Part No.: 77017179 Name: Starter Motor / Electric Starter Brand: c Application: Suitable for underground and surface rock drills including Sand-vik DD422i, DD421, matched with starting systems of diesel engines. Function: Drives cold start of the engine and delivers high torque to crank the engine for ignition. Designed for heavy-load and high-dust working conditions in mines. Structure: 24V DC brushed motor + planetary reduction gear + electromagnetic engagement switch Weight: Approx. 9.5–11.5 kg

Rated Voltage: 24V DC Rated Power: 4.0 kW (Peak power: approx. 5.5 kW) Teeth / Module: 10T / Module 3 Rotation Direction: Clockwise (CW) Insulation Class: Class H (Heat resistance up to 180℃) Ingress Protection: IP54 (Dust-proof and splash-proof) Compatible Engines: Cum mins / Deutz series industrial diesel engines Material: Die-cast aluminum housing, high-strength alloy gears, high-temperature resistant copper coils

Verify voltage, power and gear teeth before installation to ensure compatibility with the engine flywheel. Fastening bolt torque: 85–95 N·m. Ensure lock washers are properly installed. Keep terminals clean and free of oxidation. The cross-section of positive cable shall be no less than 50mm² to reduce voltage drop. Inspect carbon brush wear and commutator condition every 500 working hours. Prevent water and dust ingress. Common faults: Idling (gear slipping), failed engagement of solenoid, insufficient power (low voltage or worn carbon brushes).