|I.M. OUTAHERE||22/12/2018 06:19:59|
|1468 forum posts|
Check out the puller / press this guy builds !
4743 forum posts
Would make a good ME project
Has there ever been a hydraulic ram build before?
2933 forum posts
Put the above code into YouTube.... 'no results found'... ?
|Nick Hughes||22/12/2018 11:55:20|
255 forum posts
Direct link:- **LINK**
|Neil Wyatt||22/12/2018 12:03:51|
18777 forum posts
Link works here.
|Neil Wyatt||22/12/2018 12:10:54|
18777 forum posts
Nice enough concept, but not exactly the king kong of hydraulic presses...
|John Rudd||22/12/2018 13:06:09|
|1439 forum posts|
Personally, I liked the versatility of it, pulling and pushing, die punching.....very good for a home made project...
|Ron Laden||22/12/2018 13:17:56|
2248 forum posts
+1, I thought just the same, certainly versatile and well thought out.
|Clive Foster||22/12/2018 14:19:55|
|2837 forum posts|
Interesting project but you'd almost certainly need to spring for the plans to get details on the hydraulic seal.
Wonder if a defunct car suspension damper, or Macpherson strut if you wanted to go bigger, could be made to work. Theoretically replacing the valved piston head with a simple solid one and adding suitable hydraulic ports should get you close but I'm sure there is a bit more to it than that.
Major issue for ordinary guy or gal in the shop is needing an external hydraulic pump. Pretty much hafta purchase it and even a hand pump isn't uber cheap. Perhaps an elector-hydraulic power steering pump out of a car would do if you wanted power drive.
Got something similar, but smaller, on the "I'll build it when I need it" list using one of the common "12 ton" puller rams that can be found for £15 (ish) on E-Bay. Short stroke and hafta twiddle a handle but effective.
Having made my version of the Land Rover tool LRT-54-008 to shift the steering ball joints on my P38 earlier this year I'm about half way there. I used the long studs out of a "cheapy-chinee" milling clamp and hold down kit along with the sleeves and plates out of a couple of universal bush removal tool-sets found more or less affordable off E-Bay.
Plan A being to use the universal kits to do the job but was underwhelmed by how well, or rather how badly, the universals fitted. (Objectively using such universal kits was a job for one of the trained octopuses Reliant dealers used to keep for changing Number 3 spark plug and setting distributor points on Regals and Robins.) Normal single Homo Sapiens complement of hands isn't really enough to get everything in, lined up and held in place! Even with really powerful verbals!
So I got making. Could have saved myself over £100 if I'd done that in the first place. If I'd known the sizes in advance of course. But dropping £100 and bit on t'Bay seemed a good bargain for turning the front suspension and steering re-furb into a one weekend "just do it" job.
My shop and garage gremlin colonies decided to hold a really big party and invited the whole town to play. Seems like they all came. Bought their friends and relations too. Including cousin Joe G from Australia.
|Roger Williams 2||22/12/2018 14:43:42|
|333 forum posts|
|Paul H 1||22/12/2018 15:12:46|
|37 forum posts|
Super video. As a home engineer rather than a model engineer it really appealed to me. There is a lot of single tip threading which they made look so, so easy. They do have a video for a hydraulic pack and another on making a hydraulic cylinder. Like Clive I wondered about a power steering pump for a stand alone unit, though if I was stuck I would just run lines of the tractor.
They do have what look to be some other very interesting videos on their channel.
|592 forum posts|
have u seen the "FAT BIKE" they built ?
just looking for better wheels right now.......it'll be electric tho......
my knee's are junk.......
it was this crowd that made me buy a carbide tipped chop saw, OH and the same thing but a circular saw.......hahaha........
|not done it yet||22/12/2018 15:53:43|
|6346 forum posts|
I’ve always managed with twiddling the little tommy bar, butI expect that, with little technical knowledge, the ram screw could be operated by a battery drill for all but the hardest jobs, these days.
|Simon Williams 3||22/12/2018 17:21:31|
|605 forum posts|
Good evening gents, and ladies as well.
