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Scammell Pioneer gearbox oil

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  • 3 weeks later...

I spoke to Morris Oils some time ago and they said 50HD was SAE90.

They converted other oils listed on the Pioneer lube chart as follows:

30HD - SAE30 (Engine oil)

C600 - SAE140

I'm totally open to correction on that though, and if it is wrong would like to know before i go filling up all my newly rebuilt drivetrain bits.


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  • 1 month later...

Hi Johnld,

No expert here, but was told not to use modern EP oil in Diff or side casings due to the sulphur content attacking the bronze worm wheel and any other plain bronze bearings. I think the gear box is all roller needle or ball bearings and know of people that say its OK.

Personally, given the mileage and use they get now I just stick to the original straight oils.


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