34
307–785
MOTOR REPLACEMENT
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!
WARNING
Refer to FIg 35–1 unless otherwise instructed.
1.
Remove the motor shield (59).
2.
Remove
the pressure control cover (63). Disconnect
the
four motor leads.
3.
Loosen
the conduit connector nut (345)
at the pres
-
sure
control (75).
4.
Swing
the conduit (1) away from the pressure control
elbow (31).
5. Remove the conduit seal (29) from around the con-
duit
elbow coming into the control box. Pull the motor
leads
through the elbow
, one at a time.
CAUTION
Always pull the motor leads one at a time to avoid
loosening
the terminals, which could result in a
bad
connection
and poor sprayer performance.
6.
Loosen
the connector nut (31) at the motor and
pull
the conduit (1) away from the motor . Pull the leads
through
the conduit, one at a time.
7.
Unscrew the connector elbow from the motor
.
8.
Pull the wires through the elbow
, one at a time.
9.
Remove the front cover and screws (49, 24).
10. Remove
the two screws (26) and washers (20) from
the
recess of the drive housing,
11. Remove
the two screws (13) and washers (20) from
the
lower rear of the motor front end bell (73b),
12. Remove
the two screws (16) and washers (20) from
the
upper rear of the motor front end bell (R).
13. Use a plastic mallet to gently tap the displacement
pump
(76) from the rear to loosen
the drive housing
(67)
from the front end bell (R). Pull the drive housing
away
from the end bell.
CAUTION
DO
NOT allow the gear cluster (51) to fall when re
-
moving
the drive housing (67). It is easily damaged
if dropped. The cluster may stay engaged in either
the
front end bell or the drive housing.
DO
NOT lose the thrust balls
(9) located at each end
of
the
gear cluster (51) or allow them to fall between
gears. The ball, which is heavily covered with
grease, usually stays in the gear 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 bearings will
wear
prematurely
.
14. While
supporting
the motor to keep the sprayer from
tipping, remove the four screws (8), washers (87),
lockwashers
(1
1) and nuts (10) holding the motor to
the
frame. Lift of
f the motor
.
15. Place the new motor on the frame and align the
frame mounting holes. Install the screws (8),
washers
(87), lockwashers (1
1) and nuts (10),
tightly
.
16.
Liberally grease the gear cluster (51) and pinion gear
(B)
and pack all bearings in the motor front end bell.
Check
to be sure the thrust balls (9) are in place.
17. Place the bronze–colored washer (67b) and THEN
the
silver–colored washer (67a) on the shaft protrud
-
ing
from the big gear in the drive housing (67).
18. Align the gears and push the drive housing (67)
straight
onto the front end
bell (R) and locating pins.
19. Starting
at Step
12 and working backwards, continue
to
reassemble the sprayer
.
NOTE: Use a turning motion on the conduit (1) when
feeding
wires through it.
20. Install the conduit seal (29) around the wires in the
conduit elbow (345) at the pressure control to keep
contaminants from entering the motor conduit. See
the
Detail in FIg 35–1.
21.
Install the motor shield and pressure control cover
.
To Next Page
Loading...
