PTO drive shaft

[renago]

Hi guys , I need some help !
I am trying to install a PTO winch on my HZJ 78 , but have some difficulties with the drive shaft .
in detail on the center leg I have 2 blocks that fix the shaft to the chassis that must be replaced ,Part 37212, because worn out badly .
But I am unable to tear apart the center leg of the shaft !
I am talking about the part 37601.
does any one have any experience in this ???

thanks Renago

 

[peteinjp]

Renago,

37604 is the center shaft correct? In my case none of the bearings or seals are available from Toyota for the pillow blocks. I bought sealed bearings for the supplier and will use them when need be however I chose to leave the bearings in for the time being because they weren't that bad in my case.

Is it just that your shaft is frozen into the yoke? Have you disassembled the universal joints? I think you must to do that in order to press the shaft from the yoke especially if it's rusted. In this case a hot plumbers torch can be of great use to help free any stuck parts.

Peter

 

[renago]

Hi .
Short up date :

I welded some U form steel in order to push with an hydraulic jack .
NO WAY !
pls have a look at the photos

I tryed also with a flame torch , didn't move 1 mm .

the joints are in general OK , but the central bearing are not good .
I would like to change them .
after all the shaft will be taking a lot of sand ,mud , dirt , water ecc.
better do it now , then in a no man land .

Any suggestions ????
please.

bye Renago

 

[peteinjp]

Yes the bearings can get very stuck. I would take off the yoke (#1) first and then the bearing separately. The yoke is also requires quite a bit a force so it might be better to take them off individually. Also after having remove the yoke you should be able to get some thin oil on the inner bearing race surface to maybe help with removal. Additionally you could remove the yoke then take out the snap ring (#2) for the bearing possibly you could push The pillow block body #3 off of the bearing down onto the shaft leaving only the bearing remaining in place on the shaft. In that case you could actually cut the bearing off with a small cut off wheel if you had to.

Needless to say this will be much easier if you were placed to u joints at the same time. However here in Japan they were not cheap!



Pete

 

[renago]

I would take off the yoke (#1) first and then the bearing separately

this is what I tried to do with the hydaulic jack .
impossible to separate !
even getting the joke hot with the torch .

at this stage I have only 3 options:
1 , leave things as they are , after all I will be using the winch not so often ....
but will be used in harsh conditions , mud.
2, cut of the central bearings and make some sort of fixing with 2 half shells of bronze ...

3, order a brand new shaft from Toyota , €€€€ , too much for a occasional use .

I am leaning towards solution 1.

ciao Renago

 

[peteinjp]

Actually it seems the bearing could have been removed if the retaining (snap) rings were removed first. But either way you still would have the problem if getting the yoke off. Basically I think you have to get the yoke off to install a new support bearing. Even if you were to make a bushing or poured babbit bearing you would need to turn and polish the corresponding point on shaft of the yoke.

I'm sure you have but I must ask- did you remove the bolt on the end of the shaft 91111-51020.

Pete

 

[jblueridge]

I had this exact same problem last summer.

In the end I filled a steel can with Marvel Mystery oil. I heated the shaft/yoke where the yoke slides on.
When very hot, I immersed the yoke in the oil.
Left it submerged for a day. Tapped it off with a hammer.

 

[renago]

Thanks for replys ,
I think my 3 part drive shaft is slightly different from the photo I posted .
The spiders of the Yokes are not with the clip.
they are pressed in and slightly nipped on the out side .

the pillow block that is where I really have a problem are impossible to take apart .
In fact Toyota is NOT giving them as spare part.
so I decided to take an extreme step . cut apart the pillow block .
here is what I found under them :

as you can clearly see from the photo , the pillow blok bearing is sitting firmly between two rings .
I suspect that these rings are brazed together .
so very difficult to take a part .

any solution to HOW to install a new pillow blok is very welcome .

bye Renago

 

[peteinjp]

Ok- now I understand. I didn't realize that the inner race was remaining there. I thought you had removed it.

This is a really difficult problem. If you must use that driveshaft the only thing that I can think of, although I am nowhere close to being a machinist or expert, would be to turn down and polish the surface on a lathe and then make a new pillow block with machined steel and a poured Babbitt bearing.

Personally I would find a three-piece rebuildable driveshaft from a 70 series or 60 series or 40 series and adjust lengths of the shaft by removing or welding in tubing to fit your application. This would allow you to use greasable joints. Moog U-Joints 395

Alternatively you could produce a custom shaft using small CV joints or driveshaft parts from a small car.

 

[peteinjp]

Maybe look into go-cart driveshaft parts.

Pete

 

[renago]

Thanks for your thoughts Pete,
My orientation is to go towards rabbit bearings , and then custom make the pillow block.
it's the only solution I see .
to remake the drive shaft is possible but costly.
I am a bit un easy in placing the drive shaft in a lathe due to the yokes , and the bottom part of the residual bearing .
we'll se what I can work out .

thanks Renago

 

[jblueridge]

Mine is different from yours.
This photo, which is not great, shows the middle shaft after I painted it.
You can just make out the slot of the shaft key (Woodruff).

 

[renago]

I think yours is the exact match with the part scheme I posted earlier .
Must be the first series of 3 pc drive shaft .
As a matter of curiosity from which car , and gear box ?
4 or 5 speed ?

bye Renago

 

[renago]

Mine is from a Toyota 80 HDJ 1992 .
I am trying to adapt to 78 Hdj , with gear box from an 80 series .

bye Renago

 

[peteinjp]

Again, I'm not an expert and I've never done this, but it seems that somehow you need to finish/polish- basically create an acceptable bearing surface on the yoke if you're going to pour a bearing. I would definitely consult somebody who has made these types of bearings before. Sounds like an interesting project!

Pete

 

[jblueridge]

BJ74 5 speed manual

 

[jblueridge]

You got the bolt out without taking the spider/u-joints apart?

 

[peteinjp]

I believe this is the correct diagram. The yoke is not removable. I believe it's welded on so there is no bolt in the yoke. Anayama trading shows the part is available for yen55,000 or so from Japan. Cheaper if shipped from UAE.

Pete

 

[jblueridge]

I think you are right. Part numbers are different than mine.