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.????
denick
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Allied has updated their models in the last year, and the 8700 has been replaced by the 1000 model.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.
Allied has updated their models in the last year, and the 8700 has been replaced by the 1000 model.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.
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.
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.
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.
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.
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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