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


Starting Motor - Disassemble - 42-MT
`
1.1. Disassemble the Starting Motor

Disassemble the Starting Motor

Note: The disassembly and assembly that follows is of the 24 volt starting motor. The 12 volt is similar.

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



    Illustration 1g00810559

  1. Disconnect wire assembly (4) from solenoid (1). Disconnect motor terminal connector (3) from the starting motor housing.

  1. Remove three bolts (2) from the shift lever housing. Do not disassemble the solenoid. The parts inside the solenoid are not serviceable.



    Illustration 2g00818016

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



    Illustration 3g00810580

  1. Remove the nut (6). Remove the solenoid from the shift lever housing.



    Illustration 4g00810574

  1. Remove the negative terminal nuts "-", wire assembly (2), and washers. Remove six bolts (8) and rear housing (7) .



    Illustration 5g00818558

  1. If necessary, remove bushing (9) from the rear housing.



    Illustration 6g00810576

  1. Remove washer (12) from the armature shaft. Lift brush springs (10) and pull the brushes away from the commutator. Position the brush springs (10) on the side of the brushes in order to hold the brushes in the holders.

  1. Disconnect field winding leads (13) from brush holder (11). Remove the brush holder.



    Illustration 7g00818538

  1. Remove brushes (15) and negative "-" terminal (14) from the brush holders.



    Illustration 8g00810579

  1. Scribe a line on the pinion drive, the shift lever and the starting motor housings for the correct alignment at assembly.

  1. Remove six bolts (17) and pinion drive housing (16) .



    Illustration 9g00810582

  1. Remove retainer (18) with tool (A). Remove shift lever pin (20). If necessary, remove the O-ring seals from the shift lever pin.

  1. Remove pinion drive (19) and the shift lever.



    Illustration 10g00810585

  1. Remove the brake disc from the armature shaft. Remove five bolts (22), shift lever housing (21) and the washer. If necessary, remove the outside O-ring seals.

  1. If necessary, remove the seal and the bushing from the shift lever housing.



    Illustration 11g00810588

  1. Remove armature (22) from the starting motor housing.



    Illustration 12g00810589

  1. Remove the following components from the starting motor housing: eight screws (26), pole shoes (25) and field winding coil (24). It may be necessary to use an impact driver to remove screws (26) .

  1. Clean the armature, field winding coil and pinion drive with mineral spirits and a brush.

    Note: If the commutator is dirty, the commutator may be cleaned with Number 00 sandpaper. Do not use emery cloth.

  1. Inspect all parts for wear and damage.

Information System:

330C Excavator Engine Oil and Filter - Change
W345B Series II Material Handler Hydraulic System Main Control Valve
W345B Series II Material Handler Hydraulic System Main Hydraulic System
325C and 325C L Excavator Engine Speed Control
312C Excavator 3064 Engine Supplement Fan - Remove and Install
312C Excavator 3064 Engine Supplement Fan Guard - Remove and Install
37-MT, 41-MT, and 42-MT Series Starting Motors Starting Motor - Assemble - 37-MT and 41-MT
2001/07/30 The Corrections for Parts Manual, HEBP1719-05 are Now Available {1000, 5057, 5061, 7000}
312C Excavator Machine Systems Bucket Cylinder - Install
2001/07/16 An Improved Seal Kit for the Second Generation ALA Swivel is Available {5060}
Installation of the Update of the Swing Drive System for the 5130B Excavator{5057, 5058, 5059, 5459}
5130B Excavator Hydraulic System Relief Valve (Main)
Procedure for the Repair of Compensator Valves in the Main Hydraulic Control Valve{5051, 5086}
5230B Excavator Electronic Systems Guide Related Components
37-MT, 41-MT, and 42-MT Series Starting Motors Starting Motor - Assemble - 42-MT
385B Excavator Monitoring System
385B Excavator Main Menu
HDB Series and M1 Series Heavy Duty Brushless Alternators Alternator
2002/01/07 A New Exhaust Seal And A New Exhaust Manifold Sleeve Are Used In The Exhaust Manifold Groups {1059}
5230B Excavator Electronic Systems Guide Diagnostic Code List
385B Excavator Boom, Stick and Bucket Linkage - Lubricate
312C Excavator 3064 Engine Supplement Expansion Tank - Remove and Install
3500B Engines Jacket Water Cooling Circuit
325C Excavator Safety Messages - Arrangement I