Page J-2
Repair and Service Manual
B
MOTOR
Read all of Section B and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
Fig. 3 Motor Components
Bearing Replacement
Tool List
Qty.
Heat gun or lamp ......................................................... 1
Arbor press .................................................................. 1
Bearing driver set ........................................................ 1
Snap ring pliers............................................................ 1
Do not use a torch to heat the commutator end cover.
Only a moderate amount of heat should be applied.
Excessive heat will damage the end cover and bearing.
Proper support must be given to the commutator end
cover during press operations. Inadequate and/or
uneven support will cause the end cover to fracture.
To aid disassembly, heat only the commutator end cover
before attempting removal of the armature.
Once heated, place the commutator end cover/armature
assembly in press, giving as much support to the end
cover as possible, and press the armature out of the
bearing.
Push back each brush until its spring (15) is resting
against the side of the brush (Ref. Fig. 3). This keeps
the brushes out of the way during bearing replacement
(Ref. Fig. 5).
Remove internal snap ring (6) and heat the commutator
end cover again. Press bearing (7) out from commutator
end cover (3).
When installing bearing into end cover, apply pressure
against the bearing’s outer race to avoid bearing dam-
age.
Press the new bearing into the commutator end cover
using heat again to aid installation.
Install the snap ring.
If brushes are to be replaced, proceed now to ‘Brush Replace-
ment’ before installing the armature.
For proper location, the armature has a positive stop
feature.
S
1
S
2
A
1
A
2
5
4
11
8
9
15
14
12
3
2
13
6
7
1
17
NOTICE
