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Massey Harris & Massey Ferguson Tractors Discussion Forum
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MF 202 with 185 Backhoe Help

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Pappey

01-08-2005 04:42:22




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Just purchased a MF 202 with a MF185 backhoe. It's got a few quirks and I'm working through each of them as I find them.

My question is related to the backhoe hydraulics. While working the backhoe, I have two levers, that seem to release all the pressure in all the cylinders. For example:

I've got pressure on the outriggers (the tractor is off the ground)

I've got the beam and the bucket fully extended

If I pull the lever to curl the bucket, the outriggers lose pressure, both beams drop to the ground while the the whole thing swings to left, and the levers all seem to 'snap' when the pressure is released. If the levers hit my hand it hurts, that's how hard they snap.

The same thing happens if I'm working with the intermediate beam.

This always seems to happen when I am pulling the bucket or pulling in the beam.

After it happens, I can continue working, just put everything back where it was, and continue, but it happens often, probably every 5 running minutes or so.

Any clues as to what causes this or where I should start looking.

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Sam H.

01-08-2005 07:03:28




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 Re: MF 202 with 185 Backhoe Help in reply to Pappey, 01-08-2005 04:42:22  
The problem may be a restricted return line from the valve bank. These original valves seem to be able to shift themselves when there is high flow or backpressure in the return line to the tank. Mine does the same thing with the outriggers but I don't have the same issues with the boom or swing. I assumed my valves were worn and was going to replace them. My 202 has a diverter valve to direct pressure to the loader or the backhoe and eack valve group has its own return.
You should also check if your cylinders are leaking internally since that will make it worse.

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Sam H.

01-08-2005 07:02:07




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 Re: MF 202 with 185 Backhoe Help in reply to Pappey, 01-08-2005 04:42:22  
The problem may be a restricted return line from the valve bank. These original valves seem to be able to shift themselves when there is high flow or backpressure in the return line to the tank. Mine does the same thing with the outriggers but I don't have the same issues with the boom or swing. I assumed my valves were worn and was going to replace them. My 202 has a diverter valve to direct pressure to the loader or the backhoe and eack valve group has its own return.
You should also check if your cylinders are leaking internally since that will make it worse.

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Sam H.

01-08-2005 07:00:53




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 Re: MF 202 with 185 Backhoe Help in reply to Pappey, 01-08-2005 04:42:22  
The problem may be a restricted return line from the valve bank. These original valves seem to be able to shift themselves when there is high flow or backpressure in the return line to the tank. Mine does the same thing with the outriggers but I don't have the same issues with the boom or swing. I assumed my valves were worn and was going to replace them. My 202 has a diverter valve to direct pressure to the loader or the backhoe and eack valve group has its own return.
You should also check if your cylinders are leaking internally since that will make it worse.

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Sam H.

01-08-2005 07:00:50




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 Re: MF 202 with 185 Backhoe Help in reply to Pappey, 01-08-2005 04:42:22  
The problem may be a restricted return line from the valve bank. These original valves seem to be able to shift themselves when there is high flow or backpressure in the return line to the tank. Mine does the same thing with the outriggers but I don't have the same issues with the boom or swing. I assumed my valves were worn and was going to replace them. My 202 has a diverter valve to direct pressure to the loader or the backhoe and eack valve group has its own return.
You should also check if your cylinders are leaking internally since that will make it worse.

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Sam H.

01-08-2005 07:00:45




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 Re: MF 202 with 185 Backhoe Help in reply to Pappey, 01-08-2005 04:42:22  
The problem may be a restricted return line from the valve bank. These original valves seem to be able to shift themselves when there is high flow or backpressure in the return line to the tank. Mine does the same thing with the outriggers but I don't have the same issues with the boom or swing. I assumed my valves were worn and was going to replace them. My 202 has a diverter valve to direct pressure to the loader or the backhoe and eack valve group has its own return.
You should also check if your cylinders are leaking internally since that will make it worse.

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Sam H.

01-08-2005 06:59:52




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 Re: MF 202 with 185 Backhoe Help in reply to Pappey, 01-08-2005 04:42:22  
The problem may be a restricted return line from the valve bank. These original valves seem to be able to shift themselves when there is high flow or backpressure in the return line to the tank. Mine does the same thing with the outriggers but I don't have the same issues with the boom or swing. I assumed my valves were worn and was going to replace them. My 202 has a diverter valve to direct pressure to the loader or the backhoe and eack valve group has its own return.
You should also check if your cylinders are leaking internally since that will make it worse.

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