I came across this previous thread recommending changing the oil in the governor every time you change the oil in the engine, any further advice on these matters would be appreciated. I have a 1959 Dexta; is that the type of governor that needs the oil changed in it?
Having recently cleaned the air breathing filter on my governor and noticing the huge difference it made to the running of the engine in terms of smoothness, especially at lower revs, I'm now pondering how much better it might run if I changed the oil as well?
A drawing of the governor can be found on Section 4 "Fuel System" Page six of the Fordson Dexta workshop manual (66/100 pdf) ,showing the location of the air filter. It is a wire mesh filter and is quite a tight fit and needs a good tug to get it out of the housing for cleaning.
Here is a YouTube link, showing the location of the air breather filter on the governor. https://www.youtube.com/watch?v=H3eo785qRjM
https://www.fordsontractorpages.nl/ubb/ ... 00332.html
You have to change the oil every time you change the oil in the engine. The filler is the large 15/16th plug on the front/top of the governor housing, the level is a 1/2"spanner size on the side of the governor and the drain is a 1/2"af spanner size underneath the housing,(or could be immediately beneath the level plug depending on pump).
The governor itself is a system of weights, spinning round and using inertia to control through linkage, the position of the fuel pump rack.
The oil in the governor housing is only to lubricate this weight system. Diesel from the main pump is allowed to leak into the housing diluting the oil. The oil level will build up due to this and slow the action of the weights. When the tractor was a working tool, the oil level had to be checked weekly to keep the level down. Some pumps leak more than others so don't worry if the level rises quickly or doesn't rise at all as long as there is oil/diesel in the housing.
When changing the oil the governor holds about 1/3rd British pint(sorry have not worked out metric equivalent). The pump should be filled until oil runs out of the level plug, then allowed to stand until oil stops running out. This is then correct.
This information also applies to the mechanically governed Super Majors.
regards
Brian