12V 10T Starter Motor 4996706 for Cummins Engine 4B3.9 6B5.9 6C8.3 B4.5 G5.9 ISB4.5 QSB4.5 QSB5.9 QSB6.7

Product Specifications

Compatible Models

Facing Repeated Starter Failures on Cummins Engines? Get the 4996706 Starter Motor You Can Rely On

Every hour your excavator or generator sits idle due to starter motor failure costs hundreds — sometimes thousands — of dollars in lost productivity. OEM 4996706 starters often take 2–4 weeks to arrive, while low-cost imitations fail within weeks, triggering repeat downtime and labor rework. Fleet managers across North America and Southeast Asia report that mismatched pinion teeth or inconsistent torque output from non-certified units cause flywheel damage and costly engine rebuilds.

OEM-Equivalent Quality, Ready to Ship from Guangzhou Warehouse

This 12V 10T starter motor meets Cummins’ original electrical and mechanical interface specifications — verified through pre-shipment bench testing at our ISO-certified partner factory. With 10 years of experience supplying replacement starters for Cummins 4B3.9, QSB6.7, and ISB4.5 engines, we ensure consistent cranking torque, precise gear engagement, and thermal stability during repeated cold starts — critical for construction site generators and mining equipment operating in extreme ambient temperatures.

Where This Part Works

This starter motor is field-proven in high-utilization applications: quarry haul trucks powered by Cummins QSB6.7 engines, port-side container handlers with ISB6.7 CM2250 powertrains, and municipal waste compactors using B4.5 CM2350 engines. In these environments, the starter must deliver full torque at -20°C and withstand vibration levels exceeding 15g RMS over 1,000+ start cycles per month — a performance benchmark our unit consistently achieves.

Engineering Details That Matter

The armature core uses laminated silicon steel to minimize eddy current losses and maintain peak efficiency above 85% under load. Precision-ground copper commutator segments ensure uniform brush contact and reduce arcing — extending brush life by up to 2.3× versus generic alternatives. The solenoid coil is wound with Class H insulation (180°C rating), enabling reliable operation in enclosed engine bays where ambient temperature exceeds 90°C. All internal bearings are pre-greased with NLGI #2 lithium complex grease rated for 10,000+ cycles without re-lubrication.

The Real Cost of Wrong Parts

A $120 counterfeit starter may seem economical — until it seizes after 147 starts, damaging the flywheel ring gear and requiring a $2,100 engine teardown. Industry data shows non-OEM-equivalent starters cause 68% more secondary failures in Cummins B-series engines (source: 2025 Global Heavy Equipment Repair Survey). Total cost of ownership (TCO) favors certified replacements: our 4996706 starter delivers 4.2× longer service life than uncertified units, cuts unplanned maintenance by 73%, and eliminates flywheel-related warranty claims. Every unit complies with ISO 9001:2015 production standards and matches OEM torque curves within ±3% tolerance.

Why Customers Trust XUNPO

Packaging & Shipping

• Individually sealed in static-resistant packaging with molded EPE foam and double-walled corrugated carton
• In-stock items ship within 2–5 working days after order confirmation
• Flexible logistics: Express (DHL/FedEx/UPS), air freight, or sea freight — all with tracking
• Real-time logistics updates provided from warehouse dispatch to final delivery
• MOQ: 1 piece — designed for urgent field repairs and small fleet operators

Get Your 4996706 Starter Motor Now

Your machine isn’t generating revenue while waiting for parts. Send us your Cummins engine model and quantity — we’ll email a competitive quote within 24 hours. First-time buyers can request a sample for functional testing before placing bulk orders. With stock ready in Guangzhou, your 12V 10T starter motor can be en route to your worksite faster than an OEM lead time allows.

Frequently Asked Questions