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Hoist question

R

Rich'sToys

Well-known Member
Location
Southern MN
Here is a picture of the hoist on my '59 F-350. Am I correct in assuming that the plug with the red circle is where I would add hydraulic fluid? There is also a plug near the top of the cylinder where the red arrow is pointing.
I have never seen a set up like this before. The hoist on my other truck only has the plug on the cylinder. Looks like this has a built in reservoir.

mvphoto76134.jpg
 
The plug with the circle is the fill point for fluid. The one with the arrow is likely to be vented since it is a one way cylinder. My 1965 Ford 1 ton has a lift much like that one
 
Please block that up so it doesnt fall on you. Guess wrong on loosening the wrong plug and its really bad. Neighbor is still shook up from the hoist that fell on his friend
a number of years ago, can see it in his eyes when a person mentions working on stuff......

I would assume the top one is a breather for air to get out, and the one on the bottom square tube is where you add oil. Mine looks just like that. Its real fun to add oil
when the hoist is out of oil and you need to add without being able to lift the box.....

Paul
 
I can't see for sure, but is there a hose under the cylinder going to the upper or rod end? if so it pumps fluid from that side to the pressure side and hen to lower
bleeds it back to the rod end. If so you would add enough fluid to the cylinder to get full lift and maybe just a little more. There should be a breather at the top of
the cylinder either way.
 
Looks like the cross member doubles as the tank.

Any hydraulic system should be filled with all cylinders retracted. Since you can't do that, put some oil in it and leave the plug out while you lower the bed. That way if it is too full it will overflow instead of blowing something out, like a pump shaft seal.
 
Yes bottom plug is the fill. I have the same set up. And make sure hoist is
blocked. Many a person died from the box falling.
 
I will definitely block it before going under there. I also know of people who died that way.

And I had also heard about filling it and leaving the plug out the first time I let it back down. Thanks for the reminder about that.

I don't use the hoist that much, but I've owned this truck a long time and have never checked it. On one occasion when I did use it I left it up for a short time and it started to settle back down. So I figured it was about time to check it once. Just like to keep things in working order if possible.

Thanks for the replies!

This post was edited by Rich'sToys on 05/29/2021 at 08:56 pm.
 
(quoted from post at 16:46:46 05/29/21) Man that thing is clean! Can't have ever seen much winter travel in all it's years!
Click to expand...

Funny how guys like us notice the lack of NY rust on anything nice, isn't it?
 

If it has been a long time then maybe you should just drain the oil and put in new as it is bound to have some water in it. Looks like you have a drain plug by the tee coming out of the tank. Or take the line loose at the pump and drain it. Block it up of course. Or lower the bed, drain it, and use a few buck HF hand pump and hose to put new fluid in which is the safest way. Your timber may hold but I've seen timbers in other situations just get crushed/snapped in two when the full weight comes down on the pinch points or the timber may slide and kick out with the same result, neither of which is good for someone leaning in under the hoist/bed.
 
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