LX565 Hydrostatic charge pressure Indicator Light On

[codynewholland]

550 hours on LX565. Working it yesterday and the light comes on, alarm beeps and shuts down. First skid loader to own so I don't know much about them. I did change the hydraulic oil filter but it did not help. Can someone tell me the obvious things to look for? After I started it back up, sitting still at idle speed, I can hear a slight knock from time to time. My guess it was air in the line after changing the hydraulic oil filter but not certain. Thanks

 

[skidsteer.ca]

You need to attach a guage T'd to the pressure sender on the hyd filter housing and check your charge pressure.
It could be that sender is bad, or that the charge pressure valve that restricts the flow exiting that filter until it has reached the correct charged pressure has failed.
Here is a link to a manual for a newer ls160, but it is the same machine http://www.mediafire.com/?ux89bq2u4u3ug
Ken