Four Ton Auto Specialties Jack and Handle
 

This the jack i found. Need restoration a reproduce parts missing.

The handle

Auto Specialties Jack Handle
 

Hi Mariano,

That is so good of you to make the drawing of the jack handle and post it here. No doubt others will be glad to have the dimensions and photos also. Thank you.

I will use them to make a reproduction for my smaller Auto Specialties jack used on the 15 CWT trucks.
I have just about given up ever finding an original handle for mine so this will do quite well.

Haven't taken mine apart but they seem pretty simple. What part is missing on yours?

Cheers,

Hi Jacques!

I am pleased to share information with all of you.
I hope they can reproduce a lot of handles
The piece that seems to be missing is a cover that touches the main body and accompanies the mobile part. A kind of bushing that keeps everything in place without allowing both screws to rotate and act.
I don't know if you understand what I am describing .... I have a hard time using technical words.

4 ton Auto Specialties jack
 

Hi Mariano,

Is the attached photo showing the part you are missing? I could not see a similar part in your photos. Not sure what it would be called myself.

Cheers,

No Jacques. An intermediate tube is missing...

And the upper part..... what is the name?

Hi Mariano,

That part is usually referred to as a "Saddle".
It might be difficult to reproduce exactly as it looks to be a cast iron/steel part or perhaps a forging. No doubt some clever fabrication would make a good substitute in any case.

Cheers,

Hi Jacques, thank you, this saddle rotate 360°?

Auto Specialties Jack- Saddle
 

Hi Mariano,

Yes it rotates 360 degrees.

The saddle on my smaller 15 CWT jack is 2" wide and 3" long. If the same saddle was used on both large and small jacks I can post a few close up photos and measurements to aid fabrication of a replacement.

Perhaps another MLU member can verify if the saddle on the 4 ton jack is the same size?

Cheers,

Hi Jacques, thank you for your help.

Today I started to reproduce the missing tube. Take a tube of greater diameter and with a longitudinal cut reduce the diameter to the necessary measure. Then a bit of lathe to lower the tube to the necessary diameter since it was cylinder with blows and there was not a perfect circumference.

Next weekend I will continue with the restoration. It remains to have some guides so that the piece does not rotate, and the upper seat.

Another post about this type of Jack
http://www.mapleleafup.net/forums/sh...d.php?p=268706
http://www.mapleleafup.net/forums/sh...d.php?p=250490

I have some questions to know how to advance in the construction of the saddle and the ring under the saddle.
Is the ring fixed to the tube that is under it or does it also rotate with the saddle?
If the ring is fixed, is it welded to the tube?
Thanks in advance

Auto Specialties jack- Saddle
 

Hi Mariano,

The saddle rotates in the upper tube. The tube does not turn.

There is a large round head rivet that holds the saddle to the tube. it is free to rotate also in the tube and the saddle. Without pulling mine apart I am not sure how the rivet is attached to the upper tube. The saddle rotates in that collar at the top of the tube. That is the ring you refer to in photo. It is part of the upper tube.

Again, I am only referring to the smaller jack but in the photos they seem the same at the saddle area for both size jacks.

Hope this helps.

Cheers,

Thank you very much for your help Jacques!
Now I know how this whole system works and I will try to reproduce it as accurately as possible.

Auto Specialties Jack- Saddle
 

Hi Mariano,

Glad to be of some help. Here are a couple more close ups of the saddle on my smaller jack which may aid fabrication.

As a matter of interest, on the smaller jack the upper tube is 1-11/16" in diameter, and at the collar it is 1-15/16" in diameter. Wonder how that compares to the 4 ton jack?

Cheers,

Hi Jacques
Great help with this close ups pics!!

Next Friday I will return to the workshop and I will be able to start the reproduction

Thank you very much!

Out of curiosity, I contacted the U.S. Jack Company about this series of Screw Jacks. They purchased the tooling for the older series of hydraulic and screw jacks from Auto Specialties in 1988 when Auto Specialties closed. The older documentation had also been obtained in the transaction.

Unfortunately, in 2000, U.S. Jack Company had a massive fire at their plant and much of the archive documentation was lost for these jacks.

The only likely surviving paperwork is now probably in Military Parts Listings and manuals that may still be around.

David

Good to know this piece of history about this manufacturer
Thanks David for sharing!

Today more work with the jack

Adjusting tube and making the saddle

Making the ring too.

The saddle

Very nice work! :thup2:

Thank you Tony! Jack works again! Now need paint!

Thanks for that Mariano, it's very helpful to find or make the missing handle for my jack: http://www.mapleleafup.net/forums/sh...ad.php?t=34620

Nice work on the restoration of that jack!