50-30 Operation D20x22 Series II Navigator HDD
Step 2: Attach swivel to reamer as shown, by inserting bolt (1) through clevis end of swivel.
Secure with pin (2). Swivel must be aligned with the reamer before rotating the
reamer.
Vermeer double eye swivels are designed for use with Vermeer reamers to limit the angle
between the reamer and swivel. Vermeer swivels and reamers aligned within this limited angle
will reduce the possibility of whipping and rotation of the trailed product. The use of other
swivels and reamers may not provide this inherent benefit.
Resuming Operation
Step 1: Verify that drill string and cutting tools are ready for operation.
Step 2: Confirm everyone is away from the exit pit, drill string, and cutting tools, and that no
wrenches or tongs are attached to the drill string or cutting tools.
Step 3: Warn everyone who may be exposed to the drill string or cutting tools that operation will resume.
Step 4: Press and hold Run Switch on Remote Lockout transmitter for 2 seconds to enable drilling
operation, or return ignition key to machine if Remote Lockout was not used.
Step 5: Follow all communication requirements before resuming operation.
Pullback
NOTICE: Never rotate drill string counterclockwise while pulling back or backreaming. Counterclockwise
rotation will uncouple the drill string.
WARNING: Backreamer may not follow the bore path exactly. Because of increase in bore size and change in
bore path, the backreamer may make contact with underground hazards that were missed during drilling.
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