Help needed with a 12 V wiring diagram for EH winch

[difflock]

I dropped a wee tree(really, it was) on my Krpan EH winch today(my first rusty outing in 2 years is my excuse) 

Anyway I pulled ALL the wires out of the 7 pin  plug/socket where the power supply from the tractor connects to the winch solenoids via the switch.

And I will be buggered if I can suss it out.

I know how to get it to work by touching/connecting the power  directly to the 3 wires that go to the 2 solinoids..

But cannot fathom how to wire the switch to achieve the this effect.

Anybody want to volunteer a wiring schematic.

Thanks in anticipation.

Brilliant days weather here btw.

Gibber, mutter 'n twitch

I just realized where I may have erred, fingers crossed

Edited April 28, 2023 by difflock

[GarethM]

Maybe it's a sign from the wood gods, or our lord and saviour Andreas Stihl to rip out the wired and go wireless?.

[difflock]

Indeed Gareth, and I have long pondered the benefits of wireless operation, since this has been only one of a few mishaps with the trailing wire of the remote.(but  n o t   r e a l l y   helpful😁!)

Though this is the first time I lost how the wires were connected.(And if I go wireless I WILL lose the remote!)

And, while I just finally sorted out a plausible looking wiring diagram and wired it and got it to work without any dead shorts, and it worked, but it does NOT work correctly,

in that ok, it will start winching on the button,

but NOT stop when the winch button is released, OOPS!

requiring the free spool button to be pressed to stop winching, Phew!

AND then the free spool stays "on", even after the button is released, which it should not do.

so an "EITHER/OR" mode of operation. 

Hmmmm  .  .  .

Edited April 28, 2023 by difflock

[GarethM]

I did have a trawl of the internet regarding a wiring diagram, nothing turned up.

 

Can't be overly complicated, as I guess it can't free wheel as default for safety reasons unless you press a button.

 

Is there a control box, as there might be a diagram sticker on the inside of the cover ?.

[GarethM]

Krpan website leaves a lot to be desired, igland isn't any more helpful.

 

Surely they'd want you to have easy access to spares diagrams and such.

 

Failing any other ideas, Jas P Wilson it is Monday morning 🙂

[difflock]

Gareth,

I knew where the paperwork was from when I purchased the winch, the unblemished booklet has oodles of unneeded advice about all kinds of nonsense, but NO wiring diagram.

I searched the internet and Youtube, but all I got was adverts for forestry winches and wiring diagrams for 12V electric winches. The wife had no better luck.

I emailed Jas P's, and unfortunately I did not think to ph them earlier today.

Cheers,

mth

[GarethM]

Ok I know this is random, but this EH model seems similar across most brands.

 

Page 31

 

https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.hud-son.com/wp-content/uploads/2017/10/Gozdarska-vitla-65-85-Hpro_23.4.2012-EN-.pdf&ved=2ahUKEwj1-oXL1s3-AhUGesAKHXTaBeUQFnoECBgQAQ&usg=AOvVaw2sP7dV98-DzTgTGFKkZvYD

 

[difflock]

You are a star Gareth, thank you.

And yes, I had rationalized that the 12V DC  wiring for all  basic EH forestry winches should be identical, or was prepared to gamble on it being so(with the proviso of having a pair of side cutters in my other hand)

Wait out  .  .  .

[difflock]

Well, success to temperance(an ah bin aff the beer for a whole week, so a slight bearing perhaps) and a big thanks to Gareth for that circuit diagram.

BUT 

I still needed to figure the colours of the 3 winch wires and the 3 switch wires.

But since I had established the yellow wire to the winch was "common" to both winch and free-spool, it was only  a 50/50 call re the brake/clutch vis a vis blue/brown, and I had remembered that the ONLY traceable wire that I had found was a short brown  stub to pin 1 on the socket. So I tried that permutation.

Then the switch, well try feeding the positive down the brown, knowing that it gets switched to the blue and the yellow depending on whether winching or free-spooling buttons pressed.

Then temporarily disconnected the positive supply, switched on the ignition and gingerly touched the positive to the chosen pin.

No sparks=GOOD

Then connected it and tried the free spool button, to hear a solinoid click. =O K.

Then the winch button, a subtly different click from probably? the other solinoid, double check, yes def a different click from the other solinoid.

Wired all up and churned the PTO with the  engine stop out, all OK.

I.e. No winching! Phew.

Fired her up with PTO engaged and all worked 100%

I still do NOT understand how the wiring works?

Must be something to do with the diodes in with the solinoids allowing for reversing the polarity without causing a dead short.

Now going to label the circuit diagram with the various wire colours and staple it to the original booklet.

Thanks again Gareth.

Edited April 29, 2023 by difflock

[GarethM]

Always welcome, my internet sleuthing skills do occasionally pay off.

 

In regards to how it works, effectively diodes are used for voltage/arc suppression when turning on/off to avoid blowing bulbs, fuses and electronics etc.

 

However they are using it on the left turn signal, when you E stop it back feeds 12v to the brake diode. Stopping it from working, like putting your finger over a running hosepipe.

 

I am a little surprised they don't do it to the clutch side aswell, but they may have reasons ?.

 

Side questions, what happens when you normally e stop, does it just stop the winch/stall the tractor ?.

Edited April 29, 2023 by GarethM