Michaels Dad
Member
Just installed my [b:0b1cac4923]4th.[/b:0b1cac4923] thermostat in my 640. All have been 160 deg., all from different vendors (I think), last being from this site.
All have done the exact same thing, they open at 190 deg. then the temp drops off bottom of the gauge then starts to creep up.
Thing is the temp [b:0b1cac4923]never[/b:0b1cac4923] reaches 160 deg. again. Even in the Texas summer heat bush hogging it barely reaches 160 deg.
The newest one I put in a couple of weeks ago does the same thing, but it opens at 185 deg. both in a water test (with digital thermometer) and in the tractor. Yesterday it was about 43 deg. out, I was pulling a 7ft. box blade filled to the top with caliche up a grade of 10-15 deg. and temp. only got to 140 deg, then went back to 140 deg. on level ground.
Over the years everything I've owned with a thermostat has gotten to the temp and stayed there which tells me it was cycling. Not with this. Also this new thermostat has a weep hole with a little plastic piece that helps prevent and air pocket.
All have done the exact same thing, they open at 190 deg. then the temp drops off bottom of the gauge then starts to creep up.
Thing is the temp [b:0b1cac4923]never[/b:0b1cac4923] reaches 160 deg. again. Even in the Texas summer heat bush hogging it barely reaches 160 deg.
The newest one I put in a couple of weeks ago does the same thing, but it opens at 185 deg. both in a water test (with digital thermometer) and in the tractor. Yesterday it was about 43 deg. out, I was pulling a 7ft. box blade filled to the top with caliche up a grade of 10-15 deg. and temp. only got to 140 deg, then went back to 140 deg. on level ground.
Over the years everything I've owned with a thermostat has gotten to the temp and stayed there which tells me it was cycling. Not with this. Also this new thermostat has a weep hole with a little plastic piece that helps prevent and air pocket.