Case 420 B 1958? how to bleed the hydraulics

Jedbo · Jul 19, 2013

Hoping someone can help me, I inherited my grandpa's Case 420B from the 1950's and the hydraulics kind of work, mostly not... The fluid is very milky and it's been sitting for a long time. I have found the bleeder valves and have been bleeding air out.. a lot! What is the best way to change the hydraulic fluid? Should I drain it all out and then replace it and bleed off the air? Should I add new stuff and bleed off the bad stuff?
Any help would be appreciated! Thanks!

Husker44A · Jul 19, 2013

Drain and refill with new oil and filter. Do the same with engine. Let it get to operating temp first. seems to help clean sludge out better. Drain some out then refill with half gallon of diesel. Start engine let it run a minute then drain oil then refill with new oil and filter. As for the hydros not sure if the flushing can be done with diesel or not. Buy a operators manual. Very handy to have.

Case 420 B 1958? how to bleed the hydraulics

Jedbo

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Husker44A

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