Undoing Threads

Undoing threads loose to change Percussion Bits

When undoing the Drive Sub loose to change Percussion bits follow these guidelines.

  • Keep hands well clear of the bottom of the hammer. Only grip the Drive Sub and the Percussion Bit from the sides as fingers can be jammed if anything falls.
  • Always use the hydraulic breakout on the Drill Rig. If this is not available use a wrap around wrench to prevent crushing of the Piston Case.
  • Always use good sharp jaws in the breakout as the Piston Case is hardened and only good quality jaws will be able to grip the Piston Case.
  • Do not heat the hammer, this may cause cracking of the Piston Case.