37-MT, 41-MT, and 42-MT Series Starting Motors Starting Motor - Assemble - 42-MT Caterpillar


Starting Motor - Assemble - 42-MT
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1.1. Assemble the Starting Motor

Assemble the Starting Motor

Table 1
Required Tools    
Tool     Part Number     Part Description     Quantity    
A     1P-1855     Retaining Ring Pliers     1    
B     1P-0510     Driver Gp     1    



    Illustration 1g00810589

  1. Put SAE 20W oil on all bushings, seals and oil wicks.

  1. Put field winding coil (24) and pole shoes (25) in position in the starting motor housing. Put 9s-3263 Thread Lock Compound on the threads of screws (26). Tighten screws (26) to a torque of 20.3 ± 2.3 N·m (179.7 ± 20.4 lb in).



    Illustration 2g00810588

  1. Put 5P-0960 Molybdenum Grease on the armature bushing areas. Do not put grease on the armature core or the commutator. Put armature (23) into the starting motor housing.



    Illustration 3g00810585

  1. Install the outside O-ring seals if it is necessary. Install the shift lever housing (21). Install five bolts (22). Install the brake disc on the armature shaft.



    Illustration 4g00810582

  1. Install the pinion drive (19) and the shift lever. Install the O-ring seal if it is necessary. Install the shift lever pin (20). Install the retainer (18) with tool (A) .



    Illustration 5g00810579

  1. Align the pinion drive housing (16). Install six bolts (17) .



    Illustration 6g00818538

  1. Install brushes (15) and negative "-"terminal (14) in the brush holders. Install brush spring (10) against the side of each brush.



    Illustration 7g00810576

  1. Install the brush holder. Connect the field winding leads (13) to the brush holder (11) .

  1. Put the washer (12) onto the armature assembly. Push the brushes (10) into the holders so that the springs are on top of the brushes.



    Illustration 8g00818558

  1. Install the bushing (9) into the rear housing if it is necessary.



    Illustration 9g00810574

  1. Install six bolts (8) and rear housing (7). Torque bolts (8) to 5.7 ± 1.1 N·m (50.4 ± 9.7 lb in). Install wire assembly (2), washers, and negative terminal nuts "-".



    Illustration 10g00810559

  1. Install solenoid (1). Align the solenoid link with the hole in the shift lever. Install three bolts (2) in the shift lever housing. Torque bolts (2) to 17.8 ± 3.7 N·m (157.5 ± 32.7 lb in).

  1. Install wire assembly (4). Connect motor terminal "MTR" (3) to the starter motor housing.



    Illustration 11g00810580

  1. Install pinion clearance adjustment nut (6) .

  1. Adjust pinion clearance. Refer to Testing and Adjusting, "Pinion Clearance - Adjust" for pinion clearance adjustments.



    Illustration 12g00818016

  1. Install the O-ring seal and bushing (5) .

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