FAN 4325197 - Caterpillar

Illustration 5 g00801373
42-MT Cross section view (1) Nut (Battery) (2) Solenoid Mounting Screws (3) Pinion (4) Pinion Drive Housing Bolts (5) Shift Lever Housing Bolts (6) Field Winding Screws (7) Laminated Core (8) Brush (9) Commutator (10) Ground Terminal Nut (11) Brush Lead Screws (12) Rear Housing Bolt (13) Motor Terminal Bolt (14) Motor Terminal Nut
Illustration 6 g00801384
42-MT End View (1) Nut (Battery) (10) Ground Terminal Nut (13) Bolt (Motor Terminal) (14) Motor Terminal Nut (15) Nut (Terminal)
Table 6
42-MT Complete Starting Motor Specifications    
Rated Voltage:    12 V    24 V    
Solenoid Winding     Pull-In Resistance (1)     0.11 to 0.15 Ohms     0.43 to 0.49 Ohms    
Hold-In Resistance (1) 0.5 to 0.59 Ohms     1.37 to1.77 Ohms    
Pull-In Current (1) 92.5 7.5 Amp at 10 V     56.5 4.5 Amp at 20 V    
Hold-In Current (1) 23 Amp at 10 V     14.6 Amp at 20 V    
No-Load Test     Voltage     11.0 V     23.0 V    
Current 127.5 27.5 A     67.5 7.5 A    
Speed 6900 1800 rpm     7643 1683 rpm    
Load Test (2)     Voltage     9.0 V     18.0 V    
Current 1400 A     750 A    
Speed 1200 rpm     1200 rpm    
Commutator (6)     Diameter    
54.0 mm (2.13 inch)    
54.0 mm (2.13 inch)    
Diameter (min)
51.9 mm (2.04 inch)    
51.9 mm (2.04 inch)    
Depth Of Insulation Between Commutator Bars (min) The insulation cannot be undercut.    
0.64 mm (0.025 inch)    
Total Indicator Runout (max)
0.13 mm (0.005 inch)    
0.13 mm (0.005 inch)    
Pinion (12)     Clearance    
9.1 0.8 mm (0.36 0.03 inch)    
9.1 0.8 mm (0.36 0.03 inch)    
Brush (7)     Length (3)    
23.0 mm (0.91 inch)    
23.0 mm (0.91 inch)    
Length (4)
10.0 mm (0.39 inch)    
10.0 mm (0.39 inch)    
Laminated Core (8)     Total Indicator Runout (max)    
0.13 mm (0.005 inch)    
0.13 mm (0.005 inch)    
Torques     Nut (Battery) (1)    
30 3 N m (22 2 lb ft)    
30 3 N m (22 2 lb ft)    
Solenoid Mounting Bolts (2)
17.8 3.7 N m (13 3 lb ft)    
17.8 3.7 N m (13 3 lb ft)    
Pinion Drive Housing Bolts (4)
23.7 6.1 N m (17 4 lb ft)    
23.7 6.1 N m (17 4 lb ft)    
Shift Lever Housing Bolts (5)
18.9 2.6 N m (14 2 lb ft)    
18.9 2.6 N m (14 2 lb ft)    
Field Winding Screws (6) (5)
20.3 2.3 N m (180 20 lb in)    
20.3 2.3 N m (180 20 lb in)    
Rear Housing Bolts (12)
5.7 1.1 N m (4 1 lb ft)    
5.7 1.1 N m (4 1 lb