Another old Sears Jack

jawnd393 · Feb 27, 2011

On a drive from Florida back home to Indiana, I stopped and picked up this jack, from a Atlanta craigslist seller for $40.
It's a Sears 727.12100. I think it's a Blackhawk. Anybody know what Blackhawk model it could be.
It's different from my other Sears jack which is like a Blackhawk SJ-2

http://www.photoshop.com/users/johnd393/assets/a54d5b5e7dda4fefb9830065b92ffec0[/url]

[IMG]http://www.photoshop.com/users/johnd393/assets
/68c374fc9dfe43d8adea405fb6c16c18

[url]http://www.photoshop.com/users/johnd393/assets/9d1d6c84369e406290abc0a9fb382eec[/url]

[url]http://www.photoshop.com/users/johnd393/assets/f49238a235b24452ba0ea7d72d90d8f9[/url]

Charles (in GA) · Feb 27, 2011

Blackhawk. I have that exact same jack.

http://www.panzittasales.com/PDFs/BLACKHAWK/SJ1F_SJ2F.pdf

http://www.panzittasales.com/blackhawkjacks.htm

Charles

jawnd393 · Feb 27, 2011

I thought it was different. There's a sheet metal cover on the front and back that makes it look a little different. The back edge of the side plates is square on one and angled on the other. The front wheels are wider. The part number on a tag on the power unit is K680900. But, the number on the casting is the same. I just put the 2 sears jacks side by side. On one jack the handle stops at full up. On the other it will continue to pump with decreased resistance. Other than that they appear identical. Here is the parts drawing from the Sears manual for my other jack. (Picture added to first post.)You can see the different shape of the side plate.

jawnd393 · Mar 7, 2011

Sears 727.12100 vs 272.12102
I took it apart cus it leaks down. The plastic piston cup was disintegrated just like my other sears jack. I wondered how the up limit worked. There is a groove in the ram with a slightly oversized ring that hits the endcap at full up. The ring presses on a valve down the center of the ram.
Another difference in these 2 similar jack is the pump body has a end cap that allows pulling out the plunger. I've not found a parts blowup showing this version of these parts

JohnD

TK LP · Mar 7, 2011

I don't know what Blackhawk number it is, but it does look familiar.

CRTDI · Mar 7, 2011

I believe the Blackhawk model number would be SJ-1 (1-1/4 Ton) or SJ-2 (1-1/2 Ton).

buick64203 · Mar 7, 2011

Interesting. I have a Blackhawk SJ-2. I inhereted it from my late uncle. Best jack I ever owned. I have a couple and I always grab this one first. So these were sold through Sears back in the day? That would make sense as my uncle was a big Sears guy.

jawnd393 · Mar 16, 2011

Left is Sears 727-12100, Right is 727-12102
You can see larger plunger diameter on the 12100.

The whole family

CRTDI · Mar 16, 2011

Interesting...would it be safe to say that the Sears model no. 727-12100 is a rebadged Blackhawk SJ-2 and your original jack, Sears model no. 727-12102 that you thought to be an SJ-2 is actually an SJ-1? :headscrat

CRTDI · Mar 16, 2011

Here are the same jacks wearing Blackhawk colors: :beer:

jawnd393 · Mar 16, 2011

Thank you for that page.
The 727-12100 power unit is like the one shown.
The 727-12102 power unit is like that in the SJ-1/SJ-2 parts list pdf.
Apparently it's different revisions of the SJ-2
Both of these jacks are 1-1/2 ton, the SJ-1 is 1-1/4 ton.
Johnd

CRTDI said:
Here are the same jacks wearing Blackhawk colors:

buick64203 · Mar 16, 2011

Here's a couple of pics of my Blackhawk SJ-2. Best jack Ive ever owned.

May Pop · Mar 16, 2011

I also have a Sears version I bought new in 74 or 75. Are parts still available for these?

jawnd393 · Mar 18, 2011

May Pop said:
I also have a Sears version I bought new in 74 or 75. Are parts still available for these?

Yes, Forum member Hiball sells parts. I bought from, and recommend, him.
If you search this forum, the web, and eBay there are other part sources.
Johnd

jawnd393 · Apr 5, 2011

The nice people in Atlanta that sold me the 727.12100 jack, found and mailed the manual for it. Here's the parts blow up.

goody4her · Apr 5, 2011

Do you have any idea where I can get one of those wheels? Thanks for the pic, I appreciate it.

toolmiser · Apr 5, 2011

I have the "American" brand of that jack. I've been meaning to post it. It is a brownish gold with white. My father purchased it in about 1976. Nice jack, rated for 1 1/2 tons.

goody4her · May 17, 2011

Best jack Sears ever made, they do not build things like they use to.

Charles (in GA) · May 17, 2011

goody4her said:
Do you have any idea where I can get one of those wheels? Thanks for the pic, I appreciate it.

Someone who is half ways handy with a lathe could make you a functional wheel in short order. Might not have the lightening holes in it, but it would work.

Charles

goody4her · May 22, 2011

Thanks for the great idea.

georgiadave · May 23, 2011

www.colsoncaster.com

Here is a cheap source for your caster wheels. They may be able to direct you to a retail place close to you, or sell to you by mail. Oddly enough, the wheel business is pretty big, as there are thousands of applications for metal, rubber, etc wheels of all sizes.

georgiadave · May 23, 2011

http://www.aiecasters.com/wheels-castiron.htm

Here is where I got my rear wheels for a Walker Jack. I think the total for two wheels was about $11 over the counter. They are in Atlanta.

