430mm Truck Clutch Kit: How to Identify the Right Cover and Disc

13 November 2026 · Clutch systems

A 430mm clutch kit is not one part. It is a matched pair — a pressure cover and a driven disc — that only works when the diameter, spline, release mechanism and flywheel pattern all agree. Most wrong deliveries in this category come from ordering a cover by part number alone and assuming the disc follows.

What is inside a 430mm kit

• Cover assembly (pressure plate) — the spring-loaded half that bolts to the flywheel.
• Driven disc — carries the friction lining and the hub spline that engages the gearbox input shaft.
• Release bearing — usually ordered separately; confirm whether your release is pull or push type.
• Alignment tool and fasteners — not always included; check before quoting a job.

The five checks before you order

1. Cover outside diameter. A 430mm cover will not fit a 400mm flywheel recess even if the bolt pattern looks close.
2. Disc diameter and lining thickness. Discs in the same family differ in lining thickness and hub height.
3. Spline count and shaft diameter. Measured on the gearbox input shaft, not on the old disc alone.
4. Flywheel bolt pattern. Count, spacing and dowel position.
5. Release mechanism. Pull-type and push-type covers are not interchangeable.

Examples of 430mm kits in the catalogue

Why the disc number matters as much as the cover

The same cover is frequently supplied with several different discs. In this catalogue, ISUZU cover ISC518-1 appears with at least two disc numbers, and Mercedes-Benz cover 3482081232 appears with more than one disc. If you quote only the cover, the disc may be wrong for the gearbox in front of you.

ISUZU ISC518-1 / ISD078U and ISC518-1 / ISD002 share a cover and differ in disc.

Installation points that decide service life

• Check flywheel flatness and surface finish; a worn flywheel shortens a new disc's life.
• Replace the release bearing and pilot bearing with the kit, not later.
• Clean the spline and apply the specified high-temperature grease sparingly.
• Torque the cover bolts in steps and in a cross pattern.
• Check pedal free play and release bearing clearance after assembly.

Ordering checklist

Send us: chassis number, gearbox model, cover number, disc number and the measured cover diameter. With those five items we can confirm the matched set instead of guessing from the cover alone.

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