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JD 410C 4x4 the saga continues

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Mae

03-17-2003 15:02:08

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Hi,
We are still having major problems with this hoe.
We can not keep a hydo pump in it. This is the 4th
The first pump had a crooked shaft that broke the pulley causing it to warp the crank...which caused it to jump time... which caused it to put a valve into the piston...which cracked the head. or something to that effect. All these things have been replaced and repaired. Everything is new including the pump mount. The last 3 pumps all have less than 10 hours. The springs have broken in all of them. All of the hoses have been checked...The filters are new and we have run hundreds of gallons of new fluid through this thing. All the pumps are brand new. Does anyone have any ideas? Please

Mae

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John de Marrais

03-22-2003 16:52:36

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Re: JD 410C 4x4 the saga continues in reply to Mae, 03-17-2003 15:02:08

You'll have to excused me since I did not see your first posting. I worked on JD equipment for 40 years but am not current on the latest. Does a 410C still use a closed-center hydraulic sytem with an 8 piston pump for main hydraulics fed low pressure feed oil from the transmission gear pump?
If so, I've never heard of such a thing happening as you describe. In fact, I can't imagine replacing an entire pump when they are usually rebuildable and the internal parts are available (pistons, springs, inlets, and discharge valves). Along the same line, I've seen two machines in my life with bent input shafts in the hydraulic pump, which was caused by internal pump failure. This, however, did not damage the crank pulley or crank. The shock/coupler took all the abuse. I assume your machine has a take-apart two piece drive coupler with four replaceable rubber buffers?

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Mae

03-22-2003 17:48:47

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Re: Re: JD 410C 4x4 the saga continues in reply to John de Marrais, 03-22-2003 16:52:36

Hi,

It has a charge pump on the front of the main pump. The original pump was destroyed when we bought the hoe and was deemed unrebuildable. They did not rebuild these pumps because we bought a New pump not a rebuilt pump. We in fact bought 3 crank pulleys and 3 of the replaceable buffers...which come in one piece before we found out that it was the shaft. My thought is that the shock of breaking 3 pulleys weakened it. We had to eat the cost of all of these...plus all of the other parts. The only reinbursement we received was when their mech busted our cam timing it. We took our hoe into the John Deere shop yesterday. They inspected our machine... found nothing wrong with it.They are blaming it on pump manufacture. They are rebuilding one as we speak until they can get a new one in. They has indicated that they will make sure we have no more down time until they get us a good pump. We spent 12,000 with them in the last 8 months on just this hoe.
Don't get me wrong. We have not asked to be reinbursed. crap happens. Anyone with equipment knows this :>

Mae

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Charlie

03-19-2003 09:59:01

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Re: JD 410C 4x4 the saga continues in reply to Mae, 03-17-2003 15:02:08

I'm not sure the link came through with my last post. Here it is:
http://www.insidersecretstohydraulics.com/

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Charlie

03-19-2003 09:56:56

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Re: JD 410C 4x4 the saga continues in reply to Mae, 03-17-2003 15:02:08

As another source of information, you might try the link below to the inside hydraulics newsletter, and you might be able to convince Brendan that your situation would make a nice case study for one of his monthly articles.

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