What's In The Box And What It Fits
This kit rebuilds the steering knuckle pivot on the Meritor FA-139 front axle — kingpins, bushings, seals, thrust bearings, and the hardware to put it back together. It's built for the 12,000# rated axle that International/Navistar hung under conventional trucks from 1975 through 1981.
If you're pulling a worn kingpin kit off one of these trucks and the axle tag reads FA-139, or the old part number matches K139I, 460.512C, 491611C91, or 472094C91, you're in the right spot. Axle tag is your go-to reference here — it's riveted to the axle beam and won't lie to you like a parts book sometimes does.
Why All These Numbers Cross To The Same Kit
Meritor built the axle, International/Navistar bought it and slapped their own part numbers on the kit for their parts counters, and the aftermarket picked it up as FAK4498. Same axle, same kingpin bore, same bushing ID — different labels stuck on by whoever was selling it. That's why R200055, 460.512C, K139I, 491611C91, 472094C91, and FAK4498 all land on the same kit.
Where guys get burned is not checking bushing ID and kingpin diameter before ordering — Meritor made more than one FA-139 variation over the years, and a kit that's close but not exact will bind up in the knuckle or leak at the seal within a few thousand miles. Pull the old kingpins and measure, or better yet, read the number stamped on the kit box or knuckle if it's still legible.
Ordering From PartStop
We keep this one in stock in Tacoma — walk in with the old kit or the axle tag and we'll match it up right at the counter. If you're not local, we ship nationwide and can usually get it out same day if you order before early afternoon.
Comes with the standard 6+ month warranty. Confirm fitment by VIN or the number stamped on your old kingpin kit before you buy — a $199 kit is cheap insurance against a $199 kit that doesn't fit.
R200055 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to R200055. Use them to identify the part — then confirm the exact fit by VIN or the number stamped on your old unit before you order. An interchange is a starting point, not a fitment guarantee.
| Brand / Line | Cross-Reference Numbers |
|---|---|
| Cross-Reference | 460.512C, K139I, 491611C91, 472094C91, FAK4498, 4333-FAK4498 |
Frequently asked questions
Does R200055 fit my 1978 International with the FA-139 axle?
Likely yes, but check the axle tag riveted to the beam — it should say FA-139. If the old kingpin kit or bushing has a number matching K139I or 460.512C, that confirms it. If the tag's gone, give us the VIN and we can look it up.
Is R200055 the same as the FAK4498 aftermarket kit?
Same kingpin kit, different label. FAK4498 is the aftermarket part number for the identical kit that Meritor built for the FA-139 axle and International cataloged under 460.512C and K139I. Bushing ID, kingpin diameter, and seal sizes are the same.
My axle has two different bushing sizes stamped on the old parts — which kit do I need?
That means your FA-139 might be a different vintage or someone installed a mismatched bushing before. Don't guess — measure the kingpin OD and bushing ID off the old parts, or bring them to the counter, and we'll match the right kit instead of ordering twice.
Not sure it fits? We check before you pay.
Run your VIN and we’ll match parts to your exact truck, or call the counter — a person who knows trucks verifies fitment by OEM number before the order ships. No wrong-box returns.
More cross-reference guides
Need the part, not just the reading?
Every part below is a Premium Quality aftermarket Direct Replacement with published OEM cross-reference numbers, a 6+ month warranty and same-business-day shipping from Tacoma, WA. Not sure it fits? Run your VIN — or call and a person who knows trucks will verify fitment before you pay.