Good evening all, I have a 310SG that I am experiencing an issue with the parking brake not unlocking and thus the tractor not moving /going into gear. It is equipped with a powershift transmission. I have bought the troubleshooting manual and gone all the way through the process (literally step by step) by the manual to the point of performing the parking brake pressure test and then performing the system pressure tests. Along the way, while systematically testing the electrical side of the tranny, while testing the transmission solenoid diodes, i found two diodes that have been removed from the system and the wires butt connected and then taped up. Upon learning the importance of the diodes to the operation of the solenoids and the protection of the electrical circuitry, I am currently searching for the diode sockets that were cut off of the wiring harness. New wiring harnesses run in the neighborhood of $1400.00 and I am not spending $1400.00 for 2 small connectors. It is my hopes that someone on this blog might know of someone who would have a used engine wiring harness for a 310SG laying around their shop. I would gladly pay something acceptable for the harness and of course the shipping. Thank you for your time. The brewery mechanic
I believe the diodes you are missing are (AT103399 diode connector) the diode looks to just have SAE 2 pin connectors on it. You should easily be able to source these from any online retailer.
Thanks for the reply. The picture of the diode is correct, I have sourced them at my local dealer. However, the picture of the harness connector you provided is not what the tractor has. These connectors have three (3) wires, a positive, a negative, and then a "line" wire going to whatever solenoid is receiving the power. They only come installed in the harness, not as separate items. That is my dilemma Thanks again for the reply
The diode part number #AT103399, is used the following John Deere equipment: John Deere Original Equipment Diode - AT103399,1 Fits the following Crawler Dozer Models: 1050K, 1050K PL, 650J (-159986), 450J (-159986), 550J (-159986), 450K, 550K, 700J-II, 700K, 750J-II, 750K, 755B, 755K, 850J (130886-), 850J-II, 850K, 850L. 850L PL, 950K Fits the following Front Mower Models: 1435, 1445, 636M, 648M, 648R, 652B, 652E, 652M, 652R, 661R, 8400 Fits the following Fairway/Turf System Mower Models: 1550, 1565, 1570 (60, 62, or 72-inch deck), 1575 (60, 62, or 72-inch deck), 1580 (60, 62, or 72-inch deck), 1585 (60, 62, or 72-inch deck), 3235, 3215, 3215A, 3225B, 3225C (-020000), 3235A, 3235B, 3235C (-020000), 3365, 6500A, 7200, 7200A, 7400, 7400A, 7500, 7500A, 7700, 7700A, 8000, 8000A, 8500, 8700, 8700A, 8800, 8800A Fits the following Planter Models: 1700, 1765 (760101-), 1765NT (760101-), 1770NT, 1775 (760101-), 1775NT (760101), 1790, 1795 (760101-) Fits the following Utility Vehicle Models: 2030A GPS (Diesel), 2030A, 3TNE68C, FD620D Fits the following Logger Models: 2054 Fits the following Backhoe Models: 210C (778741-787474), 315D (778741-787513), 300D (778741-787513), 310D (778741-787513), 310C, 310K, 310L, 310L EP, 310SL, 310SL HL, 315SL, 410C, 510C, 610C, 510D, 410D, 410L, 650K, 710B, 710C, 710D, 710J (196271-), 710L Fits the following Loader Models: 210K EP, 210L EP, 2554, 3554 Fits the following Excavator Models: 250GLC, E210, E230LC, E240, E260LC, E400 Fits the following Log Skidder Models: 740E, 748E, 648E, 640E 540E, 548E, 740G, 748G, 640G, 648G, 540G, 548G, 640L, 648L, 848L, 948L Fits the following Articulated Dump Truck Models: 260E, 310E, 370E, 410E, 460E Fits the following Tractor Models: 3025E, 5055E, 5065E, 5075E, 5085E, 5100E, 5100ML, Fits the following Skid-Steer Loader Models: 312GR, 314G, 316GR, 317G, 318E, 318G, 319E, 320E, 320G, 323E, 324E, 324G, 328, 325, 325G, 325SL, 326E (269402-), 330G, 331G, 332, 332G, 333G Fits the following Rotary Mower Models: 3245C Fits the following Compact Utility Tractor Models: 3320 It is my hopes that someone in this forum has replaced one of these wiring harnesses and has the old one laying around in their shop. I only need two (2) items from one of these harnesses, the diode connector that needs to be cut from the old harness, or the complete harness. Thanks again.
Will a three way flat molded connector work on it?
No, internally, the connector is wired to operate the diode. three (3) wires in, but only two (2) posts on the diode.
Is this what you are needing ? Maybe ?
The item number targets just the diodes, not the connector that is attached to the harness. Thanks
Couldn’t you just connect the wires upstream, line and positive, and still get the end result of a diode for suppression?
That, I am not sure of.
Harness repair parts to accept diode # AT103399 is , housing T268460 , Depending on wire size , terminals are . 57M10686 , 57M10687, 57M10689, 57M10690 .
Thank you for sharing those numbers. I will research them