1979 JD 850 2wd PTO stopped working....

   / 1979 JD 850 2wd PTO stopped working.... #1  

APEHF

New member
Joined
Oct 30, 2025
Messages
2
Tractor
1978 John Deere utility tractor 2wd 3T80J
I have a 1979 JD 850 2wd with a 3T80J motor. Earlier this year the pto stopped working so I parked it till now. Where do I start so as to establish a diagnosis for this problem? I imagine that I have to remove the seat cover of the back end so as to see what is going on? Is there anything I should be careful of when removing said cover? Thank you!!!
 

Attachments

  • 2025-10-31 12_54_35-Photo - Recents - iCloud Photos - Brave.jpg
    2025-10-31 12_54_35-Photo - Recents - iCloud Photos - Brave.jpg
    252.2 KB · Views: 6
  • 2025-10-31 12_54_55-Photo - Recents - iCloud Photos - Brave.jpg
    2025-10-31 12_54_55-Photo - Recents - iCloud Photos - Brave.jpg
    295.5 KB · Views: 4
  • 2025-10-31 12_57_05-Photo - Recents - iCloud Photos - Brave.jpg
    2025-10-31 12_57_05-Photo - Recents - iCloud Photos - Brave.jpg
    208.6 KB · Views: 4
   / 1979 JD 850 2wd PTO stopped working.... #2  
Welcome to TBN
Tell us more about what "quit working" means pls. Never works or always engaged ??

Assume yours is a two-stage clutch so you have a live PTO. Is that your case ??
 
Last edited:
   / 1979 JD 850 2wd PTO stopped working....
  • Thread Starter
#3  
I have to clutch to put the pto and tramission in gear and when I clutch the pto and transmission stops turning.... And now even when I try to engage the pto it does not turn.... i will recheck my manual to make sure of what I just wrote....
 

Tractor & Equipment Auctions

2018 CHEVROLET SILVERADO CREW CAB TRUCK (A52706)
2018 CHEVROLET...
UNUSED Heavy Duty Ratchet Strap Set (A53117)
UNUSED Heavy Duty...
TICO 510 S/A SPOTTER TRUCK (A54756)
TICO 510 S/A...
2010 Ford Edge SE SUV (A51694)
2010 Ford Edge SE...
2003 Walk-Behind Automatic Seed Spreader (A54811)
2003 Walk-Behind...
WHISPERWATT 220 DIESEL POWERED GENERATOR (A55745)
WHISPERWATT 220...
 
Top