Can't get the v belts on my new Jet 8 in HH jointer.

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Forum topic by dmisita posted 06-05-2015 08:15 PM 1049 views 0 times favorited 6 replies Add to Favorites Watch
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23 posts in 1438 days

06-05-2015 08:15 PM

Topic tags/keywords: question jointer belt trick set up

I was wondering if anyone knows a trick for getting the drive belts onto a jointer? The ones that came with my jointer seem a bit too tight for it.

The instruction manual recommends loosening the mount screws for the motor, but this doesn’t give enough play to fix the problem. Then, when I took them off completely, the motor is suspended too high in the air to get the screws back into place.

I’ve also tried loosening the big bolts that hold the plate which the motor is bolted through, but so far I can only get one of these to turn. The left sided bolts seem to be dropped down compared to the right, and I think if I can raise this side it will solve my problem, possibly.

Any ideas? Either how to loosen the motor mount plate bolts, or how to stretch the belts over the motor.



6 replies so far

View pintodeluxe's profile


5624 posts in 2782 days

#1 posted 06-05-2015 08:28 PM

Would a clamp flipped to create a spreader fit inside the jointer? If not you could stretch the belt overnight in that fashion and try again.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

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Fred Hargis

4955 posts in 2462 days

#2 posted 06-05-2015 08:44 PM

If by “mount screws” you refer to the ones holding the motor, I think it was the wrong ones. Look at the plate the motor sits on. One side (the left side I think) is slotted to allow it to pivot up/down and tension the belts. So loosen the plate mounts, position the belts, and then tighten the plate to the tightness you want. At least that’s how mine works (it’s about 14 years old).

PS: it is a royal PITA to reach some of those bolts.

-- Our village hasn't lost it's idiot, he was elected to congress.

View dmisita's profile


23 posts in 1438 days

#3 posted 06-06-2015 03:39 AM

OK! I fixed it! Fred is definitely correct that the left side is slotted to allow the motor mount to rise and fall and tension the belts.

So, there were several issues at work here:

1: Bad instructions. They tell you to loosen the motor mount screws, not the belt tensioning screws. This doesn’t work because you cannot lift the motor more than 1/8 inch.

2: Difficult to reach/turn bolts. I had to contort myself to reach them. The bolts holding the tensioning side of the motor platform were easier to reach but very difficult to turn. A spritz of silicone spray helped, some.

3: Heavy motor. I couldn’t life the platform with the motor in place and then tighten it back down, while trying to get the belts over the motor, and balancing a bunch of tools, and ….....

The solution:

I unbolted the motor from the platform and took it off. This made it 1000x easier to lift the platform all the way up, and lock it into place. Then, I replaced the motor, and bolted it back into place. (And, yes, I was forced to practically grow a third elbow to do this.) Then, by taking a board and levering the whole thing up 1/16th of an inch, I was able to get the belts to slip over the motor spindle. This wasn’t easy, but it worked. And, the tension meets the half-inch deflection recommended by the manufacturer.

So, to sum up. It was a HUUUUUUGE PITA, but I did it.

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Fred Hargis

4955 posts in 2462 days

#4 posted 06-06-2015 12:41 PM

HA HA, I told you so (LOL). Glad you got things squared away, which reminds me: I’ve been meaning to put new belts on mine, I just ordered a set. But, that manual may have been written for the earlier models, they changed the design and didn’t update the book…...wouldn’t be the first time.

-- Our village hasn't lost it's idiot, he was elected to congress.

View helluvawreck's profile


30765 posts in 2835 days

#5 posted 06-06-2015 01:02 PM

I have never seen any manual that didn’t have mistakes in it. Just making their manuals accurate could always save a machinery company a lot of money, so why not make a good manual. How would it save them money? It would be good for their sales, make happier customers, and would decrease the work load on their customer service departments and trouble shooting departments. They act like they do not understand that a bad manual costs a lot of wasted time to a their customers in addition to themselves.

helluvawreck aka Charles

-- helluvawreck aka Charles,

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Fred Hargis

4955 posts in 2462 days

#6 posted 06-08-2015 05:51 PM

Dave, just so you know, I got my new belts today and reminded myself of just how big a pain this is. I did 2 things that really helped. First I set the planer stand up on 4×4 blocks, which allowed me to r4each underneath to get to the mounting and adjustment bolts. Second, my new belts were too tight with the most loose adjustment I could make in the mount. I made a 3/4” plywood spacer to put under the motor, that give me plenty of slack to get everything together and adjusted to a tension I liked. I know you done with yours, but if you ever have to do it again.

-- Our village hasn't lost it's idiot, he was elected to congress.

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