Mazda Rotary Club

General => General Technical => Topic started by: antnicuk on November 05, 2006, 04:44:04 PM

Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: antnicuk on November 05, 2006, 04:44:04 PM
I need to remove the pilot bearing from the end of the eccentric shaft while the engine is still in!

I have had some tips from a few experts in the field, but i\'m still struggling.  Its all broken up and the just the outer sleeve is left....

Does any one have any secret methods or tips on how to get it out.
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: RotorHeid on November 05, 2006, 05:09:14 PM
Make your own  with  m10 rawl bolt and sliding hammer.
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: antnicuk on November 05, 2006, 05:11:58 PM
i did think about trying a hilti type bolt but i think whats left in there is beyond coming out complete.  I think i will have to try and cut or grind it out but its made of some seriously hard stuff
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: RotorHeid on November 05, 2006, 05:19:33 PM
Use  heat like small gas touch until red and remove with sharp screwdriver chisher or the like!
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: antnicuk on November 05, 2006, 05:34:38 PM
will the heating the eccentric do any damage?
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: kev-yorks on November 05, 2006, 05:50:09 PM
Smallest chisel you can get hold of and go in between the shell and eccentric shaft once the shell pops inwards you\'ll be able to pull it out with long nose plyers will only take a couple of minutes to remove this way and no damage. If you can\'t get hold of a small chisel then a srewdriver with the shaft running all the way through the handle will do the same job.
Kevin
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: Glenn Butcher on November 05, 2006, 05:56:47 PM
http://www.rotaryengineillustrated.com/rebuilding-videos/replacing-pilot-bearing-seal.html (http://www.rotaryengineillustrated.com/rebuilding-videos/replacing-pilot-bearing-seal.html)
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: Glenn Butcher on November 05, 2006, 06:01:01 PM
But a dremel with a fine cutting piece, run a grove along the length of the sleve - then collapse using a small chisel/hammer.  Can be a BUGGER of a job! :)
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: Mazdarotaryparts on November 05, 2006, 06:07:17 PM
Quote from: Glenn ButcherBut a dremel with a fine cutting piece, run a grove along the length of the sleve - then collapse using a small chisel/hammer.  Can be a BUGGER of a job! :)

That\'s what I told Tony on the phone ;)  


Heat will work O/K with a welding torch and not damage the shaft.

Never had any luck Kevins way except for then having lots of dead chisels
( Sorry Kev)
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: antnicuk on November 05, 2006, 06:10:52 PM
cheers guys

i killed a couple of chisels already!!,  will try the heat if it wont cause any damage

what kind of bit in the dremel will put a groove in it?
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: kev-yorks on November 05, 2006, 06:23:37 PM
Trick is not to try to chisel the bearing shell but get the chisel to run between the eccentric shaft and bearing shell once its popped inwards then its easy to remove. I\'ve i little 5mm chisel that i\'ve shaped to the profile of the bearing that does the job no probs.
Kevin
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: clive on November 05, 2006, 06:28:38 PM
Quote from: antnicukcheers guys


what kind of bit in the dremel will put a groove in it?

One that grinds away metal :2Confused

Sorry Tony couldn\'t resist it :rollin
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: kev-yorks on November 05, 2006, 06:32:14 PM
If not a 9inch grinder with cutting blade should sort it!
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: oldone on November 05, 2006, 06:35:08 PM
Steel porting bits bud....:evillaugh :cool  destroy it and yank it out......eccentric shaft material is very hard.....:2eek  so dont be bothered about a mark or two as the outer shell of new bearing covers it !!!!!!!!:D :Typing
Should Clive and myself at it.heheheheheheheheheheheh:WaveBye
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: oldone on November 05, 2006, 06:36:09 PM
Quote from: kev-yorksIf not a 9inch grinder with cutting blade should sort it!
There you go overdoing it again......:spank  6" is more than adequote(sp)..:wiggle
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: RotorHeid on November 05, 2006, 06:36:10 PM
WoW!, quick reply from everyone, well said!!,
just finish my haggis and oat meal.
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: antnicuk on November 05, 2006, 06:37:38 PM
thanks clive  :) ,    a circular one will not cut along it,  just wondered what shape tool would
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: kev-yorks on November 05, 2006, 06:42:17 PM
Quote from: oldoneThere you go overdoing it again......:spank 6" is more than adequote(sp)..:wiggle
No when i go overkill Era i get the gas axe out!
Kevin
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: RotorHeid on November 05, 2006, 06:42:23 PM
If not move! , use a bolt(grip by vice) to screw in and tug the bush  out!
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: oldone on November 05, 2006, 06:44:37 PM
Quote from: ian duncanWoW!, quick reply from everyone, well said!!,
just finish my haggis and oat meal.
You Scottish are differant(sp).......haggis and oat meal ?,sounds like horse food....:wiggle
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: RotorHeid on November 05, 2006, 06:49:26 PM
Wooo! ,bet ootya!  me behind yer back at auld schoo met:eek
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: oldone on November 05, 2006, 06:59:22 PM
Quote from: ian duncanWooo! ,bet ootya!  me behind yer back at auld schoo met:eek
As long as you bring some haggis for me to sample bud !!!!!!!!!:Typing
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: RotorHeid on November 05, 2006, 08:03:58 PM
Okay! with barrels of whiskies
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: Timrxmotors on November 05, 2006, 08:13:09 PM
Quote from: oldoneSteel porting bits bud....:evillaugh :cool  destroy it and yank it out......eccentric shaft material is very hard.....:2eek  so dont be bothered about a mark or two as the outer shell of new bearing covers it !!!!!!!!:D :Typing
The shaft is far from hard,you can cut it with a hacksaw.The bearing case is hard,and the hole it goes into must stay perfectly unmarked,any burrs will push and deform the bearing.If you chisel it out you will be for ever trying to make the hole round again,I mean for ever! You need the proper puller,even if all the needles have gone,the puller will remove what\'s left,easily.
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: oldone on November 05, 2006, 08:22:10 PM
Quote from: Timrxmotors
Quote from: oldoneSteel porting bits bud....:evillaugh :cool  destroy it and yank it out......eccentric shaft material is very hard.....:2eek  so dont be bothered about a mark or two as the outer shell of new bearing covers it !!!!!!!!:D :Typing
The shaft is far from hard,you can cut it with a hacksaw.The bearing case is hard,and the hole it goes into must stay perfectly unmarked,any burrs will push and deform the bearing.If you chisel it out you will be for ever trying to make the hole round again,I mean for ever! You need the proper puller,even if all the needles have gone,the puller will remove what\'s left,easily.
Oh! you are such a perfect princess....:wiggle :evillaugh :guinness :Hammer :cool :2Rolleyes
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: antnicuk on November 05, 2006, 08:40:19 PM
only problem is i have no lip left at the outside end of the casing?, does the puller grip the outer lip or the inner lip?, i think i still have some lip on the inner edge

anyone have a puller i could borrow?
Title: HELP: Any tips for Removing Pilot Bearing from the Eccentric shaft
Post by: Grizzly on November 05, 2006, 11:56:41 PM
Its easy, Not to sound Rough but i Distroyed mine with a Screw driver and a Hammer.

I tryed all sorts at first, things like getting a few Washers that just fit inside the bearing then put a Bolt through them and a Slide hammer on the end, that worked ok to a point then the Washers started to go out of Shape and it just slipped off, So i lost My Rag and hit it with a Hammer :)