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#1
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Shop Press for Bushings: Adapters?
I am considering purchase of the following 12-ton, "Central
Hydraulics" A-frame, shop press for removing old control arm bushings and pressing new ones in place. http://www.harborfreight.com/cpi/cta...temnumber=1667 I see people use socket wrenches, sometimes nuts and bolts, sometimes a bit of pipe to adapt to the particular control arm (say) and push out the old bushing (or push in the new). Can anyone who has done this share any other wisdom, including safety precautions? Of course I will study the manual like mad. Having just my one set of wheels, for $80 I think I'd like to try to do this myself. |
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#2
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Shop Press for Bushings: Adapters?
Elle wrote: > I am considering purchase of the following 12-ton, "Central > Hydraulics" A-frame, shop press for removing old control arm > bushings and pressing new ones in place. > > http://www.harborfreight.com/cpi/cta...temnumber=1667 > > I see people use socket wrenches, sometimes nuts and bolts, > sometimes a bit of pipe to adapt to the particular control > arm (say) and push out the old bushing (or push in the new). > > Can anyone who has done this share any other wisdom, > including safety precautions? > > Of course I will study the manual like mad. > > Having just my one set of wheels, for $80 I think I'd like > to try to do this myself. Most control arm bushings really don't require a whole lot of force to press in/out, large sockets and/or well chosen pieces of steel pipe will work fine. the key is whenever pressing, to never bend the "ears" that the bushings are pressed into; i.e. when pressing the bushings in, cut yourself a piece of pipe, angle iron, whatever so that the ears are held their exact original distance from each other. Rather than use a press to remove the old bushings, I usually walk them out with an air hammer and dull chisel. Usually works fine although sometimes they fight you and need to be mangled a little bit. I've done this on quite a few old Studebakers (the rubber bushings seem to disintegrate if you look at them funny) with no problems; other cars with short/long arm front suspension ought to be similar. I know the upper control arms on an old A-body MoPar look very, very similar. good luck, nate |
#3
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Shop Press for Bushings: Adapters?
In article . net>,
"Elle" > wrote: > I am considering purchase of the following 12-ton, "Central > Hydraulics" A-frame, shop press for removing old control arm > bushings and pressing new ones in place. > > http://www.harborfreight.com/cpi/cta...temnumber=1667 > > I see people use socket wrenches, sometimes nuts and bolts, > sometimes a bit of pipe to adapt to the particular control > arm (say) and push out the old bushing (or push in the new). > > Can anyone who has done this share any other wisdom, > including safety precautions? > > Of course I will study the manual like mad. > > Having just my one set of wheels, for $80 I think I'd like > to try to do this myself. > > A 12 ton may not be enough - Dunno what you're working on, but the factory manual on my ride tells me that I need to be using an absolute minimum of a 20 ton press, and recommends a 30, for doing ball joints, and that if they seat with less than 14 tons of pressure, the control arm is stretched excessively and needs to be replaced. As far as "adapters", well... Speaking from a purely "seat of the pants" perspective, pick something seriously stout. I ended up using the input-shaft bearing out of an old caterpillar transmission when I did mine - Diameter was about perfect, catching the "lip" on the ball joint and letting me mash it as hard as I cared to without crushing the bottom of the ball joint. (Force was all on the inner race - I wouldn't even *TRY* using it for something that needed to mash something the outer race was sitting on) Anything "lightweight" stands a very real chance of "exploding" under the pressure and showering you with shrapnel, so a *HEAVY* blanket or quilt over the whole thing when actually doing the press isn't a bad idea if you've got any doubts - The blanket may not completely stop anything that "escapes", but it should slow it down enough that instead of needing a surgeon to dig it out, you only need to ice a bruise. -- Don Bruder - - If your "From:" address isn't on my whitelist, or the subject of the message doesn't contain the exact text "PopperAndShadow" somewhere, any message sent to this address will go in the garbage without my ever knowing it arrived. Sorry... <http://www.sonic.net/~dakidd> for more info |
#4
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Shop Press for Bushings: Adapters?
Don Bruder wrote: > minimum of a 20 ton press, and recommends a 30, for doing ball joints, > and that if they seat with less than 14 tons of pressure, the control > arm is stretched excessively and needs to be replaced. I remember the good ol' days, when the spring pressure pulled the ball joints into the control arm... Dave |
#5
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Shop Press for Bushings: Adapters?
