The kinds of part you will find
- Original (OEM)
- Made for and sold by the tractor’s manufacturer, usually through its dealers. Often the best fit, sometimes the most expensive.
- New old stock (NOS)
- Original parts made years ago and never used. Correct for a restoration, but supply is fixed and prices rise as it runs out.
- Aftermarket
- New parts made by other companies to fit. Quality and accuracy vary from excellent to poor.
- Reproduction
- Made to copy the original’s appearance as well as its fit, for restorers. Often small batches that sell out.
- Used and salvage
- Removed from other machines. Correct original parts, in whatever condition they have survived.
- Rebuilt
- Used assemblies restored to working order, typically gauges, pumps and other mechanical units.
Superseded part numbers
Manufacturers replace part numbers over time. A number may be superseded by a newer one, sometimes several times. The latest part usually fits and works, but it may not look like the original, which matters for a restoration. Our part pages show the supersession chain where we have found it.
How we label what we know
Every fact on a PorkForge part page carries a status, so you can judge how far to rely on it:
- Verified seen on a manufacturer or dealer source.
- Reported from one secondary source, such as an aftermarket listing or an owners’ forum.
- Inferred worked out from other facts and not stated by any source.
- Unknown not yet established.
We also record whether the original is still sold:
- Available the manufacturer still sells it.
- No longer available discontinued or obsolete.
- Assembly only only sold as part of a larger assembly.
- Dealer only not sold to the public.
- Back-ordered listed, but on long backorder.
Choosing
- Show restorations: original, NOS or a good reproduction, matched to the serial number range.
- Working tractors: whatever fits and lasts, including superseded and aftermarket parts.
- Anything safety-related (steering, brakes, hitches, PTO guards): original or a reputable new part only, never a cosmetic copy.