Crown RC3020-30:
Hydraulics??? Novice

Real novice here.
I let the hydraulic fluid get real low. Just added 2 gallons but the symptoms are the same;
Will go forward and reverse - no problem.
Tilt works.
Will raise or lower - once per hour and then..... When I want to lower, without pushing tilt button it tilts forward. When I want to raise it gives a high pitched vibrating, buzzing / noise and nothing happens. The source of the 'buzz' is hard to pinpoint - maybe the red 'thing' under the key. I was hoping pouring in fluid would fix this - please help.

To clarify - if I wait an hour or so it will go through 1 lift / lower cycle and then freeze up. By freeze up, I mean without pushing the tilt button, if I push to lower it tilts down and if I pull back to raise it buzzes.
  • Posted 16 Feb 2015 07:19
  • Modified 16 Feb 2015 10:45 by poster
  • Discussion started by davidca
  • California, United States
Showing items 1 - 4 of 4 results.
L/O Box is "lockout box" Inside are your relays for your function controls. It is located just to the fork side of the SCR panel.

A solenoid valve is an electromagnetic valve that opens and closes; in this case allows (open) and shuts off (closes) hydraulic pressure flow depending on selection from the operator controls.
  • Posted 5 Apr 2016 04:40
  • Modified 5 Apr 2016 04:41 by poster
  • Reply by chevotaman
  • Texas, United States
It's all just nuts n' bolts.
At that time - I replaced the hydraulic filter and added fluid and it has worked fine --- until recently. Now doing same thing. I have filled fluid so that it just today overflowed but have not changed the filter again.
To be honest I've never changed the fluid completely....I don't know what a SOL Valve or L/O box is.
Can you give a little more advise and I do think I could figure this out.
I'm afraid to call for repair because of bad (lieing) experience a few years ago and I don't know that anyone around here has any experience with this type machine.
  • Posted 25 Mar 2016 10:12
  • Reply by davidca
  • California, United States
check the tilt switch button. if it is faulty it will think you still want to tilt instead of lift
  • Posted 22 Feb 2015 06:57
  • Reply by popeye
  • Ohio, United States
Sounds like sol valve sticking or an issue in the L/O box to me.
  • Posted 17 Feb 2015 02:40
  • Reply by chevotaman
  • Texas, United States
It's all just nuts n' bolts.

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