Symptom: machine operates in forward & reverse, shifts through gears as it should, but as soon as I disengage the "inter-axle diff lock" (turn the switch to the off position), the machine jars up and will no longer move.
Selecting gears plays no bearing on the issue. No active codes present. Monitor sees no abnormalities as far as control pressures, fill switch errors, diff lock prop. solenoid...
KOMATSU HM300-2
KOMATSU HM300-2
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