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Tool Talk Discussion Forum

Portable Hydraulic Ram

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JAA59

02-02-2008 18:47:42




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I am looking for a portable hydraulic ram to use for pressing on the sprocket on my dozer. I have fabricated all the steel, and now just need the ram itself. I was looking at the cheap Northern Tools 30 ton ram for $39.99. Anyone have any experience with them? I would love to have a name brand like enerpac but I just can't justify the $ for a single (or very limited) use. Thanks.




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JAA59

02-03-2008 06:47:19




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 Re: Portable Hydraulic Ram in reply to JAA59, 02-02-2008 18:47:42  
Thanks guys. I've already done all my research as to making the press, and have spent hours on the steel fabrication building it. The spec. on the press fit is 30 tons according to Cat. I thought of the rental, but haven't been able to locate one here is western NY. Does anyone know if the northern ram is adaptable to an enerpac p39 hand pump? I have never used any of this equipment before, so if you have any info. as to how it works I would appreciate it. Is the hand pump pushing air or hydraulic oil? Is the ram fluid filled? Do the rams work vertically and horizontally? Those are probably dumb questions but I am totally "green" when it comes to this equipment. Thanks.

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135 Fan

02-03-2008 12:42:17




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 Re: Portable Hydraulic Ram in reply to JAA59, 02-03-2008 06:47:19  
They use oil at about 10,000 PSI. With air, you would need a cylinder almost as big as the Cat. As long as the cylinder and pump are both rated for the same pressure, they can be used together. With a porta-power the cylinder can be used in any position. Dave



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Chris(WA)

02-03-2008 05:15:07




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 Re: Portable Hydraulic Ram in reply to JAA59, 02-02-2008 18:47:42  
Search Ebay for enerpac. I bought an Enerpac ram for a hydraulic tool for a fraction of its new cost.Had to rebuild it but an enerpac is worth rebuilding and easy to do. Some of the Northern rams are OK for infrequent use but if you tax them,(full pressure and full extention that is when I have had trouble with them.



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NC Wayne

02-02-2008 23:24:34




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 Re: Portable Hydraulic Ram in reply to JAA59, 02-02-2008 18:47:42  
Don"t know what type machine you"ve got but the drive sprockets on most of the older track machines, especially the CATs, typically press on with updards of 60 tons. Unless you"ve got a ram capable of that your just sptting ito the wind because you"ll never get it tight enough to do any good with a too small ram. Also remember in many cases you"ve got to hold the axel and "press against it" as the sprocket goes on since basically your pulling the two parts together instead of "pressing" on onto the other. if you don"t do this, typically, your gonna be pressing against the bearings which you don"t want to do. Now if you don"t want to spend money on a ram I have seen dad put sprockets on the older machines without actually pressing them. He"d start by cutting a wrench to fit the sprocket nut out of something heavy like 1" plate with a handle about 36 to 48 inches long. Then put the sprocket on and tighten it as tight as possible by hand, and then by hitting the wrench with a sledge. As you tighten the nut occasionally hit the sprocket with the sledge also. Hitting it like this sets up a vibration in the sprocket and will cause it to walk up on, and eventually get tight on, the splines. When you get it as tight as you can get someone to get on the machine and hold the oposite track from turning by declutching and braking it. Then allow the sprocket on the side that your tightening to turn SLOWELY til the wrench hits the ground and just tries to pick the side of the machine up. Just make sure you"ve got it blocked good so it doesn"t come off the blocks when it sets back down. With the pressure on the wrench, and standing off to the side in case the wrench tries to come off, again smack the sprocket with the hammer. If you tighten it like this I can guarantee you it"ll get tight and you won"t have any problems with it coming off. I"ve seen dad do it many many times over the years and we"ve never had a comeback for one coming loose. Whichever way you decide to tighten it, be careful and good luck.

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jhill52

02-02-2008 19:47:51




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 Re: Portable Hydraulic Ram in reply to JAA59, 02-02-2008 18:47:42  
Try a rental shop. I rent little used tools all the time.



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Oldoaky-2

02-03-2008 09:52:33




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 Re: Portable Hydraulic Ram in reply to jhill52, 02-02-2008 19:47:51  
This is not a little tool to be used.



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