Issue with Ls170 NH

[Leahymech2]

Alright so here it goes,

I'm trying to figure out this problem on a New Holland ls170 skidsteer one of our landscape customers owns.
He came to us saying one of his guys was using the machine and went into a pile to get a load of loam when it just lost all Hydraulics in the unit. No bucket no boom and no drive.
It will run for about 2 minutes then what looks like the Hydro fluid light comes on and then the machine shuts down.
I致e checked all the fluids and all are toped off and mostly clean. It seems that all the safety switches work.
It dose come up with the code of F04 on the screen.
I知 stumped and my co-worker is too. And to top it off we do not have any manuals.

Thanks

Nick

 

[RickB]

Hydrostatic charge pressure switch is FUBAR. On a 170, I believe the switch is near the hydraulic filter.

 

[Leahymech2]

is ther any way to test that with out takeing it out. Like useing jumpers ?
with out the leads pluged into that pressure switch the machine runs, but still with out any bucket or boom controls no drive. dose that swtich close some other valve? or dose it shut and not any fluid threw?
sorry about all the questions NH is just new to me.