Mech replaced the seals on stems but the dealer said I should have replaced them . One of those stems is $650 ! Is the stems & coils the only thing that controls the flow for the Aux Hyd ? or is there more inside the control valve ? My machine has 7000 hrs ive spent $5000 since xmas I need to put a budget on the repairs thinking I should just upgrade it as it needs a lot spent on bobtach pins & bushes plus axle bearing on the way out too ? Looking at a Bobcat S!85 2010 witrh 1200 hrs in it on monday , they ok ? Cheers
The stems aren't that expensive, surely. I paid about $100 USD each for PWM ones for an S250, yours can't be much more than that.
The way I understand that they work is they have a tiny spool inside, this allows fluid to move in either end of the main spool inside the control block, sort of like this:
---> ======= <------
The arrows being fluid from the stems and the ====== being the spool that diverts the axu oil in the control block.
If you get some aluminium to use as soft jaws on a vice, grab the part with the Orings in the soft jaws then un-screw the hex part, it should simply un-screw.
Once open, be careful to not loose anything, there are small washers and springs in there. Give it a good wash and blow out, make sure the little spool is free to move in the end that you held in the vice. Give it a good oil up and put back together.
I had an S150 that was sitting for a while before I got it. The bucket opened one way only. I opened the stem and freed the spool and it works perfectly now.