JLG 20VP (3120728) Service Manual - Manual (Page 32)

SECTION 2 - SERVICE PROCEDURES
2-14 – JLG Lift – 3120728
Brush Reassembly (See Figure 2-12.)
MAKE CERTAIN THAT THE GROUND WIRE IS SECURELY RECON-
NECTED TO THE GROUND TERMINAL IF REMOVED. LEADS,
INTERNAL TO THE SHEILD, MUST BE ROUTED AWAY FROM THE
ARMATURE, (E.G.: BE CLOSE TO THE INSIDE WALL OF THE
ALUMINUM SHIELD) TO PREVENT A SAFETY HAZARD AND/OR
DAMAGE TO THE MOTOR.
1. Install the brush (pig-tail) terminal end under the
screw on the brush box in the same manner as the
old brush that was removed and tighten the screw.
2. Slide the body of the brush into the brush box, be
certain that the wire (pig-tail) is aligned with the slot
in the base of the brush box so that it can "feed" into
the brush box slot as the brush wears down.
NOTE: The pig-tail wire should be formed to rest against the
nonmetallic insulator. It must be spaced from any
metallic surfaces other than the brush box by a mini-
mum of .125 in. (3mm).
3. Now install the brush retaining spring bracket. Grasp
the tip of the spring bracket such that the roll-type
spring will be on the "brush side" of the brush box,
and resting on top of the brush when the brush
spring is completely installed.
4. Push the spring bracket slowly into it’s slot while let-
ting it’s two attaching hooks slide on the wall of the
brush box.
5. Stop, but do not release the spring bracket when it’s
hooks slip around the edge of the brush box.
6. While still grasping the spring bracket with the pliers,
slowly bring the spring back out of the brush box
until the hooks latch around the edge of the brush
box.
7. Now release the spring bracket and check that it is
lying flat against the brush box wall. If it is "cocked" it
is improperly seated and will have to be reinstalled.
THE SPRING BRACKET MUST BE ALSO LIE COMPLETELY INSIDE
THE BRUSH BOX AND NOT OUT OVER THE EDGE. THE ROLL
END OF THE SPRING MUST BE CENTERED ON THE TOP OF THE
BRUSH. (SEE FIGURE 2-13.)
8. Also apply slight pressure by pulling up on the
spring bracket to be certain it is hooked securely
around the brush box wall at the bottom of the brush
box.
9. Screw the brush caps back into the end shield using
the largest possible screwdriver.
10. Reinstall the drive motor(s) to the machine and
reconnect the power source.
NEW BRUSHES MAY BE SEATED BY RUNNING THE DRIVE
MOTOR AT NO LOAD. PROPER SEATING IS REQUIRED FOR
LOWEST BRUSH NOISE LEVEL.
Figure 2-13. Correct/Incorrect Brush Spring Bracket
Positions.
CORRECT
INCORRECT