"Don Bruder" > wrote
> "Elle" > wrote: >> I am considering purchase of the following 12-ton, >> "Central >> Hydraulics" A-frame, shop press for removing old control >> arm >> bushings and pressing new ones in place. >> >> http://www.harborfreight.com/cpi/cta...temnumber=1667 >> >> I see people use socket wrenches, sometimes nuts and >> bolts, >> sometimes a bit of pipe to adapt to the particular >> control >> arm (say) and push out the old bushing (or push in the >> new). >> >> Can anyone who has done this share any other wisdom, >> including safety precautions? >> >> Of course I will study the manual like mad. >> >> Having just my one set of wheels, for $80 I think I'd >> like >> to try to do this myself. >> >> > > A 12 ton may not be enough - Dunno what you're working on, It's a 91 Civic Sedan that's seen several years of northern winters. Some of the bushings are horrendous looking. Ride seems okay, but ya know the degradation undoubtedly has been slow but sure. Folks tell me I'll see a difference. Plus the dr. side is lower by about 3/4-inch. I'm troubleshooting that and so far have removed the coil/damper assemblies in the front in their entirety and couldn't find anything wrong with them. I suspect the bushings are over compressed on one side. I will be doing more inspecting in the next few days, under load and not under load. If I actually go at the bushings, it will be a multi-week project. 'Cause I need a ball joint separator, gotta buy the bushings, etc. I think I could potentially take this car to 300k miles if I can get the suspension (especially bushings and maybe ball joints) in better shape. It has 175k on it now. I stay well on top of engine maintenance, and the engine runs well. 40 mpg most of the year. Been talking about working on the bushings for a couple years now. Did some major work on the dr. side rear 1.5 years ago. Hellacious. But I'm better prepared now. I sure appreciate the input, Don and Nate. All you're saying goes into my notes. |
#6
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Shop Press for Bushings: Adapters?
In article
. net>, "Elle" > wrote: > I am considering purchase of the following 12-ton, "Central > Hydraulics" A-frame, shop press for removing old control arm > bushings and pressing new ones in place. Varies by application but; The shop press is pretty much a waste of time for removing suspension bushings. Much easier and faster to burn the rubber out with a propane or whirlwind torch and then drive the bushing shell out with an air chisel. The press works fine for installation. > http://www.harborfreight.com/cpi/cta...temnumber=1667 > > I see people use socket wrenches, sometimes nuts and bolts, > sometimes a bit of pipe to adapt to the particular control > arm (say) and push out the old bushing (or push in the new). If it's round and scrap, I collect it. Pipe, bearing races, bushings and as mentioned, sockets all work as press drivers. > Can anyone who has done this share any other wisdom, > including safety precautions? Be careful if it's a stamped control arm, you don't want the control arm to collapse when you're driving the bushing in or out. You can cut half rounds of exhaust pipe of the appropriate size and use as a support in the hollow part of the control arm to keep it from collapsing. Make sure that everything is straight and true, if the bushing cocks going in, it's gonna ooogle out the hole in the control arm, work slow and deliberate. Think about the operation as it's going to be performed, consider what *might* happen when you force this piece into that piece. The other thing to consider is; whether the parts you're working on will actually fit square in the press bed, odd-ball shaped pieces like control arms don't always fit in there the way you'd like them to, that is why many bushing installation tools are simple threaded screw type tools. > Of course I will study the manual like mad. > > Having just my one set of wheels, for $80 I think I'd like > to try to do this myself. Good luck! Oh, one other thing... A sheet of 1/4" Masonite (tempered hardboard) makes good body armor. When in doubt and you think there's a chance of parts flying, hold or prop a piece of Masonite between you and the parts being pressed. |
#7
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Shop Press for Bushings: Adapters?
Much oblighed, aarcuda, especially the safety tip.
Dave, fortunately I did take one automotive suspension class and saw the weight of the car used to separate the ball joints (helped by a few hammer blows), and then I think spring force was used to join them again. Sure helps to have seen this once. "aarcuda69062" > wrote snip for brevity; all comments noted > A sheet of 1/4" Masonite (tempered hardboard) makes good > body > armor. > When in doubt and you think there's a chance of parts > flying, > hold or prop a piece of Masonite between you and the parts > being > pressed. |
#8
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Update Shop Press for Bushings: Adapters?
http://home.earthlink.net/~honda.lioness/id15.html describes
the approach I used, with success, to remove the bushings from my 91 Honda Civic's front lower control arms. It is a combination of hints from here and elsewhere. I developed this approach over the last four days, using the larger bushing on an old, bent control arm for practice. Today, using this new approach, I was able to remove the smaller bushing in bout an hour. It required very little labor. The remaining question is whether I can now slip the new bushings into place without a shop press. |
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