alswagg 128 #1 Posted June 2, 2014 On the D 180 we just bought, there is a Hydraulic Junction box. This is located on the left side Directly above the Hydraulic drive motor. Two hosed go into the box, from the drive motor. The parts tractor i have also has this box. I don't recal the box or unit being on our D18 auto. I did not find anything on it in my owners manual for the D18 auto. Does anyone know what this is for and what does it do? Thanks Al Note, I found another on Ebay from a D200??? Share this post Link to post Share on other sites
gwest_ca-(File Mod) 10,478 #2 Posted June 2, 2014 Maybe this is it Garry Share this post Link to post Share on other sites
alswagg 128 #3 Posted June 2, 2014 Yes that is it. What is it for? A relief valve. Must have been an update for the 73 18 auto. Share this post Link to post Share on other sites
Trouty56 565 #4 Posted June 2, 2014 It is to absorb some of the stress on the hydro system.....don't know it really works though....my 180 does not have one....possibly a sales gimmick imho..... Share this post Link to post Share on other sites
coldone 35 #5 Posted June 2, 2014 Its a buffer valve. Its to help releve some of the stress on the transaxle with quick direction changes. Share this post Link to post Share on other sites
pfrederi 17,116 #6 Posted June 2, 2014 Early D's did not have it. Then they added them as coldone indicated to reduce stress. However they dropped them for later models...you have to think cost as factor at the end. I have one for may D200 but haven't gotten around to installing it. Just do not go from fwd to rev too fast and you should not have any problem. Share this post Link to post Share on other sites
