JT520 Operator’s Manual Conduct a Bore - 73
Position Equipment
CMW
Position Equipment
1. Review bore plan and select drilling unit position and fluid unit position. See “Select Start and End
Points” on page 47.
2. Move equipment into selected positions.
Start System
1. Start drilling unit and remote fluid unit. Allow both engines to warm up.
2. Enable tracker control mode if desired. See “Tracker Control” on page 99.
3. Move drilling unit throttle control until engine is at full throttle.
4. Move fluid control to desired setting to fill pipe with fluid.
Prime Drilling Fluid Pump
Prime drilling fluid pump each time tank is changed. To prime the pump:
1. Fill drilling fluid hose and connect hose to unit.
2. Operate mixing/transfer pump at full speed for 1 - 3 minutes to discharge air from system.
3. Return mixing/transfer pump to normal operating speed and continue the bore.
4. If drilling fluid pressure surges are observed, repeat step 2.
IMPORTANT: Ensure that mixture of drilling fluid matches drilling conditions.
Incorrect procedures could result in death, injury, or property damage.
Learn to use equipment correctly.
NOTICE: Failure to prime the drilling fluid pump will cause flow fluctuations, which will
make it difficult to control the washwand.
Pressurized fluid or air could pierce skin and cause injury
or death. Stay away.
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