4-46 TRACTION MOTOR BRUSHES AND BRUSH HOLDERS (cont)
Make sure brushes are not sticking, oily, or broken.
Make sure there is a clearance of 1/8 inch (1.6 mm) between brush holder and commutator.
Disconnect latch (1) and remove two covers (2).
If only the brushes are unserviceable,
they can be replaced without removing
the brush holders.
Remove screw (3). Lift spring (4) and remove
Disconnect electrical lead from brush holder (6).
Remove bolt (7) and both halves of clamp (8)
and remove brush holder.
Position lower half of clamp (8), brush holder (6), and upperhalf of clamp on traction motor.
Install bolt (7) finger tight. Connect electrical lead.
Raise spring (4) and install brushes (5). Release spring. Install screw (3).
Keep the underside of the brush holder carbon box within a minimum of 1/16 inch (1.6 mm) of the commutator
and tighten bolt (7).