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MOTOR (MODELS EJ4-4001 AND EJ8-4001A) Motor
Page 16b-6 2008-2011 IQ System Electric Vehicle Maintenance and Service Supplement
16B
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CAUTION
• Removing the armature from the end cap requires two people: one to operate the press, and
another to hold the armature. Failure to heed this CAUTION could result in personal injury
and/or damage to the armature resulting from an unsupported armature falling after it
becomes disengaged from the end cap bearing.
NOTE: Replacement of the end cap bearing is recommended if the armature is removed.
9.1. Place the end cap in a press with the armature facing down.
9.2. Place a bearing press tool with an outer diameter smaller than that of the armature shaft between
the press ram and the armature shaft (Figure 16b-8, Page 16b-6) .
9.3. Have an assistant support the armature while the press is activated.
10. Inspect the armature for wear and damage. See Armature Inspection and Testing on page 16b-7.
11. Inspect the motor frame and field windings. See Motor Frame and Field Windings Inspection on
page 16b-8.
12. Remove the brush rigging.
12.1. Mark the brush terminal posts (A1 and A2).
12.2. Remove the two nuts securing the brush terminals (A1 and A2) to the end cap (Figure 16b-9,
Page 16b-6) .
12.3. Remove the two screws and the brush rigging to the end cap (Figure 16b-10, Page 16b-7) .
13. Inspect the terminal insulators. See Terminal Insulator Inspection on page 16b-10.
14. Remove the bearing from the end cap.
14.1. Remove the retaining ring that secures the bearing in the end cap (Figure 16b-11, Page 16b-7) .
14.2. Use an arbor press to remove the bearing from the end cap.
15. Inspect the bearing for wear and damage. See Bearing Inspection on page 16b-10.
Figure 16b-8 Armature Removal Figure 16b-9 A1 and A2 Terminals