I'm working on a Warner Swasey 4436. I packed several cylinder. I fill up to fill cap but hydraulic fluid did not show in sight glass and after running the system was full of air. Removed covers from hydraulic tank and drain fluid and refill hydraulic tank with 10W oil. Know drive system is weak. I was wondering if the light weight oil could be the problem. What weight oil should be used. I cannot find any information or service manual online.
No replies yet.