50-36 Operation D7x11 Series II Navigator Directional Drill
FLUSHING BENTONITE/POLYMERS FROM DRILLING FLUID SYSTEM
If bentonite or polymers were added to drilling fluid, flush system with fresh water before stowing equipment.
Step 1: Turn water system on and flush water through machine hoses and drive plate. Shut off water system.
Step 2: Connect wash wand to drilling fluid pump quick coupler (1).
Step 3: Turn water system on and flush water through wash wand until water is
clean and clear.
Step 4: Shut off water system.
Step 5: Point wash wand away from people and squeeze handle to release water
pressure remaining in wand.
Step 6: Remove wash wand from drilling fluid pump quick coupler and store on
transport vehicle.
NOTE: If freezing weather is expected, remove all water from drill unit or add RV-
type antifreeze. Refer to the Overview section, “Adding Antifreeze to Drilling Fluid
System,” page 30-34.
Machine - Wash
Before loading onto transport vehicle, use procedure on previous page to wash drill unit with clean water to
remove accumulated polymers and dirt.
WARNING: High pressure water can penetrate skin. Serious injury possible. Fluid
injected under the skin must be removed immediately by a surgeon familiar with this
type of injury.
Keep nozzles away from body.
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