RAParts 836100M91 Piston Ring Set for Allis Chalmers Tractors

In this review the RAParts 836100M91 piston ring set is evaluated for owners of vintage Allis Chalmers and compatible Massey Ferguson tractors who need a reliable, affordable replacement. The bottom line: this aftermarket set is aimed at practical users who need a complete six-piece ring set to restore compression and oil control without paying OEM premiums. Our review finds it delivers the right sizes and fit references for common models such as 135, 150, B, C and CA, making it a sensible parts choice for routine engine rebuilds and seasonal maintenance.

Key Features

• Complete six-piece set: Includes top, second, third and oil rings so the user receives everything needed for one cylinder rebuild in a single purchase.
• Measured ring sizes: Rings supplied to listed thicknesses (.123,.1235 and.1825 in) which helps match worn cylinders and maintain correct piston-to-wall clearance.
• Aftermarket replacement: Offers a lower-cost alternative to OEM numbers provided for identification, useful for budget-conscious restorations.
• Wide model fitment: Stated to fit multiple Allis Chalmers and Massey Ferguson models including 135, 150, B, 1B, C and CA which simplifies ordering for common vintage tractors.
• Reference OEM numbers: Includes several OEM reference numbers to cross-check compatibility before installation and reduce fitment errors.

Who It's For

This ring set is best for tractor owners, hobbyist mechanics and small repair shops working on older Allis Chalmers or compatible Massey Ferguson engines who need a straightforward replacement set for routine rebuilds. It is particularly useful when original OEM parts are costly or scarce and a measured aftermarket alternative is acceptable.

Those who should look elsewhere include restorers who require factory-branded parts for show-quality projects or owners who need multi-cylinder sets or matched oversize rings not listed here. Always verify fitment against engine bore and OEM cross-reference numbers before ordering.

Pros & Cons

Pros

• Complete six-piece set reduces the need to source individual rings separately.
• Clear thickness specifications allow matching to worn cylinder tolerances.
• Broad fitment listing covers many common Allis Chalmers and Massey Ferguson models.
• Cost-effective aftermarket option for routine engine work.

Cons

• Aftermarket designation means fit and finish may vary from original equipment, so careful verification is prudent.
• Only one cylinder worth of rings is included, so multiple cylinders require multiple sets.

Specifications

Part type	Piston ring set
Pieces included	Six total rings
Top ring thickness	.123 in
2nd and 3rd ring thickness	.1235 in
Oil ring thickness	.1825 in
Fitment	Allis Chalmers and Massey Ferguson models 135, 150, B, 1B, C, CA
Manufacturer type	Aftermarket replacement

Our Verdict

For mechanics and owners restoring or maintaining older Allis Chalmers and compatible Massey Ferguson tractors, the RAParts 836100M91 piston ring set is good value: it supplies the full six-piece configuration and clear thicknesses at a lower cost than many OEM options. Verify fitment using the provided reference numbers and plan to buy multiple sets for multi-cylinder engines, but otherwise this is a practical, budget-friendly choice for routine engine rebuilding.

Frequently Asked Questions

Will this set fit my Allis Chalmers 135?
Yes; the product lists fitment for model 135, but you should verify bore size and OEM cross-reference numbers before ordering.

How many cylinders does one set cover?
This single set contains six rings intended for one cylinder; purchase one set per cylinder required for your engine.

Are these OEM parts?
No, these are aftermarket replacement rings offered as a cost-effective alternative with OEM numbers provided for identification only.