TYM503HTS transmission

   / TYM503HTS transmission #1  

TAZMAN66

New member
Joined
Jul 18, 2024
Messages
1
Tractor
TYM503HST
Question on my 503 tym hydrostat works when first started forward and reverse and then the forward reverse quits. all the other Hydraulics work normal. Last year it was in the shop for 13 months waiting for tym to figure out what the heck was going on with it and supposedly it was a loose fitting on a valve assembly I guess in the transmission but nobody can tell me what it was or where it was.
Found underneath the floor pan access to the front bell housing area there's a dual electronic solenoid valve assembly the magnets are working but don't know if it's bleeding internally or sticking. If you hold the forward pedal or the backward pedal down long enough it'll gradually start creeping and then take off but sometimes you got to shut it off for 15-20 minutes and then start it up and then it might take off and start working and then it'll quit again anybody have any problems or issues like this that may be able to help
 

Attachments

  • IMG_20240717_144410.jpg
    IMG_20240717_144410.jpg
    2 MB · Views: 98
  • IMG_20240717_144342.jpg
    IMG_20240717_144342.jpg
    1.9 MB · Views: 100
  • IMG_20240717_144025.jpg
    IMG_20240717_144025.jpg
    2.1 MB · Views: 105
  • IMG_20240717_143638.jpg
    IMG_20240717_143638.jpg
    2.2 MB · Views: 105
   / TYM503HTS transmission #2  
Did you ever figure it out? Mine seems to loose power when hot and doesn't work if load sensing is on. I change fluids and filters. Does it need to be at high rpms? Any tricks to getting cruise control to work?
 
   / TYM503HTS transmission #3  
Do you have the service/workshop manual?
 

Tractor & Equipment Auctions

1984 ASPT 30ft Pole S/A Towable Trailer (A51692)
1984 ASPT 30ft...
CATERPILLAR 308E2 CR EXCAVATOR (A50458)
CATERPILLAR 308E2...
2010 Ford Edge SE SUV (A51694)
2010 Ford Edge SE...
2016 TRAILSTAR 40FT DUMP TRAILER (A52576)
2016 TRAILSTAR...
2010 Ford Edge SE SUV (A51694)
2010 Ford Edge SE...
2004 PETERBILT 385 (A52472)
2004 PETERBILT 385...
 
Top