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View Full Version : cat 416b backhoe boom issues


mike33087
03-06-2011, 04:34 PM
I have a 95 cat 416b backhoe, recently i replaced all of they hydro lines on the boom because they were worn and close to blowing. after changing them i topped off the fluid and started the machine. some functions work some don't some i have to use both levers for one action. im pretty certain i put the lines in the right spots, do i have to bleed the cylinders or could one be air locked? any help / diagrams would be appreciated. thanks

bobcat_ron
03-06-2011, 07:32 PM
Crack the fittings loose and try again, you got major air trapped in the lines.

mike33087
03-07-2011, 11:33 AM
so do i just crack the fittings let some fluid run out then tighten them up and run it again? and suggestions if this does not work?

bobcat_ron
03-07-2011, 11:50 AM
Crack a fitting and just let the machine idle and move a control for the hose a bit.

A.EXCAVATING
03-07-2011, 04:49 PM
check all your hoses again and then crack the lines if its straight fluid coming out you should be find but least bit of air and it will mess you all up

wanabe
03-07-2011, 06:43 PM
Deere dealer told me once that after replacing a line or cylinder to just pull the controll lever and hold it in place for a few sec, then cycle the controll the other way and hold for a few seconds again to get the air out, and that seemed to work.

bearmtnmartin
03-07-2011, 09:48 PM
Deere dealer told me once that after replacing a line or cylinder to just pull the controll lever and hold it in place for a few sec, then cycle the controll the other way and hold for a few seconds again to get the air out, and that seemed to work.
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bearmtnmartin
03-07-2011, 09:50 PM
Deere dealer told me once that after replacing a line or cylinder to just pull the controll lever and hold it in place for a few sec, then cycle the controll the other way and hold for a few seconds again to get the air out, and that seemed to work.

Having had a pos 416 b and replaced way too many lines, I would suggest that you have a couple crossed.....I don't remember ever having to bleed anything. They just shudder for a bit and then go.
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mike33087
03-08-2011, 11:05 AM
does anyone know where i can get a diagram for the lines?

A.EXCAVATING
03-08-2011, 04:23 PM
Just go to your local cat dealer and ask them for a diagram and they should print something out for you

mike33087
03-09-2011, 06:04 PM
well after taking it apart again, and figuring out how the valves are lined up i traced all the lines from the pistons to the valves and wow did i have a cluster ****!!! all set now works like a dream... Amazing what an oil change and changing up some filters can do for your HP

thanks for the help

A.EXCAVATING
03-10-2011, 07:01 PM
haha yea happens to the best of us man done it myself!!