Lull Shovel Loader hydraulic fluid


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Lull Shovel Loader hydraulic fluid

dieseldave56 I have a 1950 Case DI w/Lull Shovel Loader. Time to do some cylinder seals and change the filter and hydraulic fluid.
Problem is I can not find any information on what was used originially as hydraulic fluid. The previous owner drained and flushed the system with AFT to clean it replaced hoses, ect and filled it with AW32.

Since then the packing gland seals have started to 'weep' when the tractor sits (low psi).
So, long winded me would like to know what originally was used as hydraulic fluid and what viscosity? My guess would be to use AW46 or AW68 if I can get an answer. Opinions?

dieseldave56 Ahh Dave, the 1950 Lull Shovel Loader required an SAE 10 weight motor oil, this is close to the AWH 32 hydraulic oil. You certailnly can try AWH 46 ( similiar to SAE20) or AWH68 ( SAE 30) with out problems I would assume in summer temps where you live. Winter would most likely require draining 2-3 gallos of the hydraulic oil and repalcing it with the same amount of AFT. Kerosine was recommended in my 1950 Case manual but I would NOT put kerosine in.


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