Hitachi Starter Motor


Remove terminal nut, washer and lockwasher (1). Remove nuts and lockwashers (2) from thru bolts (3). Remove thru bolts with lockwashers (3). Remove two screws and lock-washers (4) fastening the rear cover.

Separate the rear cover (5) from the starting motor frame as follows: tap the rear cover with a soft hammer to make an opening between the rear cover and the frame. Next insert a screwdriver into the opening and push out the rear cover taking care to see that terminal and insulator (6) remain in place next to motor frame.

Figure 5-32. Removing Brushes - Hitachi Motor

Lift the brushes from the commutator. As shown in Figure 5-32, pulling up the brush spring with a steel wire and pull out the brushes. Note that two minus brushes (7) have to be withdrawn slightly to be held in the brush guide, making use of the action of the brush spring. The other two plus brushes (8) should be completely removed from the brush holder assembly (9) as shown in Figure 5-33.

Figure 5-33. Hitachi Brushes and Brush Holder

Figure 5-32. Removing Brushes - Hitachi Motor

Figure 5-33. Hitachi Brushes and Brush Holder

Remove front cover (10), armature (11) with ball bearing (12) and thrust washer(s) (13).

Assemble starting motor in reverse order of disassembly, noting the following:

1. To determine the proper position of frame and front cover, align notch in cover with projected part of the frame.

2. After installing positive brushes in the brush holder and covering with the rear cover, align and fasten the brush holder to the rear cover with screws and lockwashers from the outside of the rear cover.

3. Thru bolt nuts should be tightened to 20-25 in-lbs torque.

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