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Ridgid R4512 drive belt/pulley issue

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Forum topic by Boomerriz posted 05-11-2015 02:03 AM 1052 views 0 times favorited 9 replies Add to Favorites Watch
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Boomerriz

5 posts in 1055 days


05-11-2015 02:03 AM

I’ve had a R4512 for about 2 years now. This year it’s started throwing the belt. After about 30 minutes of use the belt slips and I need to take the back off and put it back on. This has happened about 3 times so far.

When doing this I’ve noticed that the pulley attached to the motor is free to move in and out. There’s a hex set screw attached to the pulley, but it won’t tighten any more than it already is.

I saw an a different topic how to tighten the belt so I’m going to try that tomorrow, but before I do I was wondering if anyone knew if the motor pulley is supposed to float like it does of it it’s supposed to be locked in place?


9 replies so far

View TheFridge's profile

TheFridge

7087 posts in 1149 days


#1 posted 05-11-2015 02:17 AM

Nope. Lock it in place. Need to be in line with the arbor pulley.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

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Boomerriz

5 posts in 1055 days


#2 posted 05-11-2015 12:53 PM

Thank you so much! Really appreciate it. I’ll look to hit it with some JB Weld since the set screw seems to be locked up in place and not holding the pulley. I’m thinking that will do the trick.

View MrUnix's profile

MrUnix

5326 posts in 1862 days


#3 posted 05-11-2015 01:23 PM

Thank you so much! Really appreciate it. I ll look to hit it with some JB Weld since the set screw seems to be locked up in place and not holding the pulley. I m thinking that will do the trick.

- Boomerriz

Really bad idea. Fix it right. Yank the pulley and see what is going on with it.

Cheers
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

View SirIrb's profile

SirIrb

1239 posts in 894 days


#4 posted 05-11-2015 01:49 PM

JB weld is great…when you are sure you made the correct fix with it. Im with Unix, this isnt a cracked motor block (Ex bro in law fixed his chevy that way with JB weld). Find the problem and fix it correctly.

-- Don't blame me, I voted for no one.

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johnstoneb

2447 posts in 1836 days


#5 posted 05-11-2015 01:52 PM

Take the set screw out there may be another setscrew below that one. Some of the sears saws had double set screws. The purpose is to keep the lower one locked in placed but they don’t always work.

-- Bruce, Boise, ID

View taoist's profile

taoist

124 posts in 2155 days


#6 posted 05-11-2015 01:59 PM

If the motor shaft is moving in and out, could be the bearings are shot and need to be replaced. If it is just the pulley then pull it apart and figure out why.

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Boomerriz

5 posts in 1055 days


#7 posted 05-11-2015 02:43 PM

I originally loosened the set screw a few turns and the pulley wouldn’t pop off, but I didn’t consider that there could be a second set screw under. I’ll take it all the way out and see if I can get the pulley off and diagnose from there. Manual says there’s 1, but wouldn’t be the first time a manual was incorrect.

It’s not the motor shaft, the shaft is solid. It’s just that the pulley is loose on the shaft and moves out of alignment after some use, which causes the belt to slip after once the pulley goes out of alignment.

The set screw is an M5×8mm, and I’ve tightened it to the point where the Allen key bends pretty heavily so I’m pretty sure I can’t tighten more than it already is.

Thanks all for the advice.

View PaulHWood's profile

PaulHWood

378 posts in 1916 days


#8 posted 05-11-2015 03:46 PM

Had the same issue, couldn’t really tell what size wrench to use on the pulley set screw, but as it turned out, the set screw was not right from the factory. Had to take the whole saw to the repair place even though I thought it was just the pulley assembly.

They had it for about a week and replaced the motor also. Has worked fine since. Not sure if the pulley slipping put a strain on the motor or the repair shop wanted to get paid for replacing a motor.

Did not cost me anything (LSA)

-- -Paul, South Carolina Structural Engineer by trade, Crappy Woodworker by choice

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knotscott

7634 posts in 3039 days


#9 posted 05-11-2015 04:12 PM



Take the set screw out there may be another setscrew below that one. Some of the sears saws had double set screws. The purpose is to keep the lower one locked in placed but they don t always work.

- johnstoneb

That double set screw scenario has confounded many of us….

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

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