24V 5.5KW 10T Starter Motor IMS101316 for Buses, combine harvesters, tractors

Overview of the IMS101316 Starter Motor

The IMS101316 starter motor is a 24V, 5.5 kW unit built for Buses, combine harvesters, tractors. It is a reduction-gear starter with a pre-engaged solenoid, assembled to the original mounting flange and terminal positions so it fits without adapters or wiring changes.

Every unit is bench tested at the factory for current draw, solenoid pull-in and pinion throw, because those three values decide whether a starter works in a cold engine bay as well as it does on a test bench.

Technical Summary

• Rated voltage: 24V
• Rated output: 5.5 kW
• Pinion: 10 teeth
• Type: reduction gear starter with pre-engaged solenoid
• Application: Buses, combine harvesters, tractors
• Net weight: approximately 10.35 kg
• Condition: new, direct replacement for the original unit

A 24V 5.5 kW rating is the output the motor can hold while cranking, not a peak figure. It is sized so the engine reaches starting speed on the first or second revolution, which is what makes a healthy start feel immediate.

A pre-engaged solenoid pushes the pinion into mesh before the main contact closes, which prevents the tooth damage that occurs when a motor spins up against a stationary ring gear.

Reference Numbers and Cross References

The starter is supplied against the following references, which help identify it against the unit already fitted to the vehicle:

• IMS101316
• AZF4581
• M9T9122
• M9T9122AE
• AZF4581AE
• 11.132.124
• AZF4201
• STI4581MH
• STI4581SU
• STR8581ZL
• STR4581ZL
• STI4581WA
• STR4581WA
• M9T.9122
• ST-142T
• ST142-3708000-10

Starter suppliers revised this design more than once during production. Confirm the number on the old unit, or send a photograph of the drive end, before committing to an order. This starter is listed with 16 references in total.

Application Notes

The unit is listed for Buses, combine harvesters, tractors. Because manufacturers changed starter suppliers during the production run, the safest check is the number stamped on the starter body, not the model year alone. On Buses, combine harvesters, tractors installations, access to the IMS101316 usually decides how long the job takes.

A mismatched pinion is the most common cause of a starter that engages noisily or refuses to mesh. Compare the tooth count before fitting, not after.

What Wears Out First

Oil or coolant mist from a leaking seal finds its way into the drive end housing, mixes with carbon dust and forms a conductive paste. The starter then arcs internally and fails early, whatever its mileage.

Heat is the underlying cause in most cases. The starter sits close to the exhaust, and after a hot shutdown the solenoid winding and brush plate soak in heat with no airflow. Resin hardens, springs lose tension and the contact oxidises. The IMS101316 ships with its solenoid fitted, so no parts have to be transferred from the old unit.

Symptoms of a Failing Starter

• Cranking that sounds normal but takes longer than it used to
• Several attempts needed before the motor engages
• Black carbon dust inside the drive end housing
• Voltage dip that dims the lights during cranking
• Starter that responds to a tap on the housing but not to the key alone

A cranking voltage test separates the starter from the rest of the circuit. If battery voltage stays healthy at the terminals but drops sharply at the starter stud, the cable or the connection is at fault rather than the motor. The IMS101316 is built to the same flange pattern as the unit it replaces.

Checks Before Installation

• State of charge and age of the battery
• Corrosion on the earth strap and the engine-to-body bond
• Pinion tooth count against the ring gear
• Free movement of the new pinion before fitting
• That the signal wire connector seats fully on the solenoid

Fitting a new starter onto a worn ring gear or a marginal battery shortens its life. Check the simple items first, then fit the unit once and correctly.

Fitting the Replacement

With the battery isolated, remove any heat shield or ducting that blocks access and disconnect the main cable and solenoid connector. Support the unit before the mounting bolts come out; these starters are heavy enough to damage surrounding parts if they drop.

Clean the mounting face and inspect the ring gear teeth through the starter aperture. Fit the replacement with the original bolts, reconnect the cables in the same order and tighten the main terminal firmly. Crank the engine briefly and listen for clean engagement and release. The IMS101316 ships with its solenoid fitted, so no parts have to be transferred from the old unit.

Quality Control and Supply from Hejian Nuojin Auto Parts Co., Ltd.

Hejian Nuojin Auto Parts Co., Ltd. manufactures starter and alternator components for the aftermarket. Every unit is bench tested for no-load current draw, solenoid pull-in and release voltage, pinion throw and running noise before packing.

Standard references are held as spot goods, volume orders are delivered in around 30 days, and every unit carries a one-year warranty against manufacturing defects.

Frequently Asked Questions

Can I test the starter on the bench?

Yes. Apply battery voltage to the main stud and the signal terminal and check that the pinion throws and the motor turns. A clamp meter reading against the rated current will show whether the unit is drawing too much.

Can the solenoid be replaced on its own?

Yes, when the motor tests well and only the contact has burnt. On a starter with high mileage the complete unit is usually better value, because the brushes and pinion are close behind.

How long should a replacement starter last?

There is no fixed interval, but a starter fed by a healthy battery and a clean earth path will outlast one that is repeatedly cranked on a low battery.

Does this starter come with the solenoid?

The starter is supplied as a complete assembly including the solenoid. Reuse the original mounting bolts if they are in good condition.