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aaronac1 
Silver Level
Joined: 07 Jan 2013
Location: Burlington Iowa
Points: 416
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 Topic: 8070 temp sending units
Posted: 15 Apr 2023 at 11:01am |
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Im having trouble with my temp gauge. Ive replaced the gauge and thr sending unit above the ac compressor. Online says there is two. I dont see thr other. Im assuming that the second one is bad and thats why its not working. Any help is appreciated
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Wd-45 D-17s4 170 185 190xt 7045 8070
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ryan(IN)
Orange Level
Joined: 11 Sep 2009
Location: Bluffton,IN
Points: 790
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Posted: 15 Apr 2023 at 11:27am |
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There is only one sender for the temp gauge. I don’t trust those factory gauges and always put another temp gauge in.
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ryan
1984 8070 FWA,1979 7060,1975 7040,1971 190,1960 D-17D,1957 D-14, 196? D-19G, 1975 5040,1971? 160,1994 R62
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captaindana
Orange Level
Joined: 14 Sep 2009
Location: Fort Plain, NY
Points: 2580
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Posted: 15 Apr 2023 at 5:48pm |
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Yup I put in two in each tractor also.
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Blue Skies and Tail Winds
Dana
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Gleanermanl2
Bronze Level
Joined: 29 Sep 2013
Location: Kansas
Points: 21
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Posted: 15 Apr 2023 at 6:53pm |
Have you tested the wire to the sender? Power to the gauge? Why do you say it doesnt work? If you turn the key on and ground the single wire that runs to the sender the gauge should peg the guage. Remove the wire from grounding and it should drop to cold. If it doesnt do that. test power to the guage. there should be 12 volts to one of the wires on the back. If there is 12 volts. ohm the sender wire. if all this checks out replace the sender. there is only one at the thermostat housing. (you can ohm the sender as well i just cant remember what the resistence is suppose to be at room temp) lastly the thermostats might be stuck open. i had a single thermostat stuck open and my temp gauge didnt come up at all.
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Unit3
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Joined: 17 Oct 2009
Location: NC Iowa
Points: 5609
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Posted: 15 Apr 2023 at 8:00pm |
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When you turn the key the new temp gauge goes into the red and beyond. I have the same problem. Bought 2 new temp gauges. Also bought new senders for an 8070. My guy tells me that the new ones put out 11 volts to the sender and factory put out 5. They don’t have the right sender/gauge combo, yet.
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2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C
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Gleanermanl2
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Joined: 29 Sep 2013
Location: Kansas
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Posted: 15 Apr 2023 at 8:30pm |
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Guages dont put out any voltage to the sender as far as I understand it. The sender is just a varying resistance to ground depending on the temp of the engine. it completes the circuit through the sender.
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Gleanermanl2
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Joined: 29 Sep 2013
Location: Kansas
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Posted: 15 Apr 2023 at 8:31pm |
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now i do know different guages use difference resistance sweep ranges to read accuratly. the range has to match the range the gauge will read. maybe thats what they meant.
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aaronac1
Silver Level
Joined: 07 Jan 2013
Location: Burlington Iowa
Points: 416
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Posted: 15 Apr 2023 at 10:11pm |
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It ended up being a ground issue. I i made a jumper wire to for the gauge to go from the fuel gauge side to the temp side. All is right in the world
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Wd-45 D-17s4 170 185 190xt 7045 8070
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