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NH hydraulic pump coupler failure

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Join Date: Jan 2011
Posts: 5 Epping, NH
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2011-01-15          176423

Of all the NH TN70DA tractors built hasn't anyone had the coupler for the hydraulic pump break? NH has a bulletin regarding the bearing on the coupler being too tight or the end play on the hydraulic pump being too tight causing the pump to overheat BUT they insist the failure is caused by operator error. They claim that excessive "dead heading" of the hydraulic system can overheat the fluid causing the pump or coupler to fail. Is that a bunch of hooey or what?

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