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CAT Pilot Controls DEAD.

Kimo

Kimo

Active Member
Joined
Sep 15, 2017
Messages
29
Location
BS
CAT M312 pilot control fail.
OK, here we go again... Working along minding my business and pilot controls just quit. As I'm using it, dead stick. Boom is stuck extended in the air. I still have drive and auxiliary on joysticks but otherwise dead controls. No swing, no boom, stick or bucket. It must be a switch or solenoid something electrical somewhere. The drive works normally so the cutoff seems to be working. Checked fuses, relays and wiring for obvious boogers, nothing. Stumped again.
 
Bls repair

Bls repair

Senior Member
Joined
Jan 21, 2017
Messages
1,612
Location
S E Pa
Occupation
Equipment operator,mechanic
Just for the hell of it try jiggling the key switch.
 
Kimo

Kimo

Active Member
Joined
Sep 15, 2017
Messages
29
Location
BS
Thank you gentlemen. How do I test this thing? Can it be circumvented?
 
P

Per Eriksson

Senior Member
Joined
Oct 24, 2007
Messages
652
Location
Sweden
You can activate manually by pushing in the center pin on top of it but it is spring loaded so in order to run the machine someone has to push it all the time.

Remove the connector and check the spool for resistance, or swap with the one next to it and see what happens.
Check for power in the connector with ignition on and hydraulics activated
, i.e. armrest down and pilot control switch on.
 
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