JLG 19AMI Service Manual - Manual (Page 26)

SECTION 2 - SERVICE PROCEDURES
2-12 – JLG Lift – 3121190
Once brush housing has been removed, inspect the rotor
commutator for excessive wear before installing a new
brush set.
The rotor commutator surface when new, is approximately
1/8 in. (3mm) in thickness.
Brush Housing Final Assembly Tips
It is easier to install the brush housing assembly by sliding
the rotor assembly completely out of the other end of the
motor housing, then attach the brush housing first. After
the brush housing is installed look into the motor housing
from the opposite end to check that the positive (+) post
wires and static winding wires are positioned, not to block
the holes for the motor mounting bolts, inside the motor
housing.
After final assembly of the brush housing check that all
brush terminal screws are tight and the brush springs are
positioned properly before mounting the motor to the
pump/motor end head.
New Brush Installation
1. Brush Terminal Screw 4. Brush Spring
2. Brush
5. (See Installation Note Below)
3. Brush Holder
Installation the same for all four (4) brush assemblies.
Note: Using a clean towel, push each brush (2) up into it’s holder
(3), slide the spring (4) over the side of the brush. This will hold
each brush in place and allow them to clear the rotor commutator
during reassembly.
Clean the rotor commutator with a non-conductive electrical
cleaner before assembling the brush housing to the motor hous-
ing.
1
2
3
4
5
Brush Final Positioning
ONCE THE ROTOR ASSEMBLY IS IN PLACE, REMEMBER TO
PUSH EACH BRUSH DOWN UNTIL THE BRUSH FACE IS IN
CONTACT WITH THE COMMUTATOR ON THE ROTOR SHAFT
AND THE BRUSH SPRING IS PUSHING DOWN ON TOP OF
THE BRUSH.