The Challenger CLHM-RAR-20 is the direct-replacement arm restraint gear for the Challenger lift it came off of — the genuine part, same fit and same working specification as the one already on your lift. Ordering the Challenger arm restraint gear from us gets you the OEM piece that matches the lift, not an aftermarket knock-off that is close but not the same.

Specifications

• Part number: CLHM-RAR-20
• Brand: Challenger
• Type: Genuine OEM arm restraint gear

The lock ladder is the toothed steel rail bolted inside each column that the pawl climbs and catches on. Its job is simple and absolute: give the pawl a square, full-depth tooth to rest the load on at every height. When the teeth round over, chip, or the ladder loosens on its mounts, the pawl no longer has a solid shelf to sit on — and a pawl resting on a half-worn tooth is a lift resting on nothing you'd want to trust.

Restraint gear takes abuse it never shows on the surface. It absorbs the shock every time the lift settles onto the locks, and it's exposed to the same grit, water, and dropped tools as everything else at floor level. Bent teeth, a cracked weld, or a pivot rusted stiff all mean the gear can't do its job. Because it looks like solid steel, people assume it can't wear — and then it does.

Replacing your arm restraint gear

Getting the locks right means the pawl seats deep in the tooth, the spring returns it every time, and all the locks click in unison — nothing shallow, nothing sticking. It's not difficult work, but there's no partial credit on the part that catches a falling car. For that reason the complete procedure is worth reading before you start. Full step-by-step: how to replace lift arm restraint gears.

Find the right part for your lift

Landed here but not 100% sure it is your part? Grab the model and serial from the data plate and open our Challenger parts lookup for the visual breakdown — the manufacturer-style drawing with every item numbered so you can match yours exactly. Plate missing? our guide to finding your model number helps, and we identify lifts from photos every week if you would rather ask.

Signs the locking system needs attention

Inspect the ladder teeth directly with a flashlight. Square-topped teeth with a clean flat are good; teeth that are rounded, peened over, or chipped can't give the pawl a solid shelf and let it skip under load. Compare the teeth to a fresh ladder if you can — the difference between a sharp tooth and a rounded one is exactly the difference between holding and slipping.

Parts commonly replaced at the same time

Do the whole locking system while it is apart. The companion parts — springs, pawls, release cable — cost little next to the labor of opening the column, and matched hardware is what keeps both sides in sync. Give us your model and we will assemble the complete set.

Safety notes

When a lock stops working right, the whole safety design is compromised. Rounded latch teeth, weak springs, and misadjusted release cables all keep a carriage from seating fully. Service the locking system as a unit, test that both sides engage and release together, and never trust a load to a lock that drags or clicks late.

Before you order

Ordering tip: lock components are model- and vintage-specific, so read the plate before you buy. Since both columns should engage together, plan to service the lock hardware in pairs, and add the release cable if it is frayed. We will confirm the right parts for your production run.

Check your lift's serial before ordering

The most common reason a lift part comes back is not a defect — it is a revision mismatch. Manufacturers change sub-parts between production runs while keeping the same lift model name, so "it fits my lift model" is not always enough. The model plate carries the serial number that pins your lift to a specific run, and that is the number that settles which version of this part belongs on your lift.

Can't find the plate? Measure the old part — overall length, bolt-hole spacing, thread size on anything threaded — and photograph it from a couple of angles. Send that with your lift's brand and rough age and we will match it against the parts breakdowns we service from every week.

Why buy your Challenger arm restraint gear from Auto Lift Services

We install, inspect, and repair Challenger lifts every week — the CLHM-RAR-20 is a part we handle in the shop, not a random SKU we drop-ship. The phone answers if you have a question mid-install — call 800-674-9302 — and every part ships genuine, no aftermarket substitution unless you ask for it.