610c tigercat

[Justalogger]

This is still a new to me skidder only have ran it somewhere between 100-200 hours. So finding info in the dash mounted screen I’m still learning… Anyways it’s been fine till yesterday everything works like it should but it will only go about 3-4 mph both forward and in reverse basically seems like the speed control dial is turned all the way down on the turtle the machine has no response when turning the dial from turtle to rabbit. The computer screen shows it’s communicating though as it shows it go from 0-100 as I turn the knob.. now after messing with it some more I found that the drive motor shows 0 rpm at all times.. I’ve never had the cab over but I’m just wondering if someone has experienced this and what I should be looking for. I’m thinking maybe the speed sensor that apparently on top of drive motor. Also it says charge filter 100% does that mean it’s still got 100% life left or is 100% used up and needs replaced thanks

[kiko]

You are correct, there is an issue with with the drive motor speed sensor circuit.  When the xt module does not recieve input from the drive motor speed sensor the machine will stay in the lowest speed .  The original speed sensor will have three wires or  replacement sensor with one wire.  The signal wire will be grounded though two 5.1 ohm resistors to absorb reflections within the frequency  signal. These are resistors are usually located in a power distribution box in the engine compartment.  They will be blue and look similar to a fuse.  Make sure the the terminals are clean for these resistors .  If you have the three wire sensor , you must have system voltage and ground to speed sensor.  Also check the main fuses , look for one marked sensor fuse 

[Justalogger]

Thanks Kiko.. yes I found the blue resistors in the fuse box in engine compartment there was 2 speed sensors resistors in there. I will get a new speed sensor ordered first thing Monday and hope that’s what she needs.. 

[kiko]

It's been a while since I have purchased one of those speed sensors . The three wire sensor used to be about 800 bucks.  In my experience more often than that not it is a wiring issue.  The circuit is easy to check.  Those resistors are wired in series to produce around 10 ohms resistance. The sensor will have a  pig tail, you can unplug that and check the signal  wire to the resistors (yellow wire iirc)ohm and load test.   If you end up replacing the speed sensor gap to tone wheel is critical.  To far away and it won't read, to far in and sensor and drive motor damage can occur.  Acquiring a wiring schematic for your machine would be most helpful.  Tigercats seem to have a lot of wiring issues.

[Justalogger]

Speed sensor it was she’s back up and going. Thanks kiko.. It also already had the new style 2 wire speed sensor it was $239.00 so not to bad…