cold running TC45D

[snowman64]

Well here is the situation, recently purchased tractor with 240 hrs. serviced everything on 300 hr service and put tractor to work. at 275 hrs the temp gauge started to go to the cold side after tilling for 1 hr, tilled for another hr and gauge was running at the bottom. read forms and found some things to check and none have fixed the issue. ambient temp is 60-85 deg f when this is occuring. checked thermostat bleed off ball,no issue, checked the temp at thermostat housing after 15 minutes 160-170 deg F, ohmed the thermo switch when running and it ranges from 49.7 ohms - 54.6 ohms hot, checked voltage from thermo wire to thermo switch with tractor hot and voltage seemed alittle low (11.1 volts) Also checked main ground wires-ok. Also was told to ground wire from thermo switch to ground and check gauge, gauge went up to normal operating temp. From what I have said,does anyone have any ideas on what else to check?? Another question on the back of main cluster there is a dial pod, anyone have any ideas what this does?
Thanks in advance

Steve

 

[jinman]

With the key off, remove the wire to the temperature probe on the engine and jumper it to ground. Turn on the key and see where the temperature gage goes. It should go all the way to maximum, pegged. If it does not go to the maximum peg, you need to replace the gage. They are around $50.

If your tractor is warming up to 160-170 at the thermostat, the temperature is normal and your gage is toast. You cannot make any adjustments on the instrument panel that I am aware of. My temperature gage had the proper ohm reading according to my Repair Manual, but the gage was bad. I replaced it with a new one and it works great now. Here's a link to the thread.

Replacing Temperature Gage

 

[snowman64]

Thanks Jinman, read the link and that is eaxctly what mind read when grounding the thermo wire. ordered new temp gauge and hope that fixs it.