Hydraulic Jacks - Military and Commercial

Manufacturers, configurations, Shovels, Axe, Wrenches, Oiler, F/E etc.
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Gordon_M
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Re: Hydraulic Jacks - Military and Commercial

Post by Gordon_M » Sun Jun 12, 2016 7:56 am

Jacks of that size and rating were supplied with the DUKW. I vaguely remember a special bracket in the engine bay just left of the radiator, but I think there's a plate or swivel missing from the top.

If the jack seems a little small for a DUKW, remember that it was only really supplied to lift one wheel off the ground at a time for changing purposes - not the whole vehicle.
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Re: Hydraulic Jacks - Military and Commercial

Post by Wingnutt » Sun Jun 12, 2016 6:19 pm

The cup is definitely missing. Did the DUK have a 3-Ton jack? Except for the filler hole, it looks identical to the 3-Ton Hein-Werner hydraulic jack that Fred shows and describes up-thread, meant for his late war Dodge. With the "[GM]" marking, I was thinking it might've been used on either the 1.5 and 2.5 ton Chevy and Jimmie or both, as Zoob and Quasimodo were saying on the GM Oiler thread. I've PM'd Fred and asked for his assessment. Moving the photos here for convenience.

Before clean-up

Image

After clean-up

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Re: Hydraulic Jacks - Military and Commercial

Post by Gordon_M » Sun Jun 12, 2016 11:57 pm

I think it was a 3 ton. I have the info somewhere in the DUKW ORD 7-8-9 but it is at the other house. Certainly of a size and configuration that would fit the holder.
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Re: Hydraulic Jacks - Military and Commercial

Post by mudbox » Sat Jun 18, 2016 7:18 pm

Can anyone help identify this one?
I picked it up because I could see that OD green under all the layers of gunk but there is no manufacture identification readily apparent to me.
The only markings are MADE IN THE USA, a W and a 2, and the bottom is marked 310-C-1 (maybe...).
Does the 2W mark make this a 2 Ton jack? :?:
Here's some pics.
Image
and the markings
Image
Image
-Jason

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Re: Hydraulic Jacks - Military and Commercial

Post by Wingnutt » Sat Jun 18, 2016 7:36 pm

Highly likely that is a Walker jack, mud, and possible that the 2 is its capacity (tonnage rating). For precedence, Walker (technically, one of their subsidiaries - Ajax) made the late war Willys MB jack, A-12268, a 1-1/2-ton screw jack, and examples of that jack have been found marked with a "W" and a "1-1/2" for the capacity, just as the Willys engineering drawing for A-12268 shows. But, I don't have a record of a 2-ton jack. As far as I know, there was a 1-ton bumper jack (41-J-57), 1-1/2 ton screw jack (41-J-66), and then 3- (41-J-72), 5- (41-J-73), and 7-ton (41-J-73-5) hydraulic jacks. I'll dig a little deeper later.
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Re: Hydraulic Jacks - Military and Commercial

Post by Gordon_M » Sun Jun 19, 2016 12:00 am

Wingnutt wrote:The cup is definitely missing. Did the DUKW have a 3-Ton jack? Except for the filler hole, it looks identical to the 3-Ton Hein-Werner hydraulic jack that Fred shows and describes up-thread, meant for his late war Dodge. With the "[GM]" marking....

After clean-up

Image
Apparently it did. I got back to the other house for the weekend and looked up the DUKW jack in the ORD-7-8-9, it calls up a 41-J-72, just like the late war Dodge jack. I only have the ORD-7 for the non-floating GMC, so it doesn't have the tool listing, but I'd suggest that the GM on your jack means it would be correct for any GM product calling up a 41-J-72. Certainly the DUKW, and probably the CCKW and a range of other stuff too.

The 'new' hydraulic jack for the late Dodge makes a bit more sense now. They didn't want to introduce new jacks and procurement orders into the supply chain, they wanted to reduce the number of jack variants they were already procuring, so they looked at the DUKW / GMC jack and said something like; 'that would do for the new 6x6 Dodge - just standardise it for all of them and bump the procurement order quantity'
Gordon

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Re: Hydraulic Jacks - Military and Commercial

Post by mudbox » Sun Jun 19, 2016 7:01 am

Wingnutt wrote:I'll dig a little deeper later.
Thanks, Wingnutt! I took a flyer with it, because I couldn't read anything on it. It does work though, so worst case, it finds a place in the garage.
-Jason

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Re: Hydraulic Jacks - Military and Commercial

Post by markrdje » Sun Jun 19, 2016 7:49 am

This is not per se to the subject but I have several jacks that don't work, of course they have been setting a long time with no use,so why do they no longer work?
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Re: Hydraulic Jacks - Military and Commercial

Post by Gordon_M » Sun Jun 19, 2016 10:07 am

Very few reasons NOT to work;

1. Oil level
2. Check valve
3. Totally blown piston seal

There should be an oil fill point somewhere. Once they have oil in the top should move, at least a little, when you pump it. If it moves and goes back - check valve stuck.

A totally blown seal would just pump oil out - usually at the top, when you fill it and pump it.
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Re: Hydraulic Jacks - Military and Commercial

Post by markrdje » Sun Jun 19, 2016 10:13 am

Thanks a lot , I'll do what you said
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Re: Hydraulic Jacks - Military and Commercial

Post by lt.luke » Mon Jun 20, 2016 4:41 am

Gordon_M wrote:Very few reasons NOT to work;

1. Oil level
2. Check valve
3. Totally blown piston seal

There should be an oil fill point somewhere. Once they have oil in the top should move, at least a little, when you pump it. If it moves and goes back - check valve stuck.

A totally blown seal would just pump oil out - usually at the top, when you fill it and pump it.
Can they be rebuilt?

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Re: Hydraulic Jacks - Military and Commercial

Post by Gordon_M » Mon Jun 20, 2016 4:45 am

I never have but I'm told seal packs are available for most of the common brands.
Gordon

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Re: Hydraulic Jacks - Military and Commercial

Post by Quasimodo » Sat Sep 23, 2017 2:48 am

Its color is similar to Kelly green and is not olive drab, so I believe it is a civilian jack and not a military jack
I have/had NOS jacks (straight out of WW2 crates packed in sawdust to absorb oil) and they are this Kelly Green colour.

Another thing I just recalled in these crates there was a distinctly conical ASM Hydraulic jack of I think 3 tons capacity in olive drab with decals _ I never have worked out what they were for - anyone know. They were like this in shape (this is a D708) but can't say this is an exact match though:

https://i.ebayimg.com/thumbs/images/g/t ... s-l225.jpg

Happy days of ww2 surplus just about all gone now :cry:

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Re: Hydraulic Jacks - Military and Commercial

Post by Silly's MB » Sun Sep 30, 2018 11:45 am

I picked up this Jack today which I think is a Heine-werner, but is it correct for ww2 vintage?

I am looking for a 7 ton for the 2nd echelon set 2 and this appears to be an 8 ton so slightly over spec.
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Re: Hydraulic Jacks - Military and Commercial

Post by Hartofoak » Mon Oct 01, 2018 2:22 am

I wonder who won this Walker hydraulic jack recently at auction?
https://www.ebay.co.uk/itm/WALKER-VEHIC ... 1438.l2649
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