Controls - 42 JT100/JT100 All Terrain Operator’s Manual
Left Control Console
AT Drilling Controls
1. Outer spindle brake switch
2. Set/resume switch
3. Outer rotation speed control
4. Outer spindle tachometer
5. Inner spindle tachometer
6. Inner rotation pressure gauge
7. Inner rotation speed control
8. Manual inner rotation switch
9. Inner spindle switch
Item Description Notes
1. Outer spindle brake
switch
To engage, press
To disengage, press
IMPORTANT: Use when making
directional change.
• Prevents outer spindle from
turning when inner spindle or mud
motor is in use.
• Is temporarily released when front
wrench is closed to allow pipe
change.
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