TEF 20 oil

[Elliottractors]

Hello
I wonder If anyone can help. Iv recently acquired a TEF20 with aviation cab and banana loader, bit of a barn find that’s been sitting for 15 years and I’m wanting to do a full service on it but I can’t seem to find much info on what engine oil to use and what gear oil to use. Iv got the original service manual but I can’t find anything about oil type only about the ‘fill up data’. What is my best option for engine oil and gear oil? Thanks

[Fergiefarming87]

Hi,
Most important is to use a good quality old fashioned mineral oil with no modern detergents in it which can damage an old engine. I use 20w 50 in the engine ( I'm using Castrol at moment but brand down to personal preference) and 15w 40 in back end. I have just found this works well for me as the 20w 50 is a fairly thick oil providing good viscosity at high temperatures keeping the oil pressure good when warmed up and working

[Fergiefarming87]

Engine is about 6.8L to fill back end around 22L from memory, plus you will need a drop of oil for the oil bath air cleaner