John Deere high oil transmission temp

KB6930

Member
Location
Borders
Is there enough engine coolant in it ? The radiator is s funny set up so needs the bottle full to the mark .
Or possibly a temperature sensor wrong or is the backend very hot to touch?
 

Moorlands

Member
Location
West yorkshire
Is there enough engine coolant in it ? The radiator is s funny set up so needs the bottle full to the mark .
Or possibly a temperature sensor wrong or is the backend very hot to touch?
It is still showing bottle although below min! Had a coolant pipe blow earlier under cab so could just be the coolant sorting it’s self out ??
 

KB6930

Member
Location
Borders
I'm sure the bottle is in 2 halves so worth looking in the cap and filling it up if it's low I've had bother with a 69 but can't remember if it was engine or trans caused by slightly low coolant
 

Phil P

Member
Location
North West
It is still showing bottle although below min! Had a coolant pipe blow earlier under cab so could just be the coolant sorting it’s self out ??
Header tank needs to be kept full to the top mark on a 30 series, if it gets slightly below min it can airlock the LTC (low temperature coolant) side of the system which cools the charge cooler and transmission oil cooler.
There’s a bleed screw on the front of the rad below the dust screen, it’s a 10mm alenkey. Back it out until it touches the plastic slide for the dust screen then run the engine above 1200rpm for a couple of minutes to bleed the LTC circuit.
 

Moorlands

Member
Location
West yorkshire
Header tank needs to be kept full to the top mark on a 30 series, if it gets slightly below min it can airlock the LTC (low temperature coolant) side of the system which cools the charge cooler and transmission oil cooler.
There’s a bleed screw on the front of the rad below the dust screen, it’s a 10mm alenkey. Back it out until it touches the plastic slide for the dust screen then run the engine above 1200rpm for a couple of minutes to bleed the LTC circuit.
Thanks for that just doing some other jobs gonna go back to it shortly and top it up. Got a fair bit of work to shift tomorrow so hopefully that’ll sort it.
 

Panzer

Member
Got the same problem with a 6820. Engine temp ok, rear end oil temp light comes on after few hours road work.
 

DrWazzock

Member
Location
Lincolnshire
Too much oil in the transmission system? Level too high? Gears over thrashing the oil and overheating it? Used to happen if 30 series were overfilled, and in fact dipstick had 2 "high levels", lower one for roadwork.
 

Moorlands

Member
Location
West yorkshire
I'm sure the bottle is in 2 halves so worth looking in the cap and filling it up if it's low I've had bother with a 69 but can't remember if it was engine or trans caused by slightly low coolant
Header tank needs to be kept full to the top mark on a 30 series, if it gets slightly below min it can airlock the LTC (low temperature coolant) side of the system which cools the charge cooler and transmission oil cooler.
There’s a bleed screw on the front of the rad below the dust screen, it’s a 10mm alenkey. Back it out until it touches the plastic slide for the dust screen then run the engine above 1200rpm for a couple of minutes to bleed the LTC circuit.
Thanks for your advice lads bled it and brimmed header tank last night and tractor running perfectly today thank go as it’s traded in!
 

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Creamy, untreated and in a glass bottle: Britain gets a taste for old-fashioned milk

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