JT920/JT920L - OPERATION 89
OPERATE THRUST/ROTATION CONTROL
JT920/JT920L - OPERATION 89
OPERATE THRUST/ROTATION CONTROL
1. Start drilling unit and remote fluid unit, if used. If using
onboard drilling fluid tank, remove hose from top of tank.
Allow both engines to warm up.
IMPORTANT: Ensure that mixture of drilling fluid matches
drilling conditions.
2. Press top of drilling unit throttle switch until engine is at full
throttle.
3. Adjust fluid pressure.
• Press and hold top of fluid pump switch until pipe fills and
fluid pressure begins to rise.
• Adjust fluid flow control to set pressure to appropriate level.
Do not exceed maximum pump setting.
1. Start drilling unit and remote fluid unit, if used. If using
onboard drilling fluid tank, remove hose from top of tank.
Allow both engines to warm up.
IMPORTANT: Ensure that mixture of drilling fluid matches
drilling conditions.
2. Press top of drilling unit throttle switch until engine is at full
throttle.
3. Adjust fluid pressure.
• Press and hold top of fluid pump switch until pipe fills and
fluid pressure begins to rise.
• Adjust fluid flow control to set pressure to appropriate level.
Do not exceed maximum pump setting.
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