Re: Montgomery Ward with Tiller
From the Gilson S-12 (S-series) book......
"Hydraulic fluid -- Hydraulic pump should be kept filled 2" from the top. If fluid is low, bring up to proper level with SAE 10W engine oil."
And for interest, "Transaxle oil should last for the life of tractor unless leakage occurs. With tractor level, oil should be up to bottom of hole. If oil is required fill with EP 140 SAE oil through level check lug hole." note: this oil is not very easy to find. There is a posting in the Wheel Horse section about a 'replacement' oil or source.
Before you fill up stuff, wait until your specific booklet comes. It may say something different. If it worth doing, do it right.
My Gilson is 'under cover' for a few days. A friend just dropped off two snow/lawn machines in the 'shop'. One is 20 yrs. old, other is 5 yrs. Neither run, but did run, until they blew white smoke and stopped. Engines are still free. The 'shop' just isn't big enough for any more projects. Even if it's just a hobby.