Brand: PRESTOLITE
The gear reduction starter motor is a high-quality replacement part designed for JCB 3CX and 4CX construction machines. Thanks to the integrated gear reduction, it delivers high starting torque while reducing current draw, ensuring reliable engine starting even in demanding operating conditions.
Technical Specification:
- Rated Power: 4.2 kW
- Type: Gear reduction starter motor
Function & Benefits:
- Reliable and fast engine starting.
- High efficiency due to gear reduction design.
- Reduced load on the electrical system.
- Built for heavy-duty use in construction machinery.
- Direct replacement – easy installation.
⚠️ Safety Warning
Before replacing the starter motor, always disconnect the negative (-) battery terminal. Short-circuiting the main power cable to ground may cause fire or serious injury.
Function in the Machine & Failure Diagnostics
The starter motor is a critical component of the engine starting system. Its failure completely prevents the engine from starting, leading to costly machine downtime.
Typical symptoms of starter motor failure:
No reaction when turning the ignition key (or only a clicking sound from the solenoid).
Slow or heavy cranking despite a fully charged battery.
Loud or unusual noises (grinding, whining) during starting.
Starter motor spins but does not engage the flywheel (“free spinning”).
Data sheet
Specific References
Manufacturer
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The gear reduction starter motor is a high-quality replacement part designed for JCB 3CX and 4CX construction machines. Thanks to the integrated gear reduction, it delivers high starting torque while reducing current draw, ensuring reliable engine starting even in demanding operating conditions.

















