JLG SSV10 Service Manual - Manual (Page 44)

SECTION 3 - BASE COMPONENTS
3-16 – JLG Lift – 3121187
Drive Motor Brush Replacement
Each drive motor contains two (2) brushes, the brushes
are located under the two (2) large round slotted brush
caps on the front end of each drive motor.
NOTE: When determining hourmeter hours on the Ground Control
Module for brush replacement, remember the hourmeter dis-
play can be RESET back to 00000.0 at any time. A more
accurate reading can be obtained by entering the Ground
Control Module programming mode and checking the Timer
readings there. Also if the machine’s Ground Control Module
has been replaced the current hourmeter hours will also be
inaccurate unless a written record has been kept.
The drive motor brushes must be replaced, depending on
application, every 200 - 400 hours (Traction Time) as indi-
cated on the Ground Control Module in programming
mode. See Section 4, Ground Control Module Program-
ming about accessing the machine timer hours.
NOTE: If machine hourmeter hours cannot be determined accurately
as noted above, a visual inspection and measurement of the
brushes must be made. The brushes must be replaced
before they are less than .405 inch (11mm) in length.
DISCONNECT THE POWER LEADS FROM THE POWER SOURCE
BEFORE INSPECTING OR REPLACING BRUSHES.
Brush Removal
Removal of the brushes also requires the removal of the
drive motor(s) from the machine, See Drive Motor Assem-
bly - Removal on Page 3-11.
After removing the drive motor from the machine, remove
the brush assemblies using the following steps:
1. Remove the clamp and protective rubber boot from
the drive motor.
2. Unscrew the large round brush caps from each side
of the drive motor, use as large a screw driver as
possible.
3. The brushes are retained by constant-force, roll-type
springs. To remove the springs, press inward on the
end of the spring retaining bracket using the tip of a
pair of long nose pliers or other appropriate tool.
The brushes should pop out, if not, they can be
removed by pulling outward on the spring brackets
with a pair of long nose pliers after the inside ends
are unhooked.
4. Now pull the brush out of the brush box by it’s wire
(pig-tail).
NOTE: If only inspecting the brushes, it is not necessary to remove
the pig-tail terminal from it’s connection to the brush box.
5. Loosen the screw securing the pig-tail terminal end
to the brush box and slide the terminal end out from
under the screw completely removing the brush
from the drive motor.
Drive Motor Brush Location
1. Brush Location 2. Brush Caps (shown removed)
Brush Component Installation
1. Roll Spring 4. Brush Box Insulator
2. Roll Spring Hooks 5. Brush
3. Brush Box 6. Pigtail Wire
5
3
4
6
1
2
2