posted July 11, 2002 10:20               

regards

posted July 11, 2002 11:58            

Just to be on the safe side, is doing this also a good idea when the oil in the gearbox has water in it?

posted July 11, 2002 17:00               

I tried 30 wt and the hydraulics were not near as strong and responsive with 30 wt as with GO-90. I have been told to use no lower than 50 wt in the older Dextas.

Brown is a usual color for old somewhat contaminated Gear Oil.

posted July 11, 2002 17:46               

The oil specifications changed in January 1959 when SAE 20/30 HD was reccomended for ALL Majors and Dextas back to 1952. This is detailed in the Ford issued service letters. This oil will make no difference to the operation of the hydraulics other than speed it up.

If the pump is worn then the hydraulics will not lift as well but this will occur with the heavier gear oils once they warm up.

regards

posted July 11, 2002 19:30               

Ford, like most other companies, published a workshop manual and tractor drivers hand book. However over the years specifications changed and rather than issue a new hand book/workshop manual, they issued supplements that updated the information.

My own Major handbook from 1952 has extra pages added in to correct information. These are just paper typed and stapled into the cover.

As well as the supplements, every dealership recieved things called "Service Letters". These detailed changes to oils, settings etc. but because Ford did not want the general operator to service the tractor, these changes were only published to a restricted few in the dealership and were supposed to be "secret".

This is why sometimes information given in the manual, IT manuals and even Ford's own manual differ. Unless you have access to the "secret" information you will not see the complete picture.

The later models were even more complicated. I have the workshop manuals, the sales manuals and most of the service letters issued for the 6X,6Y and 10 series tractors.

The service letters for this period fill nearly as many folders and this information was never published in the manuals and is not generally available to outside publishers.

This is also why I would never buy IT manuals for Ford Tractors. The information given is not always up to the specifications.

But then I am lucky. Most of my information was handed down in tablets of stone from the "Great God Henry"

regards