HORIZONTAL DIRECTIONAL DRILLING RIG (HDDR) WITH MECHANICAL PIPE HANDLING. A SELF-PROPELLED RUBBER TRACKED DRILLING UNIT ON, AND INTEGRAL TO, A HEAVY DUTY FRAME POWERED BY A 188 HP TURBODIESEL ENGINE. OPTIONAL FEATURES INCLUDE: PIPE LOADER [HOLDS 9 PIECES OF 15' DRILL PIPE], DRILLING FLUID PUMP, ON BOARD HYDRAULIC BOOM CRANE AND DRILL PIPE. THE HDDR FUNCTION IS FOR USE IN MOBILE 'TRENCHLESS' OPERATIONS. CONSIDERED A SELF-PROPELLED WHEELED EARTH BORING/DRILLING MACHINE IN WHICH THE CHASSIS AND THE WORKING MACHINE ARE SPECIALLY DESIGNED FOR EACH OTHER AND FORM AN INTEGRAL MECHANICAL UNIT AND NOT SIMPLY A MACHINE MOUNTED ON AN AUTOMOBILE CHASSIS.

CLASSIFICATION IS DETERMINED BY GENERAL RULES 1 AND 6 TOGETHER WITH THE TEXT TO CN CODES 8430, 843041 AND 84304100.