Trouble Shooting

Disassembly

Possible Causes:
A
Bit blow tube is broke
B
Piston stuck in sleeve due to
  • ① Sleeve was pinched shut with wrench when threads were being loosened/tightened
  • ② Foreign material entered through drill string and jammed piston
  • ③ Mud backed up into hammer (when drilling under water), inspect the check valve
  • ④ An internal part failed

Slow penetration when pressure is ok

Possible Causes:
A
Dull or broken buttons on bit
B
Incorrect drill rotation or down pressure for the formation being drilled
C
Harder rock formation than the normal

Low pressure

Possible Causes:
A
Leak in the air line
B
Leak in the hammer ( crack or broken part)
C
Compressor output problem

High pressure

Possible Causes:
A
Air line is partially closed off
B
Foreign material clogging air passages in hammer
C
Bit blow holes are clogged