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Author Topic:   tightning yoke on 9"
wingnut
Dirt Maniac

Total posts: 134
posted April 05, 2005 09:06 PM  
I have a gear that I purchased used and I need to change the yoke on it. not sure if it has a crush collar or spacer. since it has been torqued originally , how tight do I want to tighten it without without over doing it?
also does anyone sell a kit or instructions on learning to set up gears .
Thank you

jlfastride
Dirt Maniac

Total posts: 135
posted April 05, 2005 09:31 PM  
this is touch and go what i would do if the gear is set up right originally. i would change the yoke tighten the nut until i feel slight resistance in the turning of it. making sure that there is no play left, fore and aft in the pinion and then put a small tack weld on the nut and thread. make sure you run the car in gear , jacked up at least 10 mins 2 times before hitting the track. just my 2 cents. jl
notice the first sent.

outlawstock17
Dirt Forum Champ
Total posts: 1363
posted April 06, 2005 06:07 AM  
use a new nut or some threadlocker on the old one. snug it down and add a 1/4 turn. DO NOT WELD IT....if you do, you'll hate yourself later...

Istock66
unregistered Total posts: 1363
posted April 06, 2005 06:40 AM           send a private message to outlawstock17   Edit/Delete Message   Reply w/QuoteBBBBBB
I just rattle mine on and off all the time with my impact gun.

It takes a 4 ft pipe for leverage to crush the collar, so your impact with the yoke held in your hand sure isnt going to crush it anymore.

Ive never used any locktite either or a new nut ever, is that nut supposed to have a problem coming loose?

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted April 06, 2005 07:40 AM  
I agree with istock66. If youput it on and dont let it hammer wiht the impact or put it on by hand with a rachet I doubt you are going to get enough force to mess with the crush sleeve. If you have a solid spacer then it doesnt matter though. just tighten it down and your done. I dont think it would hurt ot put a little loctite on it but I cant say that I have ever had one come loose either.

hiredgun
Dirt Forum Racer

Total posts: 78
posted April 06, 2005 02:05 PM  
I have put some yellow 3M weathersrip glue
on mine .

sdracer12
Dirt Maniac

Total posts: 180
posted April 06, 2005 07:40 PM  
I've changed a couple of yokes, and haven't had any problems, yet. A new nut and a little blue locktite is good insurance.

Anybody have trouble with the yoke leaking oil past the nut (not out of the seal) ? I'm thinking my splines or yoke were getting a little wore, and some silicone on the splines seemed to fix it.

outlawstock17
Dirt Forum Champ
Total posts: 1363
posted April 07, 2005 05:26 AM  
sdracer12...yes, you must be using synthetic gear oil. everyone i've assembled and used synthetic gear oil in, even with new parts, leaks around the nut. not enough to worry about, but they do seep a little.

synthetic oils seem to find leaks...

ctfarm
Dirt Freak

Total posts: 206
posted April 07, 2005 05:53 AM  
Put a little silicone on the nut flange and between the washer and yoke,this will stop the leak.


sdracer12
Dirt Maniac

Total posts: 180
posted April 07, 2005 09:47 PM  
Thanks guys! lol

boas51
Dirt Maniac

Total posts: 190
posted April 08, 2005 06:17 AM  
does anybody have the actual torque specs for torquing the pinion nut on a 9"? none of the literature that comes with the gears gives this spec! seems pretty important to me. or are you just spose to tighten until you take the play out of the pinion? this is what i have been doing, but i know there must be a spec.
my cheap 1/2" air impact will not crush a new crush sleeve, so i will guess over 200 ft/lbs.

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted April 08, 2005 07:47 AM  
I dont know that there is a set torque. with a crush sleeve you have to tighten it until you get the correct preload on the bearings no matter what the torque on the nut is. I do believe it is well above simple hand tightening so there is no chance of crushing the sleeve furthur with only a standrad rachet. If you have a good heavy duty impact i wouldnt let it hammer on it either just runit down snug and stop.

Istock66
unregistered Total posts: 2007
posted April 08, 2005 11:17 AM           send a private message to dirtbuster   Edit/Delete Message   Reply w/QuoteBBBBBB
Ive got the top of the line craftsman impact and 150 psi and it wont crush the collar.

It took a 6 ft bar for a 275 man to crush the last one I needed crushed.

Its supposed to take about 8lbs of force to rotate the yoke I think, havent done one in a long time or looked it up. A fish scale can be used to pull on it and set the preload.

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted April 08, 2005 12:04 PM  
I've always done it how Istock66 does it, with an impact. Just zip it off there and then tighten the nut till the yolk has some resistance, then back it off a little... I have never crushed a collar with my 18V Snap On Impact, but I can overtighten the gear.

boas51
Dirt Maniac

Total posts: 190
posted April 12, 2005 07:02 AM  
just got done setting up a set. it took a 3/4" ratchet to crush the collar. no 4ft or 6 ft snipe, but more than my 1/2" impact will do.
i also used a non locking nut and lubed it while crushing the collar, which would have made it easier.
also found a number for the preload on the bearings, it is spose to take something like 12-24 in/lbs.(off the top of my head) to turn the pinion with preload.

tcmod
Dirt Full Roller

Total posts: 56
posted April 13, 2005 07:53 PM  
There is no torque spec for the pinion nut, it is checked by rolling resistance of turning the pinion, 12 to 30 INCH pounds of rotational force, this measures the preload on the bearings, to much and they will create to much heat and that creates fire, my Snap On 1/2 impact has crushed many collars but the last few blows are touchy and you can go over real easy, if I do that I take the collar out and start over with a new one, long 1/2 breaker bar works and gives you good work out, tcmod.

Istock66
unregistered Total posts: 56
posted April 13, 2005 07:58 PM           send a private message to tcmod   Edit/Delete Message   Reply w/QuoteBBBBBB
12-30 lbs of rotational force!!

Good luck with that, 15 lbs.. over heated brgs on the first couple I did.

8-10 is working good even up to 650 gears for me.

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted April 14, 2005 07:20 AM  
keep in mind new bearings are preloaded to a different spec than used bearings. I dont know off hand exactly what they are but seems like it was in the 10 inch pound range.

edit:
Just found some specs 16-17inch pounds for new pinion beargins and 10inch pounds for used bearings. Also I read somewhere where it will take something like 175#ft of torque to reach the proper preload with a new crush sleeve. So if you just run the nut on and off by hand with a rachet your not going to crush the collar anymore which wont change the preload. You just need to make sure you snug it up so that you dont leave the bearings loose.
http://www.richmondgear.com/01instructions.html

[This message has been edited by dirtbuster (edited April 14, 2005).]

tcmod
Dirt Full Roller

Total posts: 56
posted April 14, 2005 08:07 PM  
I have never had a problem with any of the many gears I set up, so maybe I do have good luck, when I am setting up race only gears I generally run them on the low side, but yes I have seen specs in shop manuals as high as 30 inch pounds with new bearings, so good luck, tcmod.

tcmod
Dirt Full Roller

Total posts: 56
posted April 14, 2005 08:09 PM  
also, if 15 inch pounds overheated pinion bearings on your first couple, something else was wrong, tcmod.

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