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Pilot/spigot bearing puller

Posted: 22 Oct 2020, 11:02
by steveo9007
I am shortly going to replace my gearbox and fit new clutch. I’m wanting to change the pilot/spigot bearing at the same time whilst gearbox is out and clutch is being changed. Any recommendations for a decent puller to get to do this job. I have seen inner pilot bearing pullers but some reviews are showing not very good results. Help appreciated thanks.

Re: Pilot/spigot bearing puller

Posted: 22 Oct 2020, 11:23
by davidoft1
Fill the void with grease and get as tight a fitting piece of tube to the bearing , put it in the hole, give it a whack, the bearing will be pushed out due to hydraulic pressure

Re: Pilot/spigot bearing puller

Posted: 22 Oct 2020, 11:26
by steveo9007
I have heard of this method and seen a video where someone used bread. Do this actually work ??

Re: Pilot/spigot bearing puller

Posted: 22 Oct 2020, 11:42
by davidoft1
steveo9007 wrote: 22 Oct 2020, 11:26 I have heard of this method and seen a video where someone used bread. Do this actually work ??

never tried it with bread but grease works 100%

Re: Pilot/spigot bearing puller

Posted: 22 Oct 2020, 12:28
by ZsZ
fresh white bread works too. Done it that way before. But grease is better although it is more messy.
The main thing is the rod you use to hammer have to be a tight fit into the bearing.

Re: Pilot/spigot bearing puller

Posted: 22 Oct 2020, 15:56
by Mr Bean
ZsZ wrote: 22 Oct 2020, 12:28 fresh white bread works too. Done it that way before. But grease is better although it is more messy.
The main thing is the rod you use to hammer have to be a tight fit into the bearing.
Yes glad you mentioned the word rod as the tube mentioned originally earlier was possibly a bit misleading. A longish rod will help with visual alignment and ensure you have plenty upon which to grip if it should it jam in. As the rod is required to seal hydraulically when it is thumped into the bearing  I would have used the word snug. I am surprised some enterprising wag hasn't come up with an "O" ring or lip seal and sachet of grease for this job. :wink:  

Re: Pilot/spigot bearing puller

Posted: 22 Oct 2020, 19:37
by colinthefox
I use an 8mm Rawlbolt and a block of wood with a hole in it.

Re: Pilot/spigot bearing puller

Posted: 22 Oct 2020, 19:40
by Aidan
if you do the grease thing please video it as I for one want to see this actually done that way
I have a slide hammer and internal bearing puller and even with that it takes a fair pull (usually a couple of tugs) to get them out

Re: Pilot/spigot bearing puller

Posted: 22 Oct 2020, 19:44
by steveo9007
I have got a blind inner bearing puller coming my way, so will be using that but if it’s like toffee and breaks then I will have me loaf of bread and grease on standby 👊

Re: Pilot/spigot bearing puller

Posted: 22 Oct 2020, 19:54
by davidoft1
steveo9007 wrote: 22 Oct 2020, 19:44 I have got a blind inner bearing puller coming my way, so will be using that but if it’s like toffee and breaks then I will have me loaf of bread and grease on standby 👊


Grease is easier :D

Re: Pilot/spigot bearing puller

Posted: 22 Oct 2020, 21:22
by pkrboo
steveo9007 wrote:I have heard of this method and seen a video where someone used bread. Do this actually work ??
I've used bread to get a blind bearing out and it worked a treat.

Sent from my Pixel 4 using Tapatalk


Re: Pilot/spigot bearing puller

Posted: 22 Oct 2020, 21:30
by Mr Bean
davidoft1 wrote: 22 Oct 2020, 19:54
steveo9007 wrote: 22 Oct 2020, 19:44 I have got a blind inner bearing puller coming my way, so will be using that but if it’s like toffee and breaks then I will have me loaf of bread and grease on standby 👊


Grease is easier :D
Confession: I was thinking about plain pilot bearing removal using "piston", grease and hammer hydraulic technique in the days of cross-ply tires and black and white tele :oops: . I am less confident with needle roller bearing extraction using this method but it looks like a puller is on the way anyway.
:ok
 

Re: Pilot/spigot bearing puller

Posted: 23 Oct 2020, 12:59
by Mr Bean
steveo9007 wrote: 22 Oct 2020, 11:26 I have heard of this method and seen a video where someone used bread. Do this actually work ??
Got an Excel file doing the calculations but cant work out how to upload it but this sketch should explain it ok. The inverse square law is very helpful in this situation as the cross sectional area increases with the square of the radius so the bit round the edge gives plenty of bangs per buck so to speak. Tricky to seal in the case of a needle roller but a dream for solid bearings - even oilite bushes especially with grease.
See loosely connected aside story after image:Image

Some time ago My mate across the road brought home a massive cherry picker lorry with a damaged side jack piston for the engineer to come and replace. After several hours of poking about with hooks and wedges the engineer decided it had to join a three week queue at the workshop as the piston rod was hopelessly jammed into the cylinder with nothing exposed to grip it by . I wandered over (as usual) to see what was up and after a bit of pondering, asked my mate to start up the engine and attempt to extend the leg. I placed a bucket under the cylinder and when he operated the lever the piston gently slid out falling into the bucket together with a couple of litres of hydraulic fluid. The engineer didn't know whether to cry or laugh as he had ether over thought the job or was short of work :? .

Re: Pilot/spigot bearing puller

Posted: 23 Oct 2020, 19:29
by tobydog
pkrboo wrote: 22 Oct 2020, 21:22
steveo9007 wrote: I have heard of this method and seen a video where someone used bread. Do this actually work ??
I've used bread to get a blind bearing out and it worked a treat.

Sent from my Pixel 4 using Tapatalk

White or wholemeal? 8)

Re: Pilot/spigot bearing puller

Posted: 23 Oct 2020, 19:30
by steveo9007
Has to be white, can’t stand whole meal 😆