hydraulic valve problem?

[Breezeblock]

If I am following this, you have replaced a busted valve with a repaired valve and now it wont work????

 

Buy a new valve, it will be better than the alternative which is wasting time messing with a busted valve. Welding valves back together is a new one on me.

 

if its an alloy bodied valve I would try and get a steel bodied replacement as I think alloy valves in general are only rated to 200bar welding valves is a recipe for trouble is every thing else in the system ok as it takes a lot to bust a valve I would look at the design of the system if it is doing this regular too many pressure spikes possibly

[dig-dug-dan]

Its more of a porting block, than a valve. Oil flows through it normally when the crusher jaw is not operating, when it it, a diverter, or electromagnetic switch, moves oil within this port.

it had a tiny split about 5mm in length on the side, which allowed oil to escape whenever the ram changed direction. It was this split that was welded up.

if it was this porting block at fault, seems strange I can get fast tracking speed, as the oil is obviously flowing throguh the porting block ok. Once back at work, I will try and bridge the in and out pipes from this porting block and see if that alters anything

[dig-dug-dan]

If I am following this, you have replaced a busted valve with a repaired valve and now it wont work????

 

Buy a new valve, it will be better than the alternative which is wasting time messing with a busted valve. Welding valves back together is a new one on me.

 

Have ordered a new valve. Its only made for this manufacturer and no one else, they wont deal with me direct, and its £350 plus vat

[dig-dug-dan]

 

this is the porting block. The black mark is where the split was. Looking at the photo, oil in is top hole, next two are the crusher ram, the last one is oil out. When the crusher is not working the oil flows through the system as normal, via the track lever ports. The hole to the right of the crack is the presure relief valve.

[Breezeblock]

is there any hydraulic diagrams in the literature for your machine or a makers name part no on the block

[dig-dug-dan]

Yes. Phoned them and emailed. They told me its only available through my machine manufacturer, and wont deal with me. Other local hydraulic places have said its a specialist lart and cannot source it!

have ordered a new one, but I am not convinced my problem lies with it

[dig-dug-dan]

Put the old block on today, made no difference. Tried amnew pressure relief valve, no joy. Ot must be up at the lever end ! TIME FOR AN EXPERT TO LOOK NOW,!

[Breezeblock]

have you stuck a pressure gauge on the machine yet do the other functions on it work ok

[dig-dug-dan]

No, I dont have one. Are they expensive? Tried a big lump of concrete in the jaw, and it pulverised it no worries, tracked it round the yard in high speed no problems. Conveyor works fine. Strange

[Breezeblock]

I have had a look at tcp website and there are service manuals on there have a look at them guages are not that expensive any hydraulic supplier should be able to sort you out it looks like minimess fittings for the test points take one with you