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STEP #9 – Install Springs
Correct replacement of brush springs is critical to assure optimum drive
performance. Grasp the tip of the spring bracket such that the coil of the roll-
type spring will be on the “brush side” of the brush box, and resting on the brush
when the brush spring is brought up to the brush box (see Figure 12). Push the
spring bracket slowly into its slot while letting its two attaching hooks slide on
the wall of the brush box. Stop, but do not release the spring bracket when its
hooks slip around the edge of the brush box. While still grasping the spring
bracket with the pliers, slowly bring the bracket back out of the brush box until
the hooks latch around the edge of the brush box. Release the pliers. If the
spring bracket is properly seated it will be lying flat against the brush box wall.
If it is “cocked” to one side, it is improperly seated – release the spring and
reassemble it again. Important: As a final check, apply slight pressure on the
spring bracket in the direction away from the brush with the tip of the pliers –
the bracket not “popping” out indicates proper latching of the hooks. See Figure
14 for additional illustration of how the spring should be installed in the brush
box.
CAUTION
Make certain that the coil of the springs is
centered directly on the brushes (see Figure 13).
Failure to do so will result in poor motor
performance.
Figure 12 – Grasp spring.
Figure 13 – Coil centered directly over brush.
