Hydraulic pipes

[DanL99]

The clue was 'I just put them in' I have limited experience of air brake couplings, but just popping the connectors in is not heavily featured in that limited experience

Sorry, Not sure what you mean? I pull back on the front of the connector then let it forward once I've put it in, then to get them out I pull back on the front and pull it out

 

[pine_guy]

Sorry, Not sure what you mean? I pull back on the front of the connector then let it forward once I've put it in, then to get them out I pull back on the front and pull it out

Sorry, that was a sarcastic remark RE air brake couplings which can be a pig to use sometimes, or at least in my limited experience of them. What you doing to couple the hydraulic ones is spot on.

 

[Pheasant Surprise]

Yeah, I've heard a lot of people talking about 'float' so much so that I don't like to ask because I'm guessing it's something I should know if I've been driving them over the past summer, what is it?I've been taught weird really

Float is when you take the pressure out of the circuit, so for instance you can then couple or uncouple the pipes.

Different tractors have different ways of putting the spools into float, so you will need to ask again how it's done, for X tractor.

Just be mindful of what state/position an implement is in when you put its hydraulics into float. You don't necessarily want it crashing to earth in a hurry!

 

[Robigus]

Yeah, that's something I gathered quickly as I was watching them, I used to hook trailers up but never but the link arms back to 90% in the summer as I wasn't told that at work just shown how to use the pickup hitch, I was told by the tutor about the link arms as I went to take the spreader to field he stopped me and told me about the lifting them up to stop it hitting when turning, thanks anyway

If you knew it all you wouldn't need to be at college - never be too embarrassed to ask, that is why you are there and that is what your lecturers are for. I'll let you into a secret - when you finish college you won't know it all either, you will keep learning every day you are working.

Spool levers and float. The lever will, unless it is a very old tractor, control two couplings. You push the lever forwards or backwards and when you let go it springs back to the middle.

For single acting, eg tipping a trailer, you plug in one pipe and when you move the lever it moves the ram in one direction. You move the lever in the opposite direction and it allows the oil back out under its own pressure.

Double acting, eg folding up a piece of machinery, you use two pipes and you can push and pull the ram in both directions.

Float is when the valve is left open so that unpressurised oil can move freely backwards and forwards. Not all valves have this but when they do you normally push the lever to one end where it will lock in so that you don't need to keep your hand on it . One situation where I would use this is with a big set of hydraulic folding rolls. You unfold them using the rams as double acting and then push the levers into float for work. This allows the roll sections to move independently by removing the oil pressure. Personally I would not lower a big trailer by putting it into float as you would have little control over it.

That is just a basic description and there are of course plenty of variations.

 

[NiallOrm94]

I live by this quote

 

[DanL99]

If you knew it all you wouldn't need to be at college - never be too embarrassed to ask, that is why you are there and that is what your lecturers are for. I'll let you into a secret - when you finish college you won't know it all either, you will keep learning every day you are working.

Spool levers and float. The lever will, unless it is a very old tractor, control two couplings. You push the lever forwards or backwards and when you let go it springs back to the middle.

For single acting, eg tipping a trailer, you plug in one pipe and when you move the lever it moves the ram in one direction. You move the lever in the opposite direction and it allows the oil back out under its own pressure.

Double acting, eg folding up a piece of machinery, you use two pipes and you can push and pull the ram in both directions.

Float is when the valve is left open so that unpressurised oil can move freely backwards and forwards. Not all valves have this but when they do you normally push the lever to one end where it will lock in so that you don't need to keep your hand on it . One situation where I would use this is with a big set of hydraulic folding rolls. You unfold them using the rams as double acting and then push the levers into float for work. This allows the roll sections to move independently by removing the oil pressure. Personally I would not lower a big trailer by putting it into float as you would have little control over it.

That is just a basic description and there are of course plenty of variations.

Thanks a lot, very helpful.