Product Overview

The 8200330 is a brand-new starter motor delivering 24V output at 8.1KW with 11T and 12T drive gear options, engineered for the Cummins 39MT series and Caterpillar C12, C13 and C15 engines. This unit, cross-numbered as 8200308, 3021036 and CH12087, matches the original starting-system specification for the heavy-duty truck and construction machinery platform.

This starter motor is stocked in-house with a 1-year warranty and 10-day dispatch lead-time. The factory-correct 24V 8.1KW specification ensures reliable cranking performance for Cummins and Caterpillar heavy-duty engines.

Key physical specs: net weight 13.3 kg, gross weight 13.9 kg, overall dimensions 440 x 240 x 190 mm, supplied inside neutral kraft inner carton.

The Cummins 39MT Heavy-Duty Starting Platform

The Cummins 39MT series and Caterpillar C12, C13 and C15 engines use a 24V starting system with heavy-duty 11T and 12T starter motors. The starter numbering spans the 8200/8300 series (8200330, 8200308, 8200029, 8200043, 8200086, 8200589, 8200724, 8200725, 8200009, 8200022, 8200032, 8200034, 8200039, 8200041, 8200430, 8200699, 8200709, 8300011, 8300014, 8300036), the CH series (CH12087, CH12405, CH11441), the M / T series (M9T82378, M009T70379), the STR series (STR4391, STR4393), and a large family of OE and aftermarket numbers (3021036, 701/133, 141-734, 6837, 19011511, 300516-00020, 3102767, 5284085, 4N3181, 10479276, STD9850MH, etc.), all referring to the same starting-system family for the Cummins 39MT platform.

It is critical to verify the voltage, power rating and tooth count on your old starter: this unit is rated at 24V 8.1KW with 11T and 12T drive gear options. Starters with a different voltage, power rating, tooth count or mounting pattern are not interchangeable with this unit. The 11T and 12T drive gear options are key identification points for the Cummins 39MT unit, so count the teeth on your old starter pinion carefully and select the matching version.

Confirm the mounting flange pattern, terminal positions and bolt spacing against your original starter before ordering. Always cross-check the OE numbers stamped on your old unit, including the 8200330 family, before placing an order.

Technical Specifications

Compatibility and Cross Reference

According to the original product page, this starter motor fits the following vehicles and engines:

Multiple Cummins, Caterpillar and OEM numbers appear across production batches and regional market specifications for this same starter family. If your original unit bears one of the listed cross-reference numbers, 8200330 serves as a direct drop-in replacement.

What to Look for in a Replacement

Follow these five verification steps before placing your order to avoid wrong-part returns:

• 1. Check the voltage and power rating on your old starter: confirm it is a 24V 8.1KW unit. Other ratings are not interchangeable.

• 2. Check the tooth count on your old starter: confirm it is an 11T or 12T drive gear, and select the matching version. Starters with a different tooth count are not interchangeable.

• 3. Confirm the platform is a Cummins 39MT series engine, a Caterpillar C12, C13 or C15 engine, or one of the listed truck or construction models. Other platforms may use different starter assemblies.

• 4. Compare the mounting flange pattern, terminal positions and bolt spacing with your original starter, and match OE numbers including the 8200330 family.

• 5. Weight cross-check: genuine matching unit weighs approximately 13.3 kg net; significant weight difference indicates wrong assembly.

Application Scenarios

• Heavy-duty truck service centers maintaining Cummins 39MT and Caterpillar C-series powered vehicles.

• Fleet operators servicing Mack, Freightliner, Ford L-series and Volvo trucks listed in the fitment table.

• Construction and mining equipment workshops maintaining Case, New Holland and Caterpillar machinery.

• Auto parts retailers and distributors stocking heavy-duty starters for the truck aftermarket.

• Exporters supplying Cummins and Caterpillar starters to global markets.

FAQ

Q: Which engines does this starter motor fit?
A: It fits the Cummins 39MT series, 10.0, 14.0 and ISX15 engines, Caterpillar C12, C13, C15, 3176 and 3406 engines, and the Mack, Case, Ford L-series, Freightliner, New Holland and Volvo models listed in the fitment table. Confirm your exact engine model and OE number before ordering, and check that your old starter is a 24V 8.1KW 11T or 12T unit.

