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MOTOR REPLACEMENT
(Refer to Fig 28)
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Before doing this procedure, follow the Pressure
the risk of a fluid injection injury, injury from mov-
Rellef Procedure Warnlng on page 13 to'reduce
ing parts, or electric shock. Unplug the sprayer1
1. Remove the motor shield (14) and screws (64).
2. Disconnect the pump outlet hose
(47) from the
displacement pump outlet nipple
(48).
3. Remove the screws (151 and pressure control cover
(36) end disconnect the four motor leads. See
Fig 19, page
25.
4. Use an adjustable wrench
to loosen the conduit
connector nut
( 5 4 6 )
et the pressure control
assembly (43).
5.
Swing the conduit
(22) away from the conduit
elbow
( 5 4 6 ) .
8.
Remove the conduit seal (5) from around the wires
in the pressure control. Pull the
motor leeds
through the elbow, one at a time.
CAUTION
Always pull the motor leads one at e time to avoid
loosening the terminals which could result in e bad
connection and poor sprayer performance.
7. Loosen the nut of the connector (54a) at the motor
and pull the conduit (22) away from the motor, then
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 et a time.
10. Remove the front cover end screws (31,321.
11. Use e 114" hex key wrench
to remove the three
screws (30) and washers (63) from the recess of the
drive housing, and the two screws (21
1
and washers
(63) from the top rear
o f
the motor front end bell
(E).
12. Use a plastic mallet to gently tap the displacement
pump
(391
from the rear to loosen the drive housing
from the front end bell. Then pull the drive housing
away from the end bell.
r-
CAUTION
DO NOT allow the gear cluster (91 to fall when
removing the drive housing
(18). It is easiiy
damaged if dropped. The cluster may stay engag-
ed
in either the front end bell or the drive housing.
end of the gear cluster (91 or ellow them to fall
DO NOT lose the thrust balls (10) located at each
with grease, usually stays in the gear recesses, but
between gears. The bell, which is heavily covered
could be dislodged. If caught between gears and
drive housing. If the balls are not in place, the
not removed, the balls will seriously damage the
bearings will wear prematurely.
13. While supporting the motor
to keep the sprayer
from tipping, remove the
nuts (40). lockwashers
(41) and camcrews (37) holdina the motor mount-
ing plate (72) to the frame. Liftihe motor assembly
off the frame.
14. Remove the mounting plate (721. four screws (79)
and lockwashers (63) from the old motor; and in-
s t e l l them on the new motor.
I c
Be sure
to instell 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 (73). lockwashers (41) end nuts (40) tightly.
18. Liberally grease the gear cluster (91 and pinion gear
( 0 )
and pack all bearings in the motor front end
bell. Check to be sure the thrust balls (10) are in
place.
17. Be sure the bronzecolored washer (27a) is in place
on the cranksheh
(27).
18. Align the gears and push
the drive housing
(18)
straight onto the front end bell end locating pins.
19. Starting et Step 11 end working backwards, con-
tinue to reassemble the sprayer.
NOTE:
Use e turning motion on the conduit when
feeding wires through it.
20.
Reinstall the conduit seal ( h o t shown) around the
wires in the conduit elbow
( M b )
a t 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
307-758
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