Backhoe Mounted Compactor

denick

I am considering a plate compactor for our backhoe to use in and around our boulder work and other work. I have never used one. Anyone (dayexco) want to give "hoe pack 101" lesson series of the pro's, con's and general knowledge to make a decision.????

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Nick

"Every day I remind myself that my inner and outer life are based on the labors of other men, living and dead, and that I must exert myself in order to give in the same measure as I have received and am still receiving" Albert Einstein

Kgmz

We have a Allied 8700C for our JD 310D.

Allied has updated their models in the last year, and the 8700 has been replaced by the 1000 model. All their new models have more impulse force, and by the specs it looks like it. Our 8700 is rated at 6,400 lbs of force and the 1000 is rated at 8,000 lbs, both at 2,000 cycles per minute.

The newer compactors have a choice of GPM for the hydraulic motors, so make sure your machines flow matches the motor.

Also don't forget the hydraulic kit for your machine. We got our kit from Allied and it was perfect, steel lines running up the boom, all hoses, switches, mounts, etc. The kit installed and painted ran us about $2,200, and also included a valve to vary the flow with 3 positions. We needed the valve so we could run the compactor or our breaker as each has a different flow requirement.


As for problems we have only had a couple. We bought this compactor used at a RB auction. After about a year we had a bearing go bad. It was a easy fix but I somehow missed a roller that was stuck in the grease where to weight rotates. Put the thing back together and fired it up and it promptly got stuck. Tore it apart and found a mark on the weight so knew something was in there and found a roller that fell out of the old bearing. there is a lot of grease in the housing where the weight rotates since that compartment is just a place for the old grease to go when you grease the bearings. The only other problem is with the hose fittings on the hydraulic motor coming loose every once in awhile from the vibration. And again not a big deal just keep a eye on them and tighten when needed.

But once you have a compactor you wonder how you lived without it. Before we bought one we used to rent another backhoe with a compactor when we needed one on a job, this was also before we bought our 928G loader. So now the 928 brings the gravel to bed the pipe and the 310 follows and fills and compacts.

rino1494

We have 2 plate compactors for our backhoes. We are currently doing a 53,000 sq ft building and we have our 580D compacting almost every day. 12" lifts and I am getting around 102%. Our 580D does not have aux hyd, so my dad bought another stick and let out the extendahoe about halfway and welded it fast and we run our compactor off of the extendaoe lines. We recently just picked up a 590 Super M with aux hyd, but haven't mounted it up yet.

Using plates are easy, the only advice is to be careful not to put too much weight on it and stretch the rubbers. They are tough, but can rip.

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dayexco

nick, vibe plates are wonderful on granular, or cohesive soils that are at, or several points above optimum moisture. we use the sheet out of ours....i highly recommend the allied, it's bulletproof. 2 things to look for...make sure hose routing doesn't get caught on stuff, length of your hoses is critical, so they're not too short, or too long so they get caught under plate. another thing....make sure the return line on your hydraulic circuit goes directly back to the tank, not back thru the valve. you want that oil back at atmosphere pressure once it leaves the motor for the plate....otherwise, it'll blow the seals out of your hyd motor. our 690, we had to physically weld a tee into the return line to the tank to bypass the valve bank on the way back....the hyundai, and our case, it's just a matter of opening/closing valves.

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someday, i'll be as patient as Nick.

coopers

Do you have pictures of this 580D? That is interesting...

MALCO.New.York

A 580D....


http://www.csiparts.com/siteart/CSI-Case580D.jpg

Looks a bit like this????




http://tbn0.google.com/images?q=tbn:...2520310A-B.JPG



All the Google Images seem to go here:

http://images.google.com/imgres?imgu...%3Den%26sa%3DG

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coopers

lol, yes I know what a 580D looks like. I know what a hoepac looks like..here's the one I used...but I was curious as to this unique set up of using the extendahoe hyd. etc. to run the hopac.

Attached Thumbnails

 

MALCO.New.York

Hey! I DID NOT know what a 580 nor a compactor looks like.............I do now!!!!!

Between Google and you., I am now Edumicated concerning the look of this Beast!

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Something to One may be Nothing to another!

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rino1494

No, but next time we are at that job, I will take some for you.

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coopers

Oh haha, sorry. Yeah the one I posted is of a 580M. Case's newest models. The D model was built in the 80's. The hoepac on the M is from BTI which our local Deere dealers sell. Here's a few more.

Thanks Rhino.

Attached Thumbnails

     

cexcavation

Can you run a diverter valve on your extend-a-hoe hydraulics. Flip a switch to run the hoe pac, then hit the switch again to go back to running the extend-a-hoe. Seems like the way to go, unless there is something I am missing as far as the construction of the 580D.

LNG24

...

LNG24

oops where the heck is the delete post button.

rino1494

No, because the extendahoe would slide out while compacting. That is why we got a spares extendahoe and let out a little slack and welded it fast. Serves us well. It helped us on sewer job where the depths reached up to 19'.

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cexcavation

The diverter valve should lock out the extendahoe by not allowing any fluid to move in that system. It would be the same as if you let up on the extendahoe valve. Sounds like there is something else going on there. If you simply unhook the lines, then the cylinder would bleed out. The diverter should allow the existing system to work as is until you lock it out and divert the flow to the compactor. Your way works as well, but it seems the diverter would be cheaper and easier for someone else trying to do the same.

tgeb

Just the vibration of the hammer would allow the extendable boom to move around some. (The oil can get past the seals.)

You could set up a system with the diverter valve and maybe some way to pin the dipper in place. a welder with some imagination could work out a way to pin it.

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Tom

www.gebcon.com