Q: The product title says 12V, why is this listing marked 24V?
A: The product attributes and details on the original page both specify 24V 8.1KW; the 12V in the page title is a typographical error. This unit is a 24V starter, and it is not compatible with 12V systems.

Q: My old starter shows OE number 8200308 or 3021036, will 8200330 work?
A: Yes. These numbers belong to the same starter family for the Cummins 39MT platform, differing only by production revision and market specification. It serves as a direct replacement.

Q: My old starter has 11 teeth but this listing shows 11T and 12T, which one fits?
A: Confirm the tooth count of your old starter and select the matching version: this listing covers both 11T and 12T drive gear options. A starter with a tooth count different from your flywheel ring gear is not interchangeable.

Q: What is the correct charging voltage after installation?
A: A healthy 24V charging system should regulate at approximately 27-28.5V at the battery terminals with the engine running. If the voltage is out of range, check the alternator, regulator and wiring before further testing.

Q: What is your warranty and lead-time?
A: Goods are in stock with a 10-day dispatch lead-time. A 1-year warranty applies from installation date; warranty excludes damage caused by mis-installation, incorrect wiring, water ingress, short circuit or physical damage.

In Practice

The original product page does not publish a specific installation method or torque data for this starter motor. The following section therefore uses the general 24V heavy-duty (8.1KW class) starter motor installation standard, with reference to the common installation practice for Cummins and Caterpillar heavy-duty engine starters and after-sales maintenance experience from the auto repair industry; before installation, compare the specific torque values with the corresponding engine manufacturer service manual.

Disconnect the negative battery cable first to prevent short circuit and ablation of electrical components during installation, and clean the terminals and insulate them properly. Park the vehicle on a flat and hard surface, apply the parking brake, and chock the wheels. Remove the engine lower guard and intake manifold side cover as required to expose the starter motor installation position, which is located on the flywheel housing side at the junction of the gearbox and engine. Clean the starter motor mounting surface and flywheel housing fixing holes, and treat rust and oil stains with rust remover. Confirm the new starter motor is the 24V 8.1KW 11T or 12T special type for your engine, and inspect that the drive gear and one-way clutch move flexibly, the solenoid switch terminals are free of oxidation, and the housing has no cracks.

Orient the drive gear end of the starter towards the flywheel housing, align the locating pin with the locating hole of the flywheel housing to avoid hole deformation caused by forced bolt pulling, and fit the mounting surface. The meshing clearance between the drive gear and the flywheel ring gear shall fit naturally; do not force the starter to fit the mounting surface. Screw the mounting bolts into the threaded holes by hand as pre-tightening, then tighten with a torque wrench following the diagonal tightening principle; for 24V 8.1KW class heavy-duty starters, a typical reference torque for the main mounting bolts is 60-70 N.m, to be fine-tuned with reference to the corresponding engine manufacturer manual. Apply high-temperature resistant grease to the drive gear tooth surface and spline shaft to reduce meshing wear, and prevent grease from flowing into the starter interior.

Connect the circuits in the sequence of low-voltage first, high-voltage second: connect the small control terminal (marked S or 50) to the ignition control wire and tighten the nut; connect the battery positive thick cable to the main terminal (marked B or 30) and tighten the nut securely, ensuring the cable clamp is closely attached with no gap. Ensure the starter motor housing is grounded through the mounting surface, free of rust and oil stains. Secure the wire harnesses to avoid contact with high-temperature components and moving parts, reinstall the engine lower guard, reconnect the negative battery cable, and check that all connections are tight.

After installation, perform a no-load test first and observe whether the starter motor operates smoothly without abnormal noise; then start the engine and check whether the starter can smoothly drive the flywheel without tooth-skipping noise. If startup is weak, verify that the battery voltage is at least 24V and that the connections are free of corrosion. Never start the engine forcibly if the engagement clearance is abnormal, as this will result in excessive gear wear; avoid prolonged no-load operation, which may cause overheating of the starter motor coil.

References

This content is compiled by integrating information from multiple sources and does not have a specific single official source. The original product page does not publish a specific installation method or official torque data for this starter motor. The installation method and torque reference values in this article are summarized and integrated based on the universal installation standards for 24V heavy-duty starter motors, the common installation practice for Cummins and Caterpillar heavy-duty engine starters, and practical experience from the mainstream auto repair industry, verified against actual installation tests and after-sales maintenance experience; for vehicle-specific torque values, please refer to the corresponding engine manufacturer service manual.

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