Jack questions....

[Badasssapper67]

I got these jacks at an estate sale. They went cheap because no body could figure out if they worked. I knew the experts here would know how to breathe life into them again.

I'm having my wife put pictures of them on here because I still cant figure out how to do it, so I'll have her post them after this post

 

[Badasssapper67]

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[Badasssapper67]

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[Badasssapper67]

The light blue jack wont pump up. I would guess that the valve that lets it down is stuck open but I have no way of knowing. I put fluid in it and tried to bleed it but nothing works. A couple times that I pumped it real fast I could see that it was trying to go up but the pressure just bled off

The really old rusty green one I got to go up, but now it wont come down. It didn't work at all when I got it but I put fluid in it and researched the threads here and got it to go up. It leaks really bad from underneath the jack, Im guessing it's either from this big fitting on there or the plumbing that goes to the ram. I'll add more pictures if there are more questions, please advise.

 

[Badasssapper67]

Also, I couldn't find the names of the brands on these jacks. The labels are so faded that brushing the dirt off of them took the lettering with it. The rusty green one's casters are actually riveted on the body of the jack so Im guessing it's pretty old.

If you have any ideas of what brand and capacity the jacks are let me know.

 

[Hiball]

Blue one is a Walker 780 10 ton, Green one is a weaver, should be some stamping on the hydraulic unit Wa-?? Which would indicate the model. I wouldnt waste time on trying to make them function, expect them to need full re-seal at Min, you can get walker parts via numerous suppliers, utilize castle equipment for all your Weaver needs including diagrams, soft and hard parts.

 

[Badasssapper67]

Wow Hiball that was fast! You're the man. Question about the Weaver, it's cylinder is really pitted from rust, is it going to just chew up any seals I put on it?
I'll order the kit for it once I find out if the ram needs to be replaced or what not.
If you want more pictures let me know.

 

[Badasssapper67]

Here's the numbers I saw is this what tells you the model number?


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[Hiball]

Here's the numbers I saw is this what tells you the model number?


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73 is a 4 ton, If the cylinder is bad, it will chew up the piston seal, if the Ram (rod surface) is bad it will obviously prevent a good seal on any oil that gets past the piston seal. Dependent on how bad the for surface is, you can try cleaning up the sharp edges or check on a replacement CL is Castle Equipment. Btw the 780 has specific kits dependent on The main ram seal material, if you can't read a series you will need to verify physically.

 

[Badasssapper67]

If the 780 series number is on a tag then I'm screwed. If it's cast into the jack somewhere then I might have a chance. Where would the series number be found? I assume it will be a number like 780x, correct?

 

[Badasssapper67]

Also I should ask, if they're worth rebuilding. Given they are what they are, once they're rebuilt will they be worth what I put into them? Are the brands good brands or are they the Kmart of their time?

My plan is to keep one and sell the other to recoup the money I spent at the garage sale.

 

[Ponchoguy]

Also I should ask, if they're worth rebuilding. Given they are what they are, once they're rebuilt will they be worth what I put into them? Are the brands good brands or are they the Kmart of their time?

My plan is to keep one and sell the other to recoup the money I spent at the garage sale.

A USA made Walker floor jack was like the Chevy 350 of the V8 industry---good to have, reliable and a workhorse. I have one from '84 that was saved from the curb, and except for a new universal joint I had to put in this past spring, it's been trouble free.

 

[Hiball]

If the 780 series number is on a tag then I'm screwed. If it's cast into the jack somewhere then I might have a chance. Where would the series number be found? I assume it will be a number like 780x, correct?

Whenever your dealing with a jack as old as the 780, or any Jack for that matter it advisable to inspect internals prior to purchasing a kit anyway, especially when they are pricey, like I said you can visually inspect the seal type upon disassembly .

Also I should ask, if they're worth rebuilding. Given they are what they are, once they're rebuilt will they be worth what I put into them? Are the brands good brands or are they the Kmart of their time?

My plan is to keep one and sell the other to recoup the money I spent at the garage sale.

I wish I could tell you the answer to that question, but it has too many variables including initial cost, total cost to rebuild them, local market on used jacks etc... If I had to choose one to keep.. It would definitely be the Weaver, it's a very simple design, still has manufacture support etc.

 

[Badasssapper67]

Any suggestions on a quality kit for the 780? I do not want to skimp or take any chances when it comes to a jack and Im leary about who to buy from since I know so little about jacks and all that makes them good or less than good.

 

[Badasssapper67]

Any ideas about why the Weaver jack wont go down? Before I can tear it apart I'll need to let the jack down.

 

[Hiball]

Any suggestions on a quality kit for the 780? I do not want to skimp or take any chances when it comes to a jack and Im leary about who to buy from since I know so little about jacks and all that makes them good or less than good.

There are a handful of suppliers still around today, albeit shrinking every year. In my Signature is a Number to Hydraulic Parts Supply in Sawyer Kansas, the Owner Steve is probably the most knowledgable guy I know, his prices are very reasonable, with that said it doesn't hurt to price check via Lazzars, blackhawkparts, or a simple Google search. You definitely want New seals, nothing that has been sitting on a shelf for 20 years, so be Leary of any OEM Walker kit. I will say.. The 780 isn't the easiest Jack to rebuild, it takes a 2nd set of hands to install the Humongous Ram, it's very easy to damage the seal face if your not careful, and I repeat... Inspect the Jack components prior to buying a kit, I always took care of my customers and accepted returns, not everyone has that policy. It's one thing to say you are going to rebuild a Jack, GJ is littered with Hopes and Dreams, especially one these more complex models.

 

[On-Wheel]

Any suggestions on a quality kit for the 780? I do not want to skimp or take any chances when it comes to a jack and Im leary about who to buy from since I know so little about jacks and all that makes them good or less than good.

See phone # in hi balls post.I bought a kit from them last month.Nice quality kit!

 

[Hiball]

Any ideas about why the Weaver jack wont go down? Before I can tear it apart I'll need to let the jack down.

Is the handle linkage connected at the kick out near the bottom? What about at the spring? The release works by "pulling" the release stem out against the springs on the hydraulic unit.

 

[Badasssapper67]

Thanks to everyone for the interest and the help. I will rebuild these jacks, how ever, after all the times I wanted to document projects so I could post it on here, once I sat in my shop blam! There's no way Im going to take the time to take the pictures and try to remember why Im taking the pictures, I don't know how guys do it. They've got something I don't.

 

[On-Wheel]

Hey I'd suggest sending it out for service,just the pump.Chances are there's tools that you can't buy to do the job.I'd ask when a good time would be to send in.He could be booked two weeks out.Call # in hiball post.

 

[Badasssapper67]

Since the weaver is the most simple, I'll start with it.