Had an interesting incident with Yet Another Quality New Holland Product this week. 1116 swather. Jumped the header up/down when going over a wheel track. Header drops pretty hard and blows out a steel compression-fitting T joint in the header up/down hydraulic circuit. There is a pressure relief valve (factory adjusted) on the circuit, but it appears to me that it is a silly non-solution to the problem of a header drop spiking the pressure in the circuit, because the hydraulic pump output is on the other side of the pressure relief valve. Doesn't seem like there is a whole lot of chance of shock-induced pressure getting an escape out that path. So I'm thinking about plumbing a hydraulic accumulator into the circuit. Never having done this, three questions: 1. Will this help the situation I describe? I'm guessing y'all running combines and swathers must have seen this situation before. 2. What is involved in installing an accumulator? Is this just a bolt-on into the circuit, or is there something I'm missing? 3. How big a unit and what type should be used in this type of application? On the 1116, the header raise rams are about 1.5" in diameter and they're single-acting rams.
Edited by NVDave 7/12/2006 15:04
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