Vermeer D20x22 Series II, Operator'S Manual

Page: 192 / 232

50-26 Operation D20x22 Series II Navigator HDD
Exiting the Bore
It is critical to maintain good communication between the machine operator and locator operator. When the bore
reaches the exit point, crew must ensure everyone is clear of the area.
The operator should be ready to turn off drilling fluid pump as drill head exits the ground. Once drill head exits
the ground, use correct lockout procedures, so that inadvertent startup and rotation do not occur during the
tooling change.
• “Lockout Procedure - With Remote Lockout,”
page 30-14
• “Lockout Procedure - Without Remote Lockout System,”
page 30-17
C
HANGING
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OOLS AT
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EMOTE
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XIT
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IT
Extreme care must be taken during any tooling changes on the machine. Clear and understandable
communication between members of the directional drill unit’s crew is crucial for correct, complete, and efficient
installation of the utility in a safe and timely manner. The distance between drill unit and drill string exit
location may prevent visual contact and direct voice communication between the crew at the exit location and
the machine operator.