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Komatsu FG25N:
Mast controls locked

Did you ever figure out this problem?

• Posted 12 Mar 2021 10:53
• Reply by Matt_Cade
• Tennessee, United States

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Did you ever figure out this problem?

• Posted 12 Mar 2021 10:53
• Reply by Matt_Cade
• Tennessee, United States

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What is your full model and serial number? It sounds like the Operator Presence System is not sensing a operator in the seat. Like Prentice said - check seat switch and seat sw wiring. How many times is the ! light flashing? This is a code to point you in the right direction.

• Posted 19 Jan 2017 23:12
• Reply by Jeff
• Georgia, United States

There is nothing worse than a sharp image of a fuzzy concept.
-Ansel Adams

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We worked on a Komatsu Diesel in the summer( Might be the same??) they have a solenoid lock on the bottom of the control valve. Check Seat switch and and voltage to solenoid. I think you can physically pull out ( Watch out for the mast dropping...Safety First :) )

• Posted 10 Jan 2017 07:02
• Reply by Prentice
• Ontario, Canada

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