Osborne · May 23, 2011

Whats the 2 ton model number in TK.LP's pic?

goody4her · Jul 22, 2011

How much would it cost to rebuild this Craftsman jack?

goody4her · Jul 27, 2011

Can a lack of oil make the jack go down by itself?

Arne73 · Jul 28, 2011

Here's my Sears 1 1/2 ton compared w/ a 2 ton import. I'm not certain of the Sears P/N, it's buried right now but my dad worked at Sears automotive in the 70's and it was a closeout on the last of the US jacks. It's a heavy beast but I love it.

goody4her · Oct 29, 2011

I love this jack, too bad it stopped working.

Hiball · Oct 29, 2011

goody4her said:
I love this jack, too bad it stopped working.

We've discussed via PM how to get it back working.. :thumbup:

schmittr · Jun 25, 2014

I need the chk valve parts shown in the above IPB. =Does anyone know the contact # for "Hiball" or another source? P/N's 65, 72, & 73.

THX! Ron

jawnd393 · Oct 12, 2020

Another Sears 727.12102 Sears jack has followed me home. Was browsing Facebook Marketplace and spotted it for $30.

BlakeTheCarGuy · Oct 12, 2020

jawnd393 said:
Another Sears 727.12102 Sears jack has followed me home. Was browsing Facebook Marketplace and spotted it for $30.

Great. Does it work or need fixed? Let’s see some pictures.

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jawnd393 · Oct 13, 2020

There's pictures of my other ones in post #8. It's pretty much identical and in the same cosmetic condition. Seller said it leaks down and he replaced some of the seals but not the main one. I wouldn't have bought it if it was missing parts or had a broken wheel or something. I've not really tested it other than pump the handle and see if it starts to go up. I want to find a new main seal for it, but I'm not in a hurry to work on it.

I'm working on the brakes of my daily driver Chevy Malibu, Having trouble getting a hose connection to not leak, and once that's done I'm trying to rebuild the front suspension of a Chevy Trailblazer RWD. It's my first SUV ever. In pretty good shape for the $1250 I gave for it.

BlakeTheCarGuy · Oct 13, 2020

jawnd393 said:
There's pictures of my other ones in post #8. It's pretty much identical and in the same cosmetic condition. Seller said it leaks down and he replaced some of the seals but not the main one. I wouldn't have bought it if it was missing parts or had a broken wheel or something. I've not really tested it other than pump the handle and see if it starts to go up. I want to find a new main seal for it, but I'm not in a hurry to work on it.

I'm working on the brakes of my daily driver Chevy Malibu, Having trouble getting a hose connection to not leak, and once that's done I'm trying to rebuild the front suspension of a Chevy Trailblazer RWD. It's my first SUV ever. In pretty good shape for the $1250 I gave for it.

Cool never had to take a jack apart or rebuild one lol also never actually seen a used jack for sale either. At work we have the Daytona ones from Harbor Freight and they are working great I have the same one at home. When they start to leak the boss just replaces them. And congratulations on the cars man I’ve got 7 cars and never will stop working on them lol.

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jawnd393 · Oct 13, 2020

These are American made jacks. There is a solid feel and smoothness of function that is superior to many. I have a Harbor Freight jack which is maybe a cheaper one than the Daytona ones. It is hard to regulate the drop if you want to lower it slowly or just a little. The one good thing about the HF jack is it weighs about half as much if I want to throw it in the car and take it somewhere. It's the orange on in the pix at post #8.

BlakeTheCarGuy · Oct 13, 2020

jawnd393 said:
These are American made jacks. There is a solid feel and smoothness of function that is superior to many. I have a Harbor Freight jack which is maybe a cheaper one than the Daytona ones. It is hard to regulate the drop if you want to lower it slowly or just a little. The one good thing about the HF jack is it weighs about half as much if I want to throw it in the car and take it somewhere. It's the orange on in the pix at post #8.

That’s an old school Harbor Freight one. I will agree it is hard to drop it a small amount. The Daytona are very heavy the Pittsburgh jacks are pretty light especially the aluminum racing ones. If I would have known that Craftsman and Sears would of been going down a long time ago I would have bought some of those older jacks I do have a Craftsman trolley jack that was given to me by a coworker of my dads and it’s a pretty good one USA made too. I use it as my travel one since it’s light.

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jawnd393 · Oct 14, 2020

Just figured it out. My HF jack is 10 years old. Was $59.95. Looks like I had paid $6 for a 1 year extended warranty.

BlakeTheCarGuy · Oct 14, 2020

jawnd393 said:
Just figured it out. My HF jack is 10 years old. Was $59.95. Looks like I had paid $6 for a 1 year extended warranty.

Cool. Mine will be a year old this December and the ones at the shop I work at will be two in January.

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Jay K · Mar 15, 2022

jawnd393 said:
Left is Sears 727-12100, Right is 727-12102
You can see larger plunger diameter on the 12100.

The whole family

Hello. I am looking to rebuild a 727-12102. Can you reccomand a good supplier? Thank you from Alabama.

sip · Jul 20, 2024

I just picked one of these 727.12102 jacks up to replace a stolen jack. It works, but the stroke is only on the last foot or 18 inches where it pumps. Is the driver supposed to extend further so you get more movement per stroke?

Hiball · Jul 20, 2024

sip said:
I just picked one of these 727.12102 jacks up to replace a stolen jack. It works, but the stroke is only on the last foot or 18 inches where it pumps. Is the driver supposed to extend further so you get more movement per stroke?

Not really, It’s designed to give maximum stroke when deep under a vehicle, not today’s vehicles with pinch welds/outer lift points.

Another old Sears Jack

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