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My Posi-lock nut won't stay tight.

The Posi-lock nut system is designed to be light and strong. It keeps your axle from moving side to side in your carrier. There are two reasons why the nut comes loose.

In example #1 Below we see one of our common posi lock nuts where the inner sleeve is extended to far. There are not enough threads inside the nut to grab onto. We have several models of posi lock nut including one model that has a very long inner sleeve. On this model it will stick out about 1’ and that is ok. In general there should be at least 3/8” to 1/2” of threads inside the sleeve. This will give the posi lock nut enough threads to grab and hold the inner sleeve tight. Remember, it is not how much thread is sticking out of the nut as much as it is how much thread is inside the the nut!

The second reason your Posi-lock may be coming loose is that the big nut was over tightened and has collapsed. Remember, using a pipe wrench to tighten the big nut down can cause the nut to collapse and or warp its shape. Get the big nut snug then tighten the allen bolt. On rare occasions you may need to add a washer or spacer to shorten inner sleeve travel.

Solution: Tighten the big Posi-Lock nut until it's snug (not tight). Tighten the allen bolt. ( 17 lbs/ft) Ride quad and re-check the Posi-Lock nut. Re-tighten using a small amount of lock tight on the allen bolt. Check the threaded inner sleeve to make sure it's not out to far. You should be good to go! Thanks to our customers for the pictures!

My Posi Lock nut still comes loose. Now what?
There have been a few cases where the nut appears to come loose despite the fact you did everything correctly on the list above. First, we have to determine that the Posi Lock nut is actually at fault. You can test the nut by taking a felt tip pen and marking the edge of the nut (see picture). Ride your quad for a while and check your index marks. If they are still lined up then it's not the Posi-Lock that is coming loose, but some other component. Bearings are the usual suspect. If the index marks have shifted, then the Posi-Lock nut is coming loose. You can apply some Loctite to the inner sleeve of the nut. Use the blue medium strength Loctite and apply a couple of drops to the threads. Don't over do it with the Loctite ( more is not better). You may need to get the nut off someday! Give the Loctite about 5 minutes to dry so you get full effectiveness. Most people have the red Loctite. If you use the red, apply only one drop!

Some of you have noticed that if you grab the nut, you can rotate the whole assembly by hand! Don't panic this is normal. Remember the Posi-Lock nut system keeps your axle from moving side to side in the bearing carrier.

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