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Old 06-13-2008, 06:18 AM   #1
tbgallant
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Default Can I fix my engine hoist jack cylinder?

Used my engine hoist / cherry picker last night for the second time since ownership (purchased last summer/fall).

The darn jack cylinder would raise an inch or two (stroke) and then just stop. I'd pump it'd raise 1/16" to 1/8" and then just come right back down. Like it was 'stuck'.

I'm planning on taking it back, but I might need it this weekend before I get a chance to take it back. Is this just 'air' in the cylinder and I can bleed it.. or is it a busted seal?

If it does need to be bleed, how do I do it (and can I use ATF or PS fluid in a pinch for hydraulic fluid?)

Thanks

Tim
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Old 06-13-2008, 10:00 AM   #2
ZRX61
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Default Re: Can I fix my engine hoist jack cylinder?

Are there any signs of the fluid leaking out? I know Horrible Fright sell replacement rams. If yours has a blown seal, Motion Industries will probably have them.
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Old 06-13-2008, 10:01 AM   #3
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Default Re: Can I fix my engine hoist jack cylinder?

open the valve to put the arm down,and open the fill plug too,then pump it rapidly about 30 times or so,then close it and try it.atf does work in a pinch,but try jack oil or #32 hydraulic oil.
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Old 06-13-2008, 11:06 AM   #4
tbgallant
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Default Re: Can I fix my engine hoist jack cylinder?

No signs of fluid leakage!

Thanks clueless, so this will 'bleed' the ram? Does my problem sound like a air/bleeding problem?

Thanks

Tim
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Old 06-13-2008, 01:06 PM   #5
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Default Re: Can I fix my engine hoist jack cylinder?

make sure the ram is all the way down,then do the procedure.also keep the reservoir full when you do it also.if that doesnt solve it even after a few tries at it,the check balls in the system could be sticking or the seats have a nick or piece of dirt in them holding the reservoir checkball open.
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Old 06-13-2008, 02:47 PM   #6
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Default Re: Can I fix my engine hoist jack cylinder?

Just courious what brand this is?
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Old 06-13-2008, 04:06 PM   #7
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Default Re: Can I fix my engine hoist jack cylinder?

I would first make sure it is full of hyd jack oil. Report back after that! UB
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Old 06-14-2008, 11:28 AM   #8
tbgallant
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Default Re: Can I fix my engine hoist jack cylinder?

Thanks for the help guys, I'll grab some hydraulic oil and see if I can fix it up (less hassle then taking it back). The brand is the house brand from Princess Auto (basically Canadian Harbour Freight).

I do have a question though, what is this plug with a slot in it for:

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Old 06-14-2008, 11:43 AM   #9
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Default Re: Can I fix my engine hoist jack cylinder?

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Originally Posted by tbgallant View Post
Thanks for the help guys, I'll grab some hydraulic oil and see if I can fix it up (less hassle then taking it back). The brand is the house brand from Princess Auto (basically Canadian Harbour Freight).

I do have a question though, what is this plug with a slot in it for:

I have rebuilt many hydraulic units, but I am self taught so I cannot tell you what the name or purpose of some things such as the plug you have asked about are for, only what I would expect to find if I removed such a plug. In this instance I suspect you might find one or two ball bearings, or perhaps a spring and ball bearings or the like. I would first say leave that alone for now, and remove the rubber plug, or small bolt screwed into the side of the cylinder midway up the bottle. Make sure when you do this that the ram on the bottle is in the seated or resting position with the ram seated in the bottle. also give the little jack lift control screw at the jack's base a turn or two to the left (counterclockwise) not totally removed, only backed off a mite. Now fill the bottle through the fill hole midway up the bottle till you cannot add any more. replace the plug, or bolt in the side and turn the t shaped bolt at the base to the right and see if the thing will jack up.
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Old 06-15-2008, 12:23 PM   #10
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Default Re: Can I fix my engine hoist jack cylinder?

I am waiting.
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Old 06-15-2008, 02:48 PM   #11
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Default Re: Can I fix my engine hoist jack cylinder?

