What You're Looking At
This is a right-hand rotation S-cam, meaning the cam profile is cut to work on the passenger side of the axle - put it on the wrong side and your brakes will either drag or not apply right. 28 spline is the common count on these Meritor-pattern 16.5" brake setups, so double-check that against your old shaft before you order.
Length matters here too. 21.06" is a specific dimension - camshafts come in a range of lengths depending on axle spacing and slack adjuster mounting, so a shaft that's an inch off either way won't line up in the spider or reach the adjuster properly.
This isn't a universal one-size shaft. It's built to a Meritor spec that a bunch of trailer and axle manufacturers used, which is exactly why you see so many cross numbers on one part.
Why All These Numbers Cross to the Same Shaft
R607147, the 2210-H-7028 and 2210-U-8159 numbers, CS41113/41113, and 17-724 all show up because Meritor-spec S-cams got built and packaged under different brand names over the years - axle manufacturers, trailer OEMs, and aftermarket houses all sold the same basic shaft with their own part number stamped on the box. Spline count, cam length, and rotation match up across these, which is why they interchange.
Where guys get burned is assuming any 28-spline shaft is interchangeable. Two shafts can share spline count and still differ in overall length, head diameter, or where the cam lobe sits relative to the spline - and that throws off your shoe engagement even if it physically bolts in.
Surest way to confirm: pull the old camshaft and check the number stamped on it, or go by your trailer's axle tag / VIN and match to 16.5" x 28 spline RH spec. If the numbers match what's on this page, you're in business. If you're not sure, call us with what's stamped on the old shaft and we'll match it up before you spend the money.
Ordering From PartStop
We're in Tacoma and keep this stuff on the shelf - not backordered from three states away. Local fleets can get same-day pickup, and we ship nationwide if you're not close enough to walk in.
Comes with our standard 6+ month warranty. It's an aftermarket part, not a Meritor-branded piece, so don't expect a Meritor box - but the spec and fitment cross the way we've laid out above.
If you're doing a full brake job, grab the matching bushings, seals, and anchor pins while you're at it - camshaft wear usually means the bore's worn too, and putting a new shaft in a sloppy bore just gets you back here in six months.
E5511 Cross-Reference & Interchange Numbers
These manufacturer and aftermarket numbers commonly cross-reference to E5511. 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 |
|---|---|
| OE/Cross-Ref | R607147, 2210-H-7028, 2210-U-8159, CS41113, 41113, 17-724, 122.282110.04 |
Frequently asked questions
Does R607147 fit my trailer?
If your trailer's axle spec calls for a 16.5" RH S-cam, 28 spline, 21.06" length, then yes, R607147 crosses to this same part. Confirm by checking the number stamped on your old camshaft or your axle tag - don't just go by trailer make/model since axle suppliers get swapped over a trailer's production run.
Is this the same as the CS41113?
Same spec - RH rotation, 28 spline, 21.06" length for 16.5" brakes - just a different brand's part number on the box. CS41113 and the plain 41113 number both cross to this E5511. Match the physical dimensions on your old shaft to be sure before ordering.
How do I know if I need RH or LH?
Stand behind the trailer looking forward - passenger side is RH, driver side is LH, and the cam lobe orientation is machined differently for each so they're not interchangeable side to side. Pulling the old shaft and checking rotation, or comparing to the working shaft on the other side, is the surest way to confirm before you order.
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.