Volvo EC35

[Theheisk]

Suddenly lost control hydraulics. I have track power as well as blade. I noticed the cable that runs from the left hand joystick was almost broke so I disconnected it and operated it manually under floor board but no dice. The prints show a safety switch but I don’t see anything connected to the cable. even Volvo can’t figure it out. I need some help!

 

[uffex]

Good day
The tracks & blade are mechanical operation, the rest rely on servo-pilot pressure. I suggest you begin with a pressure check.See attched.
Kind regards
Uffex

 

[Theheisk]

Thanks for the reply. I had just rebuild the swing valve before the trouble started. Could it be the swing Valve?

 

[uffex]

Good day
Possible cause could be the check valve in the pin coupler, have you any issues when changing buckets?
Kind regards
Uffex

 

[Theheisk]

After I had my swing/slew valve rebuilt is when my controls stopped working . I only have blade and track movement now. No joy stick controls.

 

[uffex]

Good day
Could you please explain what exactly was the slew rebuild?
Kind regards
Uffex

 

[Theheisk]

Seal kit and O rings. It was leaking is the reason for rebuild.

 

[uffex]

Good day
I cannot see any relation to that work and loss of attachment movements, back to a servo/pilot pressure check. Be sure you have not disconnected the solenoid valve (Control lock out) Armrest Safety valve.
Kind regards
Uffex

 

[Theheisk]

OK, I really appreciate all your help. Last question where could I get one of the testing tools.

Thanks again!!!

 

[uffex]

Good day
Not sure what test tools you refer, control lock out you should feel movement as you switch on-off. Mesasure the pressure i would suggest a 3" 6000p.s..i gauge its good enough for checking the pressures. If you would like to go down a tool that will do load sensing Delta P we are talking electronic and more expensive. Parker example
Kind regards
Uffex

 

[randolph85j]

Did you ever figure this out?