Hyd Cyl pressure

Anonymous-0

Well-known Member
I have found out that the fitting on the tractor end of your hyd. Cyl. Hose has back pressure on it when there is a load on the cylinder. In other words you will have difficulty plugging the hose in to your tractor remote if the cylinder is holding an implement up, because the ball in the fitting will not move back, presumably due to the pressure of the hydraulic fluid against the fitting.. Once the pressure is off the cylinder (i.e. implement drifts down or otherwise), the ball will retract and the male tip can easily be plugged in to the tractor remote. I had a situation however when the cylinder had no pressure on it whatsoever (was not even attached to anything) and the balls on both fittings would not move and could not be inserted in to the remote. Do I have a defective cylinder? If not, is there any way to relieve the pressure? I have tried to push the fitting tip in by hitting it with a hammer and pushing it against a hard surface to no avail. There was nothing to my knowledge “frozen” in the cylinder as I had just used it the previous day.
 
If they cylinder got warm it could have built up pressure. Have had that happen with my JD swather in the summer. Easiest way to take pressure off would be to loosten coupler, course you may wear some oil
 
Temperature change, as things warm up the pressure builds in the cylinder and hoses.

Unscrew one of the fittings, to allow a little oil out. Yes that will be messy. I try tapping a ball to release pressure; be careful hammering on them, they will leak if you deform the ball even slightly.

Paul
 
Oil has a high expansion factor with heat. So if the cylinder is warmer than when it was unhooked then the balls will have pressure against them.

Solutions to the problem:
1) Loosen a fitting and let the pressure off.

2) Update the female couplers on your tractor to ones that enable you to hook hoses under pressure.

You did not tell us what brand or model of tractor you where using. Then we will know what hose ends you are dealing with. The Pioneer/ISO tips just became a universal standard in the early 1990s. Ford ran their own style of ISO fitting, had square end rather than the ball tye. IH had their own completely different fitting. JD had their own too.

DO NOT beat the hose tip with a hammer. That ball you are seeing is a check ball and has to seal when closed. Damaging it will cause it to leak when not in used. You can push it against some thing steel and not hurt it but don't "beat" on it.
 

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Back
Top