22U-01-21310 22U0121310 Clutch Damper Disc for Komatsu PC200 PC220

22U-01-21310 Disk Damper for Komatsu Excavator

The 22U-01-21310 / 22U0121310 disk damper is used for Komatsu excavator flywheel coupling and hydraulic pump drive system applications. It is also searched as a clutch damper disc, clutch plate, disk coupling, pump coupling disc or flywheel damper disc for Komatsu excavator service.

This page focuses on 22U-01-21310 as the main part number. Before ordering, the removed disc should be checked by old part number, teeth count, outside diameter, inside diameter, thickness, bolt holes, center hole, mounting face and machine serial number.

Komatsu PC200 PC220 PC270 Application Reference

Common machine references for 22U-01-21310 include Komatsu PC200-7, PC200-8, PC200LC-7, PC200LC-8, PC220-7, PC220-8, PC220LC-7, PC220LC-8, PC270-7 and PC270-8 excavator models.

Some public listings also mention SAA6D102E-2C engine-related references, as well as PC160LC-7, PC228US-3, PC230-7, PC240-8K, PC290-8K and PC290LC-10 checking references. These extended model references should be verified by the old damper disc and machine serial number before shipment.

Do not select this part by machine model alone. Similar Komatsu excavators may use different damper discs depending on production version, engine arrangement, hydraulic pump drive layout and previous repair history.

Part Number and 16T Checking Notes

The main part number for this page is 22U-01-21310. The no-hyphen format 22U0121310 is also commonly used in supplier catalogs and buyer searches.

Public listings commonly describe this product as a 16T disk damper or 16T clutch damper disc. This teeth count should be checked against the removed disc before ordering, especially when the buyer only provides the machine model.

To keep this page focused, 22U-01-21310 should remain the primary search signal. Related model names and technical notes should support fitment checking, not replace old part confirmation.

Clutch Damper Disc Function

The clutch damper disc is installed in the engine rear drive and hydraulic pump coupling area. It helps transmit torque while reducing torsional vibration and shock load between the engine flywheel side and the driven hydraulic pump system.

When the damper disc is worn, cracked or incorrectly matched, the machine may develop abnormal vibration, coupling noise, unstable hydraulic pump drive response or repeated coupling damage. Correct disc selection is important because teeth count, diameter, center hole, bolt holes and mounting layout must match the original system.

How to Identify the Correct 22U-01-21310 Disc

• Check whether the old part number matches 22U-01-21310 or 22U0121310.

• Confirm the teeth count, especially when the buyer only provides model information.

• Measure outside diameter, inside diameter and disc thickness.

• Compare bolt hole quantity, bolt circle and mounting face layout.

• Check the center hole, spline or coupling center structure according to the old disc.

• Confirm machine model and serial number when the old number is missing or unreadable.

Common Failure Symptoms

• Abnormal vibration from the engine rear side or hydraulic pump coupling area.

• Knocking, rattling or impact noise during engine start, stop or load change.

• Visible cracks, broken damping elements, damaged teeth or worn friction surface.

• Hydraulic pump drive interruption caused by disc or coupling failure.

• Repeated coupling failure caused by misalignment, loose bolts or incorrect replacement part.

• Excessive vibration after replacement caused by wrong teeth count, wrong thickness or incorrect mounting direction.

Troubleshooting Before Replacement

Before replacing the 22U-01-21310 disk damper, inspect the complete flywheel coupling and hydraulic pump drive area. Damper disc failure may be caused by normal wear, but it can also be related to pump misalignment, loose mounting bolts, engine vibration or previous incorrect installation.

• Check coupling hub, flywheel side and pump input side for wear or damage.

• Inspect mounting bolts, washers and spacer parts before installing a new disc.

• Check engine mounts and hydraulic pump mounting bracket for looseness or misalignment.

• Inspect flywheel housing and pump drive housing if repeated damper failure occurs.

• Confirm whether the old disc failed from wear, misalignment, overload, loose bolts or wrong replacement part.

Installation and Maintenance Notes

• Compare the old and new disc before installation, including teeth count, diameter, thickness, center hole and bolt holes.

• Clean the mounting face and remove debris before assembly.

• Replace damaged bolts, washers or spacer parts when required.

• Tighten bolts evenly according to the service procedure to avoid uneven stress.

• Check alignment between engine flywheel side and hydraulic pump drive side before startup.

• After installation, check abnormal vibration, noise and pump drive response during low-load testing.

Information Needed Before Ordering

To reduce wrong orders, please send the old disc number, Komatsu machine model, machine serial number, front and rear photos of the old disc, teeth count, outside diameter, inside diameter, thickness, bolt hole photo and any visible marks before quotation.

FAQ

Q: What is 22U-01-21310?

22U-01-21310 is a Komatsu disk damper or clutch damper disc reference used in excavator flywheel coupling and hydraulic pump drive applications.

Q: Is 22U0121310 the same search format?

Yes. 22U0121310 is the no-hyphen format of 22U-01-21310 and is commonly used in supplier catalogs and buyer searches.

Q: Which Komatsu models are common references?

Common checking references include Komatsu PC200-7, PC200-8, PC220-7, PC220-8 and PC270-8. Other PC160, PC228, PC230, PC240 and PC290 references should be verified by the old disc and machine serial number.

Q: Is this a 16T disk damper?

Public listings commonly describe this part as a 16T disk damper. The teeth count should still be checked against the removed disc before ordering.

Q: Can this part be selected only by machine model?

No. Similar Komatsu models may use different damper discs. The old part number, teeth count, disc dimensions and physical layout should be checked before ordering.