problem with electrovalve

[brazoayeye]

[solved] problem with electrovalve

Hi, today i was investigating my tractor problem (on hydraulic lifting) and i enabled manually the lift movement (pushing in the front of the eV). I noticed IT was hard to pull but i thought it was so because i didn't use it from month.

When i released the screwdriver i used ti pull the ev stucked enabled. I tried to softly hit it but with no results. I removed the coil and hitted again but nothing happened (when i start the motor the movement try to lift eventi without coil).

Is there a way to fix it or must i look for spare parts? Where can i find it? (I have a bulltra b1 14)

Thanks

 

[North Idaho Wolfman]

#1 Quit hitting it with a hammer, nothing on the outside moves, it all done internally.

Looking at your picture I worry you have a crack in the valve body already.
You'll need to pull the valve body and go through it, most likely it will be a Seal or O-Ring that's bad.

 

[brazoayeye]

I think that the crack is a bad joke done by the flash (shadow), i can't see it in the other photos i did like ones in this thread http://www.orangetractortalks.com/forums/showthread.php?t=23051

I'll check better later.

Can you explain me how to umount the valve? (It's under the diesel tank)

Thanks

 

[brazoayeye]

Relating to this photo:

must i remove B first and pull the valve or must i remove the fuel tank and to look for screw in the upper side?

What is the utility of other valve component?

Thanks

 

[North Idaho Wolfman]

Backing up, before you disassemble the valve.
Have you tested the solenoid for the valve?
Is it getting energized?

 

[brazoayeye]

I removed the coil from the ev (see picture above) so i think the valve must be closed (all mpvements stopped) but when i start the motor the movement lift. (I assume that the coil only enable the lifting and that when the coil is de-energized the valve should automatically return to stop position)

When the motor is stopped i can lower the back arm manually pushing the 3rd eV, when i release it the lowering movements stops.

 

[North Idaho Wolfman]

It would be best if you can get the WSM (Work Shop Manual / Service Manual) it will give you the breakdown of the valve, I'm sorry but I don't have a break down of the electro valve set up, US models don't use them.

 

[brazoayeye]

The Workshop manual seems impossible to have: i can't find it on internet (found in german but i can't read it) but i found a workshop man (WSM) calling where i bought the tractor (they trade used tractor, mainly bulltra and aste series).

So now i know that removing the 4 screws (allen) (called B in the last photo) i can remove the ev without unmounting the diesel tank. The WSM said i have to clean it inside with a fine sandpaper.

 

[North Idaho Wolfman]

I would avoid sandpaper completely when working on valves.
Using scotch bright would be better, but really any abrasive is a bad thing when it comes to valves.

 

[brazoayeye]

i solved, it's easy.

I removed the 4 screw B and unplug the related block. I unscrewed the rounded piece A so i clould separate the cylindrical piece from the squared one. the cylindrical piece has 4 pieces inside, 3 of them can move longitudinally. The spring is located in the squared piece and pull the 3 moving cylinder in the "normal" position.

All OR was Ok but i had rust in the last inside cylinder (the one i pulled to activate the valve) so once pulled the spring can't overcome the friction. I removed internal cylinders pulling from the external "button" and i removed the rust with a very fine sandpaper and now it works perfectly. (i can't reach the internal surface of the external cylinder with a scotch bright)

 

[North Idaho Wolfman]

Excellent to hear you got it!