Hydraulic Attenuator on a 1970- 4520

Josh4520 · Jun 8, 2014

I'm back again. Got the SG Cab on the 4520 and have already used it in the field for planting. I can at least think in the &%$# thing now and it is quieter when I close the door. With that said, I am still getting the chatter off of the main hydraulic supply line (between the trans pump and the pressure regulator). Have any of you ever put a attenuator here? What about a rubber hose? I know some of you on here (Ken11487) are facing this same problem with their 20 series tractors. Any input is appreciated!!

tim s · Jun 9, 2014

When you put the Sound Guard cab on you basically just got the Shelter, to get the quiet part to work out will take a lot more, the pressure regulating valve/priority valve is located in the cowl area of the 4520, and not in the 4430"s this is a major noise source, to deal with this you would need to re-locate that valve down and out of the cab zone,, and then you would plumb the attenuator in to bring the oil "back" into the cowl to feed the steering and brakes, and the use of hoses will help it all too, the pipes add a lot of vibration noise to the mix..

Josh4520 · Jun 10, 2014

Thanks Tim! You don't happen to have a schematic on how this is laid out on a 4430, do you?

Ken11487 · Jun 10, 2014

Yes, that is on my list to do this winter too, but I'm keeping the Hinson cab and cabling new mounts for it.
Plz keep us posted on the project with pics too.
Ken

Hydraulic Attenuator on a 1970- 4520

Josh4520

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tim s

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Josh4520

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Ken11487

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