Hammer Piston Casing Breakage and Tread Breakage have been demonstrated in former article, today we will show you some cases of Hammer Piston broken.
Case 1
- Problem
- Galling
- Probable cause
- The signs of wear and streaking indicate that galling is the cause of this breakage that has occurred shortly after another piston breakage in the same hammer
- Corrective action
- Make sure that piston casing is polished or honed before a new piston is installed
Case 2
- Problem
- Broken piston internal
- Probable cause
- The crack propagation pattern shows that the failure started from the hole in the piston.
- Most probable cause is galling between piston and feed tube
- Corrective action
- Check lubrication system and contamination in the hammer.
- Look at signs of galling on feed tube at hammer maintenance
Case 3
- Problem
- Piston failure
- Probable cause
- Typical sign of some sort of damage to the surface on the piston most probably from mishandling during hammer maintenance
- Corrective action
- Be careful when handling hammer components and check for signs of surface damage
Case 4
- Problem
- Piston striking face damage
- Probable cause
- These signs of erosion may come from jetting of water trapped between piston and bit striking faces
- Corrective action
- Reduce the amount of water injection