2007 CAT 420E / Weak Hydraulics / Machine shuts off periodcally

[screambuzz999]

I just bought a 207 CAT 420E and the machine will sometimes shut off for no reason. It does not seam to have the power that it should either, and the hydraulics are weak. I changed both fuel Filters drained all fuel out of the tank and replaced with about 5 gals. (that's all I had on hand) and that seemed to help the stalling issue a little bit. It stalled one time since replacing everything. Does it require more fuel then that? When I opened the tank to check the fuel level the tank had a vacuum on it.

Please Help!

 

[Dutchcat]

Maybe a new tank breather
Try running it with the cap off, just for testing,

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[screambuzz999]

Maybe a new tank breather
Try running it with the cap off, just for testing,

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This did not seem to help. Do I need to run some kind of fuel additive or cleaner through the system. Like seafoam?

 

[Dutchcat]

Did you open up the fuel filters?


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[screambuzz999]

Did you open up the fuel filters?


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No I did not cut them open. I should I guess.

I did replace them and and I still get the same problem out of the new ones. Although for a an hour or so after changing the fuel, the machine ran fine.

 

[screambuzz999]

In addition to my hydraulic weakness, the extendahoe does not work.

 

[Dutchcat]

Like nothing at all? Not even a change in rpm?


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[screambuzz999]

correct! It acts like it is not even connected. I just bought the machine at auction so I do not know the history of it. Is it possible that there are some hoses crossed? or possibly the button on the joystick is not working?

 

[Dutchcat]

If you have the prefix i could look it up on sis, did you check the implement lockout switch? Im not realy familliar with backhoes but hydraulics are all the same


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[screambuzz999]

I do not know what you mean by an implement lockout switch.

What prefix do you need? of the serial number (HLS) or model number? (420E)