I recently ran into a problem where my left speed sensor wouldn’t read rpm’s. I swapped sensors and the problem followed the sensor. I’ve always noticed when you put the dozer in forward or reverse it would always track faster on the left side.I replaced the sensor with a new Deere part. After replacing the sensor it was back to running and it read the rpm’s but still had the problem with it tracking a touch faster when you put it in forward. I’ve ran it with the new sensor for roughly 15 hours. Today I decided to calibrate the transmission controller. I had several issues through the first step but was able to get past that. I’m now getting 2 codes from the controller which are F3A7 F3E6. I’m away from my manuals and I need to try to get this running by Monday. It won’t move at all now. Can anyone point me in the right direction? I did this with the fluid at 150 degrees. Also the serial # is 148104.
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450j Deere won’t calibrate
- Thread starter Blake G
- Start date
mg2361
Senior Member
F3A7 - Left Forward Pump Threshold Calibration too High
F3E6 - Left Reverse Pump threshold Calibration too Low
First thing I would try since it is failing the calibration at that point is to perform a Null Adjustment on that pump.
F3E6 - Left Reverse Pump threshold Calibration too Low
First thing I would try since it is failing the calibration at that point is to perform a Null Adjustment on that pump.
Do you have a procedure of how to do that? I have very little experience with these dozers
Disregard I finally got access to a test manual plan on getting the stuff tomorrow to be able to get gauges on it. Do you happen to know what thread the plug is that you have to remove to put gauges in is?
mg2361
Senior Member
Check your PM.
Thanks for your help! I ended up doing a null adjustment on the left side pump. I then went back through the calibration procedure and it was able to move on its own. I then took it outside of my shop and calibrated it under its own power ( not on jacks ) and its never tracked this good before!!
landonjanes
New Member
Looking for info on how to complete null adjustment referenced above
mg2361
Senior Member
Welcome to HEF landonjanes
!
Check your messages.
!Check your messages.
mg2361
Senior Member
The Null adjustment would be here:
