Hyd coupler failure

Doug-Iowa · Nov 13, 2017

My loader on the 1635 would not produce down pressure, but otherwise worked fine. Took it to the dealer and they replaced the quick coupler for the down pressure side of the loader arm cylinders. Seems when the oil flow thru the coupler was at low pressure (arms dropping due to gravity) it would flow fine. But as soon as the bucket touched the ground and pressure increased, the ball would snap shut putting the system into bypass and no flow to the cylinders. No leaks, all internal failure. Mechanic says he sees that happen often, even OEM fittings are sometimes cheaply made. I'd never seen a coupler fail like that before but sure glad it was something simple. Pays to check the simple and cheap stuff first I guess.

pete 23 · Nov 13, 2017

When IH went to the pioneer style couple under pressure couplers, we had so darn much trouble with the couplers it was unreal. I set up a little test coupler in the shop to show people that just because two couplers were hooked together does not mean they will flow oil.

Worst place was on combine headers where flow of oil was always only one way. We took to removing the factory couplers that came with the machine to installing a coupler that when you hooked them together that both balls had to open. Solved the problem when customer was removing and reattaching th e heads.

Hyd coupler failure

Doug-Iowa

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pete 23

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