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North West Datsun Enthusiasts Forum : Datsun : 510
Topic: Pulling throw out bushing
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defdes
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bullet Topic: Pulling throw out bushing
    Posted: 19 April 2006 at 7:25pm
I am ready for final assembly of my L16, but the 3 arm bearing puller I have is way too big to pull such a small dia. item. Are there any home made tricks I should know about for easy extraction?
'72 LZ22 510
'71 L16 510 Vintage CS Racer
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Hainz
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bullet Posted: 20 April 2006 at 9:41am
use a puller/chinese hammer
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Yellowcar
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bullet Posted: 20 April 2006 at 11:47am

If you are really careful

you can cut the bearing with a hacksaw blade until you are almost through then tap it with a chisel until it breaks the rest of the way and then pull it out it takes a long time though.

OR

Buy a pilot bearing puller (harbor freight has cheap ones)

OR (what I have found works best)

buy a small slide hammer set and use the small two jaw adaptor

I have this one http://buy1.snapon.com/catalog/item.asp?P65=&tool=all&item_ID=9956&group_ID=1168&store=snapon-store&dir=catalog (but again harbor freight has cheap ones).

and lastly I have heard (but never tried) that you can fill the cavity with grease and slide a tight fitting punch into the bearing and hit it with a hammer the grease will force the bearing out...(I am a little skeptical about this one though)

 
'72 510 LZ2.5
'06 VW Jetta
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defdes
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bullet Posted: 20 April 2006 at 11:54am
I tried the last method...didn't work. My local KRAGEN has a tool rental policy, I am going to go borrow theirs.
'72 LZ22 510
'71 L16 510 Vintage CS Racer
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datsunaholic
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bullet Posted: 20 April 2006 at 11:57am
The last method usually results in either pushing the bushing in too far or getting grease all over the place. You have to have a nearly perfect fit for it to work.
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74wagon710
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bullet Posted: 20 April 2006 at 12:54pm
I have used the grease method many times and it has worked without a huge mess 90% of the time.  The throwout bearing is what he posted about but it appears it was the pilot bearing he meant to ask about. 
74 Datsun 710 wagon, all original now, near perfect shape, project vehicle now.

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Yellowcar
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bullet Posted: 21 April 2006 at 12:30pm

The problem I have had with the pilot bearing puller is a fair amount of the time the arms are not strong enough (I have a good quality snap on tool) and the arms simply cave in before the bushing moves.

I have used two screwdrivers between the arms and the center shaft to help hold the arms out but found the slide hammer works better

'72 510 LZ2.5
'06 VW Jetta
'98 mercedes C280 sport
'01 ZX9R
'02 ZX6R

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defdes
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bullet Posted: 21 April 2006 at 8:46pm
I borrowed one from KRAGEN, worked like a charm. Spanned them with a screw driver a la Yellowcar.
'72 LZ22 510
'71 L16 510 Vintage CS Racer
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harshman_b
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bullet Posted: 22 April 2006 at 2:09am
The grease method works for pilot bearings but bushings seem to fit a little tighter and have less collar for the grease to push back on...in my experience. However instead of using a tight fitting punch, I have always used a medium length bolt slight smaller in diameter and then wrapping in it either electrical or duct tape. Works great to create a nice tight fit. Always be sure to pack in entire area, on inside, with grease all the way up to near flush with the outside. The more grease thats in there the more force will be exerted outward on the pilot bearing.
`72 521 on `80 720 4x4 frame with L20b, Weber, Header, 2" exhaust, 4.11 gears and 31" tires.
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