Troubleshooting: No FWD/REV - Technical Troubleshooting discussion in Forkliftaction's forums

Crown RC3020-30:
Troubleshooting: No FWD/REV

Having trouble with my residential workshop RC3020. I have spent 12 hours toning out wiring throughout the lift with every access panel and plate removed.

My FWD/REV performance has gone from intermittent to absent. Batteries at 38.6V; Amperage good; fluids good -- before your ask ;-) I was able to get "some" movement if I unplugged the batteries and inserted. Sometimes it operates, sometimes a single side of the FWD/REV solenoid clicks. If this happens then I need to unplug/plug to get flow.

At this point, I have performed the following diagnostic steps:
+ verified main power solenoid function
+ verified that all connection solenoids operate correctly with 24V
+ chased all signal wires/leads from solenoid to ECU
+ ohm'd the micro switches on the control stick

The lift and tilt are still working fine. The steering drive is operational.

What am I missing? At current, the only solenoids operating are the main power solenoid and the hydrolic pump solenoid. I'm not hearing or seeing the other solenoid/switches operating. I "think" I'm only getting 18V to these solenoid/switches.

Other tips from people far smarter than I?

Thanks!

/jm

Posted 4 Jan 2012 08:46
Discussion started by joelmcf
Texas, United States

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Showing items 1 - 6 of 6 results.

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I know this is an old thread but I am having the same problem, do you remember which card or board it was?

Posted 21 Feb 2019 14:43
Reply by HelpMeLift
California, United States

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it was a bad card.

Posted 6 May 2015 12:52
Reply by mechNtraining
Oklahoma, United States

Do it Today or Tomorrow But You will Do it.

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Check your brake switch, its under the brake pedal. then check the deadman switch. Clean off your contact tips for your fwd rev. check voltage at your solenoids for fwd rev. Check to see if your pot for fwd rev is centered (ohm it out to do so).....

Posted 6 May 2015 12:43
Reply by Nettle
Utah, United States

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my bet/W.A.G. is he had bad contactors.

Posted 29 Apr 2015 20:10
Reply by edward_t
South Carolina, United States

"it's not rocket surgery"

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That old post was from Jan. 2012.
What works and what does not work?

Posted 29 Apr 2015 13:38
Reply by 1Crusader
California, United States

I didn't do it, nobody saw me and You can't prove a thing...

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WHAT DID YOU FIND out and what was the solution? As i have the same problem.

Posted 29 Apr 2015 13:08
Reply by mechNtraining
Oklahoma, United States

Do it Today or Tomorrow But You will Do it.

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