After re-adjusting a large landscape boulder, I backed up with forks fully curled down, hooked one fork and with a BANG! the black coded aluminum hydraulic line from the SCV to the female coupler ruptured.
With info gotten by surfing GTT, I replaced the line (thank you very much, as getting to the innards was a puzzle).
BUT, when testing the workings of the SCV, I found the raise/lower worked perfectly but the break out/dip function went through one cycle only, then jammed at full curl.
The SCV will not release the pressure in that circuit after engine shut down and all the joysticking I can tolerate.
I have done the following diagnostics/purge exercises;
- Run the tractor around at max throttle while operating power steering, PTO, forward/reverse, all the while putting the SCV through all its functions,
- Cracked the cylinder connections to expel air,
- Connected the red and yellow lines to the black and red (ie. raise/lower lines to curl function and it works)
- Lit a candle to the tractor spirit.
and, no joy.
Does anybody have any info about this SCV, does it have a check or relief valve or hydraulic fuse/weak point that needs attention without having to buy a thousand $CAD SCV replacement ?
Canadians love John Deere tractors too !
Rick, Manitoba, Canada
2016 JD 1025R, FEL, Scraper, Forks, Snowblower, DIY concrete 3 point ballast, heated socks and gloves outlet and enough LEDs to dazzle the moon.