Still waiting?
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Why bother? Natural selection will take care of them. If it doesn't, a 12-gauge can take care of the unnatural selection...
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Old 06-15-2008, 09:09 PM   #12
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Default Re: Can I fix my engine hoist jack cylinder?

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Still waiting?
Yes I am!
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Old 06-15-2008, 09:54 PM   #13
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Default Re: Can I fix my engine hoist jack cylinder?

Quote:
Originally Posted by tbgallant View Post
I do have a question though, what is this plug with a slot in it for:

Most likely that it the pressure relieve valve. DO NOT adjust! Keep your hands off. Put the tools away. What screw?

That is a safety feature you don't need to fool with.

Put some oil in it so holmberg can catch his breath.
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Old 06-15-2008, 09:57 PM   #14
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Default Re: Can I fix my engine hoist jack cylinder?

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Most likely that it the pressure relieve valve. DO NOT adjust! Keep your hands off. Put the tools away. What screw?

That is a safety feature you don't need to fool with.

Put some oil in it so holmberg can catch his breath.
LOL!
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Old 06-16-2008, 05:48 AM   #15
tbgallant
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Default Re: Can I fix my engine hoist jack cylinder?

Hey, sorry was busy with a clutch replacement all day yesterday!



Haven't had a chance to track down some oil yet. I'll update this tomorrow with the results.

Thanks!!
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Old 06-16-2008, 08:07 AM   #16
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Default Re: Can I fix my engine hoist jack cylinder?

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Originally Posted by tbgallant View Post
Hey, sorry was busy with a clutch replacement all day yesterday!



Haven't had a chance to track down some oil yet. I'll update this tomorrow with the results.

Thanks!!
How do you like that Wilton vise? Just wondering how yours is holding up...
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Quote:
Originally Posted by Moose-LandTran View Post
Why bother? Natural selection will take care of them. If it doesn't, a 12-gauge can take care of the unnatural selection...
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Old 06-16-2008, 10:49 AM   #17
tbgallant
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Default Re: Can I fix my engine hoist jack cylinder?

Wilton vise? I wish... that is just a cheap vise from Canadian Tire. When it was purchased it had a lifetime warrenty.. but now the same ones they sell do not, so not sure how that is going to work out if I bust it.

The blue paint is chipping off quite easily as well, not too concerned. It is a working vise in a working personal garage. I'm not TOO hung up on cosmetics
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Old 06-16-2008, 10:50 AM   #18
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Default Re: Can I fix my engine hoist jack cylinder?

Quote:
Originally Posted by tbgallant View Post
Wilton vise? I wish... that is just a cheap vise from Canadian Tire. When it was purchased it had a lifetime warrenty.. but now the same ones they sell do not, so not sure how that is going to work out if I bust it.

The blue paint is chipping off quite easily as well, not too concerned. It is a working vise in a working personal garage. I'm not TOO hung up on cosmetics

trust me, it's the same as the Wilton version - down to the chipping blue paint.
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Quote:
Originally Posted by Moose-LandTran View Post
Why bother? Natural selection will take care of them. If it doesn't, a 12-gauge can take care of the unnatural selection...
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Old 06-16-2008, 11:26 AM   #19
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Default Re: Can I fix my engine hoist jack cylinder?

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trust me, it's the same as the Wilton version - down to the chipping blue paint.
Well then, its got the same paint quality as my Wilton. Its been very dependable and strong but its blue paint has chipped off all around the jaws. Not concerned on the looks of my vice just as long as it works good.

OP - hope the clutch job went smooth.
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Old 06-17-2008, 01:39 PM   #20
tbgallant
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Default Re: Can I fix my engine hoist jack cylinder?

Update, just took the ram back to Princess Auto and they gave me a new one (didn't bother mucking with it). Glad I did because they gave me a much better ram, 8 ton longstroke. So smooth and pumps up WAY faster than the original.

Regarding the vise, works good but I really doubt it is the quality of a Wilton. It was only something like $30 on sale.

I don't care about the paint either, as long as it works (which it does so far )

Thanks for the help guys, if I think of it I'll update with a picture of the new ram! haha
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