3408C & 3412C INDUSTRIAL ENGINES Caterpillar


Starting Motors

Usage:

Air

4W5105 Motor Group

(1) Cover.

Tighten the bolts evenly in small increases until the torque is ... 80 N·m (60 lb ft)

(2) Torque for bolts ... 36 N·m (26 lb ft)

(3) Torque for bolt ... 78 N·m (55 lb ft)

(4) Torque for bolt that holds piston ... 110 N·m (80 lb ft)

(5) Rotor clamp nut.

Tighten nut until clearance between rear end plate and rotor is ... 0.03 to 0.08 mm (0.001 to 0.003 in)

Check clearance again after the bolt for the clamp nut is tightened.

(6) Torque for bolt that holds rotor ... 120 N·m (90 lb ft)

105-5080, 105-5081 Motor Group

(1) Tighten bolts in steps to a torque of ... 30 ± 5 N·m (22 ± 4 lb ft)

(2) Clearance between rotor and end plate ... 0.81 mm (.032 in)

(3) Tighten bolts in steps to a torque of ... 11.3 N·m (100 lb in)

Pressure Regulating Valve For Air Starting Motor


Typical Example

(1) Adjusting screw.

(2) Inlet pressure ... 1725 kPa (250 psi)

Maximum permissable inlet pressure ... 3100 kPa (450 psi)

(3) Minimum outlet pressure ... 620 kPa (90 psi)

Maximum outlet pressure ... 1030 kPa (110 psi)

Electric

6V0890 (24V); 6V0927 (24V)

Rotation as viewed from drive end ... Clockwise

No load conditions at 25°C (77°F):

Speed ... 6950 ± 1650 rpm

Current draw ... 115 ± 25A

Voltage ... 23V

Clearance between pinion and housing (pinion clearance) ... 9.1 mm (.36 in)

(1) Torque for large terminal nuts ... 30.5 ± 3.5 N·m (270 ± 30 lb in)

(2) Torque for small terminal nuts ... 2.25 ± 0.25 N·m (20 ± 2 lb in)

(3) Torque for screws holding nose housing to lever housing ... 20.3 ± 2.7 N·m (15 ± 2 lb ft)

Solenoid

Current consumption (draw) at 25°C (77°F):

Pull in windings at 20V ... 49.3 ± 3.3A

Hold in windings at 20V ... 6.8A maximum

8C3644 (24V)

Rotation as viewed from drive end ... Clockwise

No load conditions at 25°C (77°F):

Speed ... 7643 ± 1683 rpm

Current draw ... 67.5 ± 7.5A

Voltage ... 23V

Clearance between pinion and housing (pinion clearance) ... 9.1 mm (.36 in)

(1) Torque for large terminal nuts ... 30.5 ± 3.5 N·m (270 ± 30 lb in)

(2) Torque for small terminal nuts ... 2.25 ± 0.25 N·m (20 ± 2 lb in)

(3) Torque for motor frame terminal ... 8 ± 3 N·m (70 ± 26 lb in)

Solenoid

Current consumption (draw) at 25°C (77°F):

Pull in windings at 20V ... 56.5 ± 4.5A

Hold in windings at 20V ... 14.6A

7T0794 (24V)

Rotation as viewed from drive end ... Clockwise

No load conditions at 25°C (77°F):

Speed ... 5500 rpm minimum

Current draw ... 140A maximum

Voltage ... 24V

(1) Torque for large terminal nuts ... 30.5 ± 3.5 N·m (270 ± 30 lb in)

(2) Torque for small terminal nuts ... 2.25 ± 0.25 N·m (20 ± 2 lb in)

Solenoid

Current consumption (draw) at 25°C (77°F):

Pull in windings at 24V ... 51A

Hold in windings at 24V ... 7A

9X4452 (24V)

Rotation as viewed from drive end ... Clockwise

No load conditions at 25°C (77°F):

Speed ... 3300 rpm minimum

Current draw ... 80A maximum

Voltage ... 23.5V

(1) Torque for 1/2 - 13 terminal nuts ... 30.5 ± 3.5 N·m (270 ± 30 lb in)

(2) Torque for 10 - 32 terminal nut ... 2.25 ± 0.25 N·m (20 ± 2 lb in)

(3) Torque for M10 × 1.5 terminal nut ... 17.5 ± 2.5 N·m (155 ± 22 lb in)

(4) Torque for bolt in end of terminal stud ... 1.5 ± 0.5 N·m (13 ± 4 lb in)

Solenoid

Current consumption (draw) at 25°C (77°F):

Pull in windings at 24V ... 103A

Hold in windings at 24V ... 19A

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