I’m trying to diagnose a problem with my travel speed not changing and being jerky when the rpm’s are up. I have the palm version of drzx and I keep getting connection problem. Any advice? Thanks
Looking into your diagnostic connector, pin 1 is top left, pin 2 is top right, pin 3 is bottom left and pin 4 is bottom right. What voltages do you have at each pin. Also check your Pump and Valve controller. Is the green light on top of it flashing once a second?
I will check the voltage in a few hours, lights are flashing red.
Pin 4 is the only one with voltage 4.5 volts
I cannot remember if it is supposed to be green or red. I don't think the color is important at the moment. If they are flashing once a second then PVC should be ok. If it is flashing a random pattern then it is flashing a diagnostic code. Pin 3 should have had approximately 1 volt. Did you check the 1A fuses #4 and #7?
The lights are blinking normally. If I short pin 2&4 it flashes code 26.
Open circuit in the DP sensor circuit (sensor or wiring/connector).
Yes I’ve gone through the checks in the manual and the dp sensor failed, I have one on order. I still can’t connect the drzx palm to the machine. I’ve tried reversing the connection and still no luck.
I purchase a Dr Zx and it would not connect to my 1996 Ex100-2. I ended up downloading the MPDr buying the interface cable and that worked just fine. Good luck!
What’s the part number for the cable?
This is the interface tool number from hitachi /deere 4476512 that will have the four pin plug on it. JD can get you one in a few days. If your close to Corinth you could use mine.
Thanks for the offer. I’m in old orchard beach, I’ll probably just buy one. Thanks again!
I changed the dp sensor not much difference. The travel speed is still jerky when trying to move in anything other then full reverse or forward. There is also a slight hydraulic noise like a relief valve when operating the machine, the hydraulic oil also gets very hot after a while . The machine operates smooth (other then travel) motor doesn’t bog runs fine. Any ideas???
How hot is hot. Was the temperature measured? I would check system relief pressure and propel crossover relief pressure.
I didn’t measure the temperature but it was real hot to touch hydraulic components. I need to get a hydraulic pressure test kit. What size fittings will I need?
Don't know. I have limited information on the 120-2. If you have the manual you should be able to figure it out from that. If you get MPDr you can check some pressures with that.
Where do I get mpdr? The dealer?
PM tool king he will help you out with that
Nope. It is actually a dealer only tool but there are piroted versions out there on the web. See RP's post #9 above.
I bough a 4476512 off ebay and it didnt have anyway to connect to serial port. Is there a cable that i need to connect to computer?
I’ll have to check I thought it plugged right into the usb port but it’s been a bit and it’s at my shop. I’ll check tomorrow and let you know
Will you post a picture of setup you have please.