual page 30

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MOTOR REPLACEMENT
(Refer
to
Fig 26)
the risk of a fluid injection injury, injury from mov-
ing parts, or electric shock. Unplug the sprayer/
1. Remove the motor shield 114) and screws
(641.
2. Disconnect the pump outlet hose (47) from the
displacement pump outlet nipple
(46).
3. Remove the screws (15) and pressure control cover
(36) end disconnect the four motor leads. Sea Fig
19, page
25.
4. Use an adjustable wrench to loosen the conduit
connector nut (345) at the pressure control
assembly (43).
6. Swing the conduit
(22) away from the conduit
elbow (345).
6. Remove the conduit seal (5) from around the
vires
in the pressure control. Pull the motor leads
through the elbow, one at a time.
CAUTION
Always pull the motor leads one at e time to avoid
connection and poor sprayer performance.
loosening the terminals which could result in e bad
7. Loosen the nut of the connector
( 5 4 1
at the motor
and pull the conduit (22) away from the motor, than
pull the leads through the conduit, one at a time.
8.
Unscrew the connector elbow from the motor.
9.
Pull
the wires through the elbow, one at a time.
10. Remove the front covar and acrews 131.32).
11. Use a 114"
hex key wrench to remove the
two
screws (51 and washers (63) from the recess of the
drive housing, and the two screws (30) and washers
(63) from the lower rear of the motor front end bell
12. Use a plastic mallet
to
gently tap the displacement
from the front end bell. Then pull the drive housing
pump (39) from the rear to loosen the drive housing
away from the end b e l l .
,
(PI.
Ic
DO NOT allow the gear cluster
(9)
to fall when
removing the drive housing
(181. It is eady
damaged if dropped. The cluster may stay engag-
ed in either the front end bell or the drive housing.
end of the gear cluster (9) or allow them to fall
DO NOT lose the thrust balls (10) located et each
with grease, usually stays in the gear recesses, but
between gears. The ball, which is heavily covered
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
bearings will wear prematurely.
13. While supporting the
motor to keep the sprayer
from tipping, remove the nuts
(401,
lockwashen
(41). and capscrews (37) holding the motor mount-
ing plate (72) to the frame.
Lii
the motor assembly
off the frame.
14. Remove the mounting plate (72). four screws
( 7 9 )
and lockwashers (63) from the old motor, and in-
stall them on the new motor.
CAUTION
Be sure to install the correct length of screw.
Longer screws will damage the motor.
15. Place the new motor assembly on the frame and
align with the frame mounting holes. Install the
screws
(731,
lockwasher (41). and nuts (40). tightly.
16. Liberally greese the gear cluster 19) and pinion gear
(0)
and pack all bearings in the motor front end
place.
bell. Check to be sure the thrust balls (10) are in
17, Place the bronze-colored washer (18b) and then the
silver-colored washer (18a) on the shaft protruding
from the big gear in the drive housing (181.
18. Align the gears end push the drive housing (18)
straight onto the front end bell and locating pins.
19. Starting at Step 11 and working backwards, con-
tinue to reassemble the sprayer.
NOTE: Use a turning motion on the conduit when
feeding wires through it.
20.
Reinstall
the conduit
seal
(&not shown) around the
wires
in the conduit elbow
(346) at the pressure
control to keep contaminants from entering the
pressure control.
21. Reinstall the motor cover and pressure control
cover.
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30
307-785