hyd accumulator

[fish_wisperer]

has anyone ever tried installing a hydrolic accumulator on a tractor? especially with a front end loader.

 

[notamustang]

Having ridden in trucks with juice, aka hydraulics I dont know how there would be any benificial effects in fact detramental events would occur.
The accumulator is designed to act as a spring,(suppling fluid expansion ie compresion) if you ran it up to say 1500# charge on the back end (good luck with that) it might show some benefit on a SCUT but I dont know. Uncontrolled movement of the implaments just does not seem like a good idea, thats why they have float valves. Think about a heavy load in your FEL, your driving along with a full load and you have it low and hit a big bump and the accumulator kicks in and your bucket dumps and you now come to a complete stop and are prying the steering wheel out of your chest.
How were you thinking of using them?

 

[fish_wisperer]

first of all i know very little about tractors, but i work on aircraft so i am familiar with accumulators. i believe these pressure up to 3000 psi and suppliment the system when demand is high. i just thought it would be handy like if you run into a dirt pile let off the gas maybe your bucket would roll faster without throttling up, or if your tractor is parked in the garage and you want to move the loader to get to another greese fitting you wouldnt have to start the engine and fume up the place. i was just curious if anyone ever tried it.

 

[slowzuki]

Kubota in Canada fit almost all the M series with accumulators on the loader boom circuit for carrying round bales. It makes the ride much smoother and lets the laoder spring over bumps.

 

[PineRidge]

<font color="blue"> or if your tractor is parked in the garage and you want to move the loader to get to another greese fitting you wouldnt have to start the engine </font>

Something about the hydraulics being live without the engine running sounds to me like an accident looking for a place to happen. Especially if you have children, you know the ones that like to move all control surfaces out of curiosity.

 

[GATC35]

I have worked with accumulators on commercial jet airliners for 25 years. An accumulator large enough to move you FEL with the engine shut down would be the size of a 55 gal barrel. As previously stated accumulators work with very high "precharge" pressures that can be between 2000 and 3000 psi. I doubt most folks would have the capability to charge such a device. The hoses, fittings, regulators. etc must be special hight pressure units. They are extremely expensive. Also keep in mind a accumulator precharged to 3000 psi is like having a bomb attached to your tractor. The wrong type impact in the wrong place could be a diaster.

I see no advantage to having an accumulator on a SCUT or CUT. Just my .02 cents worth....

 

[fish_wisperer]

yeah it could be kinda dangerous, plus you might need another resivor. of course you could discharge it by going to float position. i think just enough volume to fill fel cylinders one time would be enough, maybe 5 gallons. i might do an experiment one of these days.

 

[Taylortractornut]

I used to run a Samsung Loader for a friends gravel pit when i wasnt running an excavator. It had a diverter valve that put the fluid from the loader into an accumulator for lond sidtance traveling over bumpy terrain like going acroos the yard with a load or around a trench backfilling it where you have to travel a distance. Anyone who has run a large rubber tired loader knows they tend to bounce. This made the machine ride supper smooth at highspeeds. and the bucket 2 feet off the ground. It was only attached to the lift cylinders. It hasd to be disengaged while loading the bucket or in a high duty cycle. ALot of ecvavbors use this as a way to boost digging and lifting capacity to. You have a power button on the top of the right joystick and when needed you push it and for about 10 seconds shes a bad stout mammy jammy. Ive had a little experience messing with hydraulic starters on a friends 2 old Army surplus loaders. They had a hydraulic motor with a bendix on the end that went where the starter originally went. They had a spare tank and a nitrogen powered accumulatr and went to the starter. When you wanted to start it just pull a valve. I think one charger would start it 5 times most days. On real cold ones just hold it till it started. The miliary supposedly had these set up for remote jungle operation where tropical weather might wreak havo on the electrical coonections of a master key and ignition switch. Before you shut it off in the evening you pulled another lever to recharge the accumulator to restart it the next morning. If you didnt you had a 2stage hand pump not fun at all. I fixed a fitting on to the line where I could use his farmtractor to charge the accumulator instead of pumping. The started did a good job when repriming the machine just uncoonect it and hoolk to the tractor to keep it spinning.

 

[fish_wisperer]

that sounds pretty cool.. i was thinking about a full size tractor, not a compact, and really.... charging an accumulator to 1500 pounds is not a big deal and the equitment is about the same stuff as a cutting torch set up. the regulator would cost a little but thats about it. i think if it were set up as a hydrolic assist like on large airplanes, not as a shock absorber, it would greatly improve performance, i think?

 

[gbirky]

Some big rigs have air starters. They use air from the same compressed air tanks that are used for air brakes. All trucks have an engine driven compressor to fill the tanks. If the tanks are depressurized, you can hook up air from the tires to run the starter, you just have to refill the tires once the engine is started and the tanks are pressurized. We use air starters at work to start engines in test rigs.