LockJack Sport Replacement Parts

LockJack Sport replacement parts let you swap out worn components on the LockJack Sport, a mechanical friction device used for moving rope (MRS) tree climbing. Only use the maker's own parts for the specific component that needs replacing.

What wears on a mechanical device

A mechanical friction device works hard. Rope runs through it all day, grit gets in, and the attachment points rub against connectors. Some components are designed to be replaced when they wear, while others mean the device itself should be retired.

Check your manual to see which parts are user-replaceable. If a part is not listed as replaceable, or you see cracks, deformation, or sharp edges in the body, retire the device.

Keep the device clean. Rinse grit out with fresh water when it gets dirty, let it dry fully, and follow the maker's guidance on lubrication. A device that sticks or drags is telling you something.

Ordering and fitting

Confirm which part you need and that it matches your device version before ordering. Compare other MRS climbing devices if your unit is due for retirement.

Install parts exactly as the instructions show, check that everything moves freely and locks as designed, and test the system low and slow before climbing. Life-support gear must meet the applicable standard, follow ANSI Z133 and the manufacturer's instructions, and be inspected before every climb. Get trained before you rely on it.

When in doubt about a part or a symptom, contact the manufacturer before climbing on it again. Write down when you replaced parts in your gear log so you can track the device's history.