Do I need to bleed my hydraulic system?

stevieb49829 · Apr 2, 2022

I just finished up installing a front pump, running a FEL on my MH 101 Jr. The cylinders and hoses were completely drained when I finished up the assembly, but I primed the pump before startup. I fired it up and after a few up and down, back and forth cycles, it seems to work good. Should I worry about air being trapped somewhere, or does the system work the air out of itself? I ran low on fluid at the first with some minor foam but that's gone now too, and the pump's quiet. steve

RESLLS · Apr 2, 2022

Half a dozen or so cycles and your done. Just check the oil level when you don't hear anymore air passing through the valves.

redforlife · Apr 2, 2022

All you should have to do to get air out, is cycle oil through what ever you drained or worked on. Fluid will push air back to the reservoir. But, you'll need to add fluid to the reservoir to replenish the oil that filled the air in the system.
You'll need to cycle oil through all hoses, cylinders, etc., that you worked on. Keep doing this, and checking fluid level, until oil quits dis-appearing from the reservoir (considering there is no leaks).

rustred · Apr 2, 2022

its done, your good to go.

stevieb49829 · Apr 3, 2022

I did miscalculate how much fluid it would take to fill 4 cylinders and all the hoses, so the pump was sporadically noisy until I topped off the tank. I'll keep an eye on the tank level in case it moves some more air out of the system. I think I calculated about a gallon of difference moving all the cylinders from top to bottom of stroke, so that's what I'm leaving for head room in my tank. In reality, that maximum change probably never occurs during any actual operation. Thanks for everyone's help on this. steve

Do I need to bleed my hydraulic system?

stevieb49829

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RESLLS

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redforlife

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rustred

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stevieb49829

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