Ditch Witch JT520, Operator'S Manual

Page: 79 / 151

Conduct a Bore - 78
JT520 Operator’s Manual
Add Pipe
CMW
Add Pipe
1. When joint flats are aligned with front wrench, release joystick.
2. Engage front wrench.
3. Rotate spindle clockwise slowly until wrench flats engage pipe flats.
4. Reverse rotation and slowly move carriage back as threads unscrew.
5. Take next pipe from pipe box and place it inline with saver sub and last pipe.
6. Lubricate shoulders and threads.
7. Lubricate the saver sub at least every five pipes or when the thread is shiny.
8. Connect pipe to saver sub.
• Move carriage forward until saver sub nears male pipe thread.
• Continue to lower carriage and rotate spindle until pipe screws into saver sub.
• Move carriage forward until front end of pipe is aligned with male thread of last pipe
9. Use machine power to slowly rotate spindle and drill pipe onto male thread.
10. Tighten to full machine torque.
11. Ensure engine is at full throttle.
12. Move fluid control to desired setting to fill pipe with fluid.
13. Ensure that pipe fills and fluid pressure begins to rise.
14. Rotate spindle.
15. Slowly move carriage forward. Adjust rotation speed control according to bit size and soil conditions.
16. Monitor gauges.
17. Locate drill head with tracker at least every half-length of pipe.
NOTICE: To prevent unnecessary load on threads, which can lead to thread wear, slowly move
carriage back while unscrewing.