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tip for pulling pilot bearing #663447 11/05/05 08:22 PM
Joined: Jan 2005
Posts: 616
tomriddle Offline OP
Rock Warrior
who has the hot tip for pulling the pilot bearing out of the crank shaft? won't push out with grease pack and a whack.


94 yj 456gears, detroit locker and 30 spline axles out back, 33" bfgs
Re: tip for pulling pilot bearing [Re: tomriddle] #663448 11/05/05 08:39 PM
Joined: Oct 2003
Posts: 7,768
BigJim Offline
Web Wheeler
You put enough grease in there and get a pin that FITS and WHACK it hard enough and it WILL come out! Don't be a sissy about it WHACK IT!
Big Jim <img src="/forums/images/graemlins/pfft.gif" alt="" />


professional bovine relocation specialist
Re: tip for pulling pilot bearing [Re: BigJim] #663449 11/05/05 09:38 PM
Anonymous
Unregistered
What he said.

Re: tip for pulling pilot bearing #663450 11/06/05 01:16 AM
Joined: Feb 2004
Posts: 137
K
kc77cj7 Offline
Wheeler
The grease thing will work, but the pin needs to be only a couple thousandths smaller that the hole. Just use plenty of grease.


77 CJ-7 258 31" MTR's - now...
360, TF727, DANA 300, DANA 44's all sitting in the garage just waiting...
Re: tip for pulling pilot bearing [Re: tomriddle] #663451 11/06/05 02:31 AM
Joined: Feb 2004
Posts: 291
atavuss Offline
Mudrunner
there are puller tools available to take them out.


04 4x4 Double Cab Tacoma v6 TRD, all stock

77 Jeep CJ7, 304 v8, 33x12.50x15 bfg, 4.10 gears, 44 rear end, ford bronco low range gear mod, warn 6k winch, rubicon tested

1969 M274a5 Military Mechanical Mule

46 Bantam Civilian trailer
Re: tip for pulling pilot bearing [Re: BigJim] #663452 11/06/05 04:26 AM
Joined: Jan 2005
Posts: 616
tomriddle Offline OP
Rock Warrior
thanks guys. didn't have the right sized pin apparently, and rather than rendering myself screwed i reused the one that was in there. the clutch was brand new but i changed it anyway having bought it. hopefully the bearing is in such good shape too. my grease might have been wrong as well as the pin, slick 50 marine grease. feels thinner than standard grease. i have two new pilot bearings so i'll take em with me to look for a pin. i have a new tranny now but i'm sure the t-case and engine are close behind so i'll have more chances to get at it. nice to be able to type without gloves on!!


94 yj 456gears, detroit locker and 30 spline axles out back, 33" bfgs
Re: tip for pulling pilot bearing [Re: tomriddle] #663453 11/06/05 11:33 AM
Anonymous
Unregistered
I have used a smaller pin and put it in a rag to make a tight fit.

Re: tip for pulling pilot bearing #663454 11/06/05 01:51 PM
Joined: Oct 1999
Posts: 2,211
S
superdawg Offline
Body Damage is Cool
Any rental shop has a slide hammer with a small hook end.

I've never resorted to the grease technique.

SD

Re: tip for pulling pilot bearing #663455 11/06/05 04:31 PM
Anonymous
Unregistered
the way i did it one time was found a bolt close to the same size and then used masking tape to cover the threads and make a good tight fit. then wacked the snot out of it.
<img src="/forums/images/graemlins/patriot.gif" alt="" /> <img src="/forums/images/graemlins/cheers.gif" alt="" />

Re: tip for pulling pilot bearing [Re: tomriddle] #663456 11/06/05 07:03 PM
Joined: Oct 2003
Posts: 7,768
BigJim Offline
Web Wheeler
Two things Tom BTW Howdy!
First is the bearing.. Them things are such a pain to install and go out so suddenly I would never put an old one back in there. The clutch plate I might reinstall because I KNOW I can nurse it along.. But them bearings are so unpredictable I am scared to death of them.
Then the grease you used. I am bout to dissartate! Pardon any extra length here.
For them that are thinking "what the hell is THAT all about?" What happens with them bearings that are in a BLIND HOLE is: We fill the hole itself with grease. (it could be water or orange juice or thin oil or dog pee for all it matters!) We use grease because it will not seek it's own level quickly! So grease can be used upsidedown if needed. Ideally thin oil would be used and the crank would be stood on it's head for these proceedures. But that ain't always possible..
So we fill the void behind the bearing with grease and insert a PIN bout the same size as the hole itself. We pull the pin and squeeze some more grease into the hole till we get the pin in position where it will not enter the hole.. THEN we simply WHACK the pin with a BFH and the pin enters causing compression of the grease BEHIND the bearing. This pressure PUSHES the bearing forward... FROM the back of the hole.. And the bearing POPS out towards the BFG! Simple to do and the liquid used only matters where gravity is concerned..
EVERYONE should understand the LIQUID parts of the grease/air mixture cannot be compressed (much) so the energy of the BFG is transferred to the BACK of the bearing pushing it forward out of it's resting place.
There will be questions on the Friday test... Everyone should get a good grip on this proceedure. <img src="/forums/images/graemlins/smile.gif" alt="" />
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />


professional bovine relocation specialist
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