I've been playing with this for some while, having bought a cylinder (ram) and hand pump from a car body straightening kit. I haven't adapted it for bearing pulling as yet, as I want it for pushing.
It's shown here with a simple folding attachment. It's essentially two cheek plates in 10 mm MS plate carved out with the gas axe, with 50 x 25 cross spacers in BMS, threaded each end for M12 HT bolts. The top spacer got bent fairly quickly because there is a gert hole through it into which the nose of the cylinder fits (threaded) so it has been reinforced. The cylinder is single acting - i.e pressure extend, internal spring return.
However I have discovered that the working pressure is the key to having something useful. Hydraulic steering on cars mostly seems to work sub 1000 psi, agricultural tractors auxiliary hydraulic service is typically 2000 psi max, this simple hand pump works to about 5000 psi on a good day, the Enerpac proprietary system works on 10K psi. With 10,000 psi you can break things, but the hand pump is a useful compromise.
My experience is that you need the pressure to get the urge.
Season's Greetings one and all
|779 forum posts|
Seals are standard scraper seal and rod seal in rod end bush with muli-part piston assembly comprising of double acting seal and wear rings. One thing omitted is the finishing of the cylinder bore. He welded a boss on which would then necessitate possibly reaming and honing to get the required size and finish.
|Neil Wyatt||22/12/2018 19:10:35|
18777 forum posts
I don't question its a handy bit fo klit but I expected something a bit more exciting from the bearing puller from Hell!
I thought it might be replacing Volvo Penta wheelbearings...
|Clive Foster||22/12/2018 20:01:58|
|2837 forum posts|
Best to stick with the little tommy bar.
Getting over-enthusiastic will cause leak back through the seal at the input end. Reduced volume of oil inside will cut travel and, maybe, reduce force due to air entrapment. That happened to the ram unit on my big puller kit when I loaned it out about 30 years ago. Been meaning to fix it ever since.
Sealey have a service guide for their version, Model number PS990, at **LINK** which should be useful if anyone needs to figure out how to fix one. I imagine all makes are made in about the same way.
Although I made an effective floor standing bottle jack type press about 30 or more years ago I could easily be convinced that a 12 ton ram based kit would be a better fit for folks like us. To the best of my recollection nothing I've done on the big press couldn't also have been done with a 12 ton ram system if suitable plates, joining studs and spacers were available. The big unit is perhaps a little easier to set-up ad hoc with improvised spaces whilst a 12 ton ram system will probably need more specific equipment. It would also generally have to be taken to the job rather than the job taken to it. Which may in fact be an advantage. A 12 ton ram system, along with a few carefully chosen accessories for your particular jobs, would fit in a box or half a drawer rather than taking up space in the workshop. My floor standing press burns up a lot of space for the few times it gets used, Averages out at perhaps 2 or 3 times a year over 30 odd years. But all on jobs I couldn't have done without it. Then.
|Colin Heseltine||22/12/2018 20:37:14|
|613 forum posts|
Many years ago I helped a mate pull a car out of a ditch near me. The car owner worked for Automotech who at that time dealt in Blackhawk automotive body repair gear. For helping him out of trouble he gave me a 10ton hand pump and push ram. I was doing a lot of car repairs at time as a hobby and so got hold of chains and grips and pull rams to use with the same pump for pulling crunched up bodywork apart on cars.
I decided a floor standing hydraulic press would be quite useful and built one up from 3"x4" 'U' channel and utilised the same ram and pump. Still have it now 40 years later and it still gets used occasionally. Recently I managed to source one of the hydraulic wedges to use with the same pump. Handy when want to move a machine away from wall. Few wooden blocks against the wall, put the wedge between machine and wood and pump handle. Job done.
For small pulleys and bearings I also have several of the Sykes Pickavant hydraulic three leg pullers and a couple of plain screw thread pullers.
|John McNamara||23/12/2018 01:06:20|
1314 forum posts
For cheap hydraulic power, the kits sold for panel beaters are worth a look.
|Neil Wyatt||24/12/2018 16:02:35|
18777 forum posts
Once sorted the front crossmember of a mate's Escort using a landrover and a rope
Please login to post a reply.
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.