Product Overview

The 2873K405 is a heavy-duty starter motor delivering 12V output at 3.0KW with a 10-tooth drive gear, engineered for Perkins engines used in FARMTRAC, Massey Ferguson and McCormick tractors. This unit, cross-numbered as 2872K405 and 428000-1290, matches the original starting-system specification for the Perkins engine platform.

Fitted with reduction-gear drive design, this brand-new engine starter is stocked in-house with a 1-year warranty and 10-day dispatch lead-time. The factory-correct rating ensures reliable cold and hot cranking of the Perkins diesel engine.

Key physical specs: net weight 5.9 kg, gross weight 6.2 kg, overall dimensions 240 x 120 x 160 mm, supplied inside neutral kraft inner carton.

The Perkins Engine Platform and 12V Starting System

Perkins 1004-40, 1004-4T, 1004-42, 1006.6T, 1103D and 1104D engine families run standard 12V starting systems with factory-spec starter motors. The starter motor numbering spans the Perkins OE numbers (2873K405, 2872K405, 2873K634, 428000-1290), the Lester number 18940, the Lucas LRS/STR series and multiple aftermarket series, all referring to the same starting-system family.

This starter serves a wide range of Perkins-powered tractors, including FARMTRAC 690 DT (1104D-44T), FARMTRAC 7110 DT (1104D-44TA), FARMTRAC 7100 DT (1104DT-44T), Massey Ferguson MF 6225, MF 4345, MF 4355, MF 4370, MF 291/291K, MF 330S, MF 4320, MF 4325, MF 4335, MF 435, MF 4360, MF 440, MF 445, MF 455, MF 460, MF 875, MF 5455, and McCormick MC 120 P6 / MC 135 P6 models.

It is critical to verify the drive-gear tooth count on your old starter: this unit uses a 10-tooth drive gear. Starters with a different tooth count or mounting pattern are not interchangeable with this unit. A starter with the wrong tooth count will not engage properly with the flywheel ring gear.

The 12V 3.0KW rating matches the original starting-system specification. 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 2873K405 family, before placing an order.

Technical Specifications

Compatibility and Cross Reference

This starter motor fits Perkins engines and Perkins-powered FARMTRAC, Massey Ferguson and McCormick tractors. Do not rely solely on the brand name for fitment validation; always compare the original part number, mounting holes, gear teeth and connector configuration before ordering.

Multiple Perkins, JCB, Lucas and aftermarket OE numbers appear across production batches and regional market specifications for this same starter motor family. If your original unit bears one of the listed cross-reference numbers, 2873K405 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 label on your old starter: confirm it is rated for 12V 3.0KW. Other ratings are not interchangeable.

• 2. Count the drive-gear teeth: this unit uses 10T (10-tooth). Starters with a different tooth count, including 8T or 9T units, are incompatible.

• 3. Confirm the platform is a Perkins engine family (1004, 1006, 1103, 1104). Other engines may use different starter assemblies.

• 4. Compare the mounting holes, flange pattern and connector configuration with your original starter, and match OE numbers including the 2873K405 family.

• 5. Weight cross-check: genuine matching unit weighs approximately 5.9 kg net; significant weight difference indicates wrong assembly.

Application Scenarios

• Agricultural machinery repair shops servicing Perkins-powered FARMTRAC, Massey Ferguson and McCormick tractors.

• Farm and agricultural parts distributors stocking heavy-duty starting-system components for the Perkins engine market.

• Industrial equipment maintenance teams maintaining Perkins-powered generator sets and construction machinery.

• Used agricultural equipment traders refurbishing pre-owned Perkins-powered tractors for global secondary markets.

• Cost-conscious buyers looking for a reliable new starter motor at a competitive price.

FAQ

Q: Which engines does this starter fit?
A: It fits Perkins engines, including the 1004-40, 1004-4T, 1004-42, 1006.6T, 1103D and 1104D families, used in FARMTRAC, Massey Ferguson and McCormick tractors. Confirm your engine model and OE number before ordering.

Q: My old starter shows OE number 2872K405 or 428000-1290, will 2873K405 work?
A: Yes. These numbers belong to the same starter motor family for the Perkins platform, differing only by production revision and market specification. It serves as a direct replacement.

Q: Can I fit this starter onto other engine brands?
A: No. Different engine families use different starter mounting patterns, drive-gear tooth counts and terminal layouts. Confirm your engine model before ordering.

Q: What is the correct operation after installation?
A: The engine should crank briskly and consistently on cold and hot starts. If the starter spins but the engine does not crank, check the drive-gear engagement and ring gear condition.

Q: The page lists a gross weight of 6.2G, is this a typo?
A: Yes, 6.2G is a typo for 6.2KG on the product page. The net weight is 5.9 kg and the gross weight is 6.2 kg.

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

For technicians working on Perkins 12V engines: Before removing the existing starter motor, confirm the engine is off and the battery is disconnected at the negative terminal first, and park the machine on a flat surface with the parking brake engaged. Remove the battery cable from the B+ terminal of the solenoid, noting the correct orientation of each connection, and label or photograph the wiring before disconnecting.

Remove the mounting bolts supporting the starter motor and lower it from the flywheel housing, taking care not to damage the flywheel ring gear or wiring. Compare the new starter against the old unit: verify mounting flange, bolt spacing, the 10-tooth drive gear and connector configuration. Clean the mounting surface, position the new starter, and tighten mounting bolts in stages to factory torque (typically 35-45 N.m). Reconnect the solenoid wiring and battery cable, ensuring terminals are clean and tight.

After installation, reconnect the battery and carry out a cranking test: the starter should engage promptly with a clean, crisp sound and no grinding or whine. Confirm the engine starts consistently on repeated attempts. Inexperienced mechanics are recommended to entrust replacement work to a qualified equipment service shop.

References

Parameters, engine applications and installation specifications are compiled based on Perkins official service documentation for the 1000 Series engine families (1004, 1006, 1103, 1104), OEM starter motor technical standards (2873K405, 2872K405, 428000-1290), Massey Ferguson, FARMTRAC, McCormick and JCB equipment application data, and general automotive industry standards for starter motor installation, verified against actual machine installation tests and after-sales maintenance experience.

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