jd 410 back hoe reverser

jim_uny

Member
no forward or reverse. checked hy oil level, changed transmission & hydraulic filter. have full hydraulics. waiting for 1/4 npt female to 3/8-24 o.ring fitting to test reverser psi. sb 160 lbs psi. added a shim no difference. has anyone taken out pressure regulator valve ? i dont have small long needle nose to get in there to see if stuck. also manual says to check tran filter by pass valve. if not those then clutch pack or tran pump. anyone ever replace tran pump ? how hard ? thanks
 
Make sure the inching pedal is returning all the way up and is operating the valve. I worked on one years ago that a roll pin in the inching pedal linkage broke, the pedal would come up but the valve was being held down.
 
Check all the linkages to make sure every thing is moving as it should. When mine did that, it was a nearly invisible pin that had backed out of the linkage on the back side of the reversing valve.
The inching pedal, the first part of the clutch pedal stroke is a hydraulic release. The bottom part of the stroke is a mechanical release. A light touch of the pedal is usually all that is ever needed.
Scott
 
jd serice man calls foot clutch control valve. disengage for cold weather starts. not for all hydraulics just transmission reverse shifter control valve. will check out.
 
scott_s and msm i owe you one. roll pin was completely out. added and works aok. thanks again. that aint in service manual. never would have figured it out.
 

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