Temperature mystery

[SteveB]

Here's another view, which shows the other side of the coil.

Strange it should go wrong after 60 odd years of reliable service.

[John b]

Interesting read
https://mossmotoring.com/lab-coat-lessons/

[Billy26F5]

I agree, but there are so many mysteries like that!
Superb find John! Now we know how to fix them, the only hurdle is getting diethyl ether! Now to try for luck on ebay and get a gauge for Billy (not very much there at the moment). I would still prefer a complete one but it's not essential.
Sandy

[Billy26F5]

I know it's a long time, but you're probably looking at a 954E, the Mk1 industrial tractor engine. It and the 562E were replaced with the 592E from April 57, when the R prefix was replaced with the S prefix. On a different note, the Bourdon tubes in the oil pressure and temp gauges are identical, just in case someone wants to fix one the hard way. All you need to know for that is here:

Interesting read
https://mossmotoring.com/lab-coat-lessons/

Sandy

[Billy26F5]

Apologies all, I'd forgotten I bought many years ago a copy of the service manual for the 'industrial engine', which includes the 592E. I've dug it out but it may not answer exactly which thermostat I have as it's for 'engines built from January 1st 1960 (engine number S.174500 onwards)'.

I think I suggested this before but I'll say it again in case anyone has an Industrial repair manual: please send Henk a scan, it's a manual lots of Major owners will appreciate. In particular tractors using a 590E or 592E. 589E and 591E petrol engines are also covered in case you happen to have one. I'm hoping to provide stuff on lorries, and hopefully tractor service letters too.
Sandy