JLG 3246ES Service Manual - Manual (Page 65)

SECTION 3 - CHASSIS & SCISSOR ARMS
3121166 – JLG Lift – 3-29
NOTE: A well-planned maintenance program will save
many hours of future down time and expense on a
piece of equipment. Periodic maintenance consisting
of inspections of motors, batteries and wiring cir-
cuitry is recommend.
CAUTION
EYE PROTECTION SHOULD BE WORN DURING ANY MAINTE-
NANCE OPERATION.
Disassembly
1. Remove the 2 (#8-32UNC x.50 in long) screws
holding the cover plate in place and remove the
cover plate from the motor
.
2. Remove the 2 (M5 x 0.8 x 20mm long) screws hold-
ing the cover (15) in place and set aside. These
screws are needed later to manually release the
brake. Slide the strain relief bushing (14) and wire
harness out of the cover and remove the cover
from the motor. Remove strain relief bushing from
wire harness and set aside.
3. Discard the O-ring (13) located inside the cover.
4. Remove the wire harness (8) from the motor by
disconnecting the field connection and brake con-
nection. Install the 2 cover mounting screws into
the threaded holes in the brake assembly and
tighten to manually release the brake. See Figure 2
below or image in the “Manual Disengage Proce-
dure” on page 8 of the gearbox section of this
manual.
5. Remove the 3 screws holding the brake assembly
(11) to the motor. Carefully remove the brake
assembly and friction disk (10) from the motor by
sliding it off of the shaft.
6. Remove the screws holding the commutator end
head (9) in place and remove the commutator end
head from the frame and field assembly (1). The
armature (2) will be attached to the commutator
end head.
7. Pull back the brush springs (4) in the commutator
end head, pull the brush back and rest the springs
on the side of the brush. The brushes should move
freely within the holders.
8. Use an arbor press or a bearing puller to remove
the armature from the commutator end head
assembly.
9. Remove the snap ring (6) and bearing (7) from the
commutator end head. Discard the bearing.
COVER PLATE
MOUNTING SCREWS
COVER MOUNTING
SCREWS
Figure 3-25. Motor Side
WIRE HARNESS
BRAKE CONNECTOR
RED WIRES
THREADED HOLES IN
BRAKE ASSEMBLY
BRAKE ASSEMBLY
MOUNTING SCREWS
BLACK WIRES
FIELD CONNECTION
Figure 3-26. Motor Front