C9 Urban Transit Bus Engine Caterpillar


Electric Starting Motor

Usage:

C-9 MTB

207-1556




Illustration 1g00286672



Illustration 2g00286673

When the electric starting motor is viewed from the pinion end, the motor rotates in the following direction. ... Clockwise

No load conditions at 25°C (77°F)

Speed ... 7643 ± 1683 rpm
Current draw ... 76.5 ± 14.5 amp
Voltage ... 23 V

(1) Three wires are the maximum between the nuts. Tighten the nut on the battery terminal to the following torque. ... 30.5 ± 3.5 N·m (21 ± 3 lb ft)

(2) Tighten the nut on the ground terminal to the following torque. ... 30.5 ± 3.5 N·m (21 ± 3 lb ft)

(3) Tighten the ground terminal on the solenoid to the following torque. ... 2.25 ± 0.25 N·m (20 ± 2 lb in)

(4) The switch terminal must be insulated with heat shrink tube. Tighten the nut on the switch terminal to the following torque. ... 2.25 ± 0.25 N·m (20 ± 2 lb in)

(5) Tighten the nut on the motor terminal to the following torque. ... 30.5 ± 3.5 N·m (21 ± 3 lb ft)

(6) Tighten the bolt on the motor frame terminal to the following torque. ... 8 ± 3 N·m (70 ± 27 lb in)

Solenoid

Current draw at 20 V and 25°C (77°F)

Pull-in windings ... 57 Amp
Hold-in windings ... 16 Amp

237-1962




Illustration 3g00362864



Illustration 4g00367673

When the electric starting motor is viewed from the pinion end, the motor rotates in the following direction. ... Clockwise

No load conditions at 25°C (77°F)

Speed ... 6950 ± 1650 rpm
Current draw ... 115 ± 25 amp
Voltage ... 23 V

(1) Tighten the nut on the ground terminal to the following torque. ... 30.5 ± 3.5 N·m (21 ± 3 lb ft)

(2) Three wires are the maximum between the nuts. Tighten the nut on the battery terminal to the following torque. ... 30.5 ± 3.5 N·m (21 ± 3 lb ft)

(3) Tighten the ground terminal on the solenoid to the following torque. ... 2.25 ± 0.25 N·m (20 ± 2 lb in)

(4) The switch terminal must be insulated with heat shrink tube. Tighten the nut on the switch terminal to the following torque. ... 2.25 ± 0.25 N·m (20 ± 2 lb in)

(5) Tighten the nut on the motor terminal to the following torque. ... 30.5 ± 3.5 N·m (21 ± 3 lb ft)

(6) Tighten the nut on the motor frame terminal to the following torque. ... 30.5 ± 3.5 N·m (21 ± 3 lb ft)

Solenoid

Current draw at 20 V and 25°C (77°F)

Pull-in windings ... 49.3 ± 3.3 Amp
Hold-in windings ... 6.8 Amp maximum

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