how to fill a floor jack??

[popeye55]

i have two that are needing filled...both ahave small leak and are getting where tey don;t raise all the way. they are just regular floorjacks...just wondered what the procedure was to get all the air and proper fill. i don' have the manual as i am sure you can tell....thanks

[doverarjim]

I have not had to do this in a while, but on my Blackhawk floor jack in the pump part of the jack is a 3/8" plug you pull out and pour in your jack oil. You want to fill it almost all the way up to the plug, put the plug back in and jack away.