3126B Industrial Engine Caterpillar


Electric Starting Motor

Usage:

SPP101 715

106-8557 Electric Starting Motor Gp




Illustration 1g00726271



Illustration 2g00726283

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

No load conditions at 25°C (77°F)

Speed ... 6800 RPM minimum
Current ... 155 amp maximum
Voltage ... 23 V

(1) Tighten the nut on the battery terminal to the following torque. ... 30.5 ± 3.5 N·m (22 ± 3 lb ft)

(2) Tighten the ground terminal to the following torque. ... 30.5 ± 3.5 N·m (22 ± 3 lb ft)

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

Note: The switch terminal must be insulated with heat shrink tubing. Do not use molded terminals.

(4) Tighten the nut on the motor terminal to the following torque. ... 30.5 ± 3.5 N·m (22 ± 3 lb ft)

(5) Tighten the nut on the motor frame terminal to the following torque. ... 25 ± 7 N·m (18 ± 5 lb ft)

Solenoid

Current draw at 24 V and 25°C (77°F)

Pull-in windings ... 64 amp at 24 V
Hold-in windings ... 10 amp at 24 V

Mounting Position




Illustration 3g00726327

(A) The electric starting motor must be engine mounted with the start solenoid: ... 15° minimum above horizontal

(B) Allowable range

106-8559 Electric Starting Motor Gp




Illustration 4g00282688

Typical example




Illustration 5g00489813

Typical solenoid connections

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

No load conditions at 25°C (77°F)

Speed ... 8450 ± 1250 RPM
Current ... 65 ± 15 amp
Voltage ... 23 V

(1) Tighten the nut on the battery terminal to the following torque. ... 30.5 ± 3.5 N·m (22 ± 3 lb ft)

(2) Tighten the ground terminal to the following torque. ... 30.5 ± 3.5 N·m (22 ± 3 lb ft)

(3) Tighten the nut to the following torque. ... 2.25 ± 0.25 N·m (20 ± 2 lb in)

(4) 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. ... 14.7 ± 3.4 N·m (11 ± 3 lb ft)

Note: The internal torx screw must be held during tightening or loosening of the motor terminal nut.

(6) Tighten the nut on the motor frame terminal to the following torque. ... 8 ± 3 N·m (71 ± 27 lb in)

Solenoid

Current draw at 20 V and 25°C (77°F)

Pull-in windings ... 56.5 ± 4.5 amp at 20 V
Hold-in windings ... 14.6 amp at 20 V

Mounting Position




Illustration 6g00726327

(A) The electric starting motor must be engine mounted with the start solenoid: ... 15° minimum above horizontal

(B) Allowable range

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