• Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!

850j return to neutral

R

Robert Rdz

Active Member
Joined
May 16, 2019
Messages
41
Location
Corpus
I have an 850j that keeps telling me to return to neutral then throws the parking brake and TCU code 70.0. SN T0850JX143077 we have replaced the parking brake switch. Crazy thing it is only doing it in the afternoons. Problem started Sunday and has been doing everyday since again only in the afternoons. Any ideas where I can start troubleshooting? Thank you
 
R

Robert Rdz

Active Member
Joined
May 16, 2019
Messages
41
Location
Corpus
Robert Rdz said:
I have an 850j that keeps telling me to return to neutral then throws the parking brake and TCU code 70.0. SN T0850JX143077 we have replaced the parking brake switch. Crazy thing it is only doing it in the afternoons. Problem started Sunday and has been doing everyday since again only in the afternoons. Any ideas where I can start troubleshooting? Thank you
Click to expand...
Also when the code comes out we turn it off and start it right up and the problem goes away
 
mg2361

mg2361

Senior Member
Joined
Jul 5, 2016
Messages
6,816
Location
Pennsylvania
Occupation
Equipment Mechanic
Robert Rdz said:
Crazy thing it is only doing it in the afternoons.
Click to expand...
Yep, by that time of day I want to stop working too:D.

That code indicates an issue with the park lock lever circuit. So I guess start there.

Do you know how to access the service mode in the monitor? Press and hold the menu button for 5 seconds until the word SERVICE MODE appears. Enter diagnostics/live values/switch status. Look for Park Lock Lever. When the issue is occurring, look at the status. You can enter that and leave it up while running to monitor.
 
R

Robert Rdz

Active Member
Joined
May 16, 2019
Messages
41
Location
Corpus
Ok when we get the return to neutral and nothing else I forward depending on the rpm we have pressure of 396 to 414 psi. When we get the return to neutral and park brake and get the check service code we get 3 psi to 14 psi depending on rpm’s.
 

Attachments

  • IMG_0031.jpeg
    5.1 MB · Views: 1
  • IMG_0032.jpeg
    IMG_0032.jpeg
    2.1 MB · Views: 1
R

Robert Rdz

Active Member
Joined
May 16, 2019
Messages
41
Location
Corpus
Robert Rdz said:
Ok when we get the return to neutral and nothing else I forward depending on the rpm we have pressure of 396 to 414 psi. When we get the return to neutral and park brake and get the check service code we get 3 psi to 14 psi depending on rpm’s.
Click to expand...
 

Attachments

  • image.jpg
    image.jpg
    2.3 MB · Views: 1
You must log in or register to reply here.
Top