Posted by Majorman on April 27, 2023 at 14:07:11 from (86.134.80.163):
In Reply to: Re: Power Major oils posted by Colin Power Major on April 27, 2023 at 12:44:06:
It is a case of horses for courses. In 1959 Ford changed the oil specifications to 20/30W Universal throughout engine, gearbox and hydraulics. This was to prepare for the Dexta and Super Major hydraulic systems with the new hydraulics which could not cope with the heavier grade well. So 20/30W in the gearbox and rear axle was approved for tractors back to 1952 at that time.
However, I agree with Skipper and still run 80/90W in my gearbox and rear axle/hydraulics in my Major. It reduces the gear noise but the lower grade would be fine, it is just my choice.
The one oil that I do not use is the 15/40 modern engine oil like Rotella. I used it for some years in all my tractor engines, that is Major, Super Major, TE20 Ferguson, Dexta and Nuffield 4/65. All suffered oil leaks and low oil pressure. I spoke to my oil supplier and he told me to change to a 20/50 Diesel engine oil without so many of the modern additives. I did this and my oil leaks stopped on all tractors and my oil pressures improved dramatically. I now use 20/50W in all engines, gearboxes and rear axle/hydraulics on all my tractors other than the Major although that gets it in the engine. I have now done this for the past ten years with very few problems.
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