Engine Hoist Piston Issue
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Junior User
Joined: Oct 2004
Posts: 99
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Engine Hoist Piston Issue
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I have a 3-ton engine hoist that goes up about 1/2 way and then stops, it won't go any farther. It is an older used one. Could it be low on fluid? This is what I know. 3-ton ram, there is a rubber plug on the upper wall of the cylinder, has a hole for air to move in and out. The pump is the simple hydraulic jack type with a bar going up and down. The relief valve is also located there. I took the relief valve out and there is hydraulic fluid in there (I know cause it squirted me in the face) lol. Do I add more fluid in that relief hole, if so how much? or is there something else I am unaware of?
I have a 3-ton engine hoist that goes up about 1/2 way and then stops, it won't go any farther. It is an older used one. Could it be low on fluid? This is what I know. 3-ton ram, there is a rubber plug on the upper wall of the cylinder, has a hole for air to move in and out. The pump is the simple hydraulic jack type with a bar going up and down. The relief valve is also located there. I took the relief valve out and there is hydraulic fluid in there (I know cause it squirted me in the face) lol. Do I add more fluid in that relief hole, if so how much? or is there something else I am unaware of?
Post Fiend
Joined: Mar 2004
Posts: 24,418
Likes: 3
From: San Francisco, Ca.
That hole where the rubber plug goes sounds like it's the fill hole for hydraulic fluid. If it is, I think you have to stand the cylinder upright and fill it up to the bottom of the hole. Put the plug back in, then bleed it by opening the relief valve and pumping the lever several times until the all of the air is gone. I'm pretty sure that's how it's done; at least on my hydraulic jacks. Good luck.
Fleet Owner
Joined: Jan 2004
Posts: 26,007
Likes: 575
From: Brentwood,CA
yes make sure the ram is all the way in and the bleed screw is open a little add fluid replace the plug and pump the handle 10 times opening up the bleed screw until fluid comes out then tighten and enjoy
