STEP 1. REMOVE THE STRIKING BAR RETAINNER FROM THE DRILL ENGINE, INSTALL STRIKING BAR, AND
REINSTALL RETAINER.
STEP 2. MOVE DRILL HANDLE ( FIG. 2-1) TO THE VERTICAL POSITION UNTIL DRILL ENGINE HAS REACHED
BACK OF FED.
STEP 3. COAT THREADS OF STRIKING BAR, COUPLING, AND STEEL WITH THREAD COMPOUND AND
ASSEMBLE.
STEP 4. OPEN THE CENTRALIZER AND HAND TURN THE ASSEMBLED BIT, STEEL, AND COUPLING INTO
STRIKING BAR. CLOSE CENTRALIZER.
STEP 5. TO MAINTAIN HOLE ALIGHNMENT AND PREVENT STEEL FROM STICKING, IN THE HOLE, NEVER
CHANGE THE POSITION OF THE BOOM OR TRAM AFTER DRILLING IS STARTED.
Figure 2-7. Rock drill steel system installed.
2-10
