Temperature & altitude are adjusted Air pressure is checked with pressure gauge Air filters are checked Minimum Level of rock oil is maintained

Drill Rods are Checked for

Air leakage’s throughout Pressure loss in hose

Weight on bit is checked for

Feed cylinder dropping Proper rotation & feed

Control tube is checked for

Correct diameter and height Chips at internal diameter Burrs on outer diameter

Check valve is checked for

Proper seating

Level of rig is checked for

Level jacks leakage Hydraulic pressure dropping at valve end

Hammer Parts Problems, Causes & Solutions Chart

Coupler

Problem Cause Solution Thread Locking Insufficient Lubrication Use proper amount &type of thread lubricants Damaged thread Thread breakage Improper or damaged mating parts Check the mating parts with api thread gauge Threads rust Maintain Proper Rust Preventive Oil Operated with damaged threads Check the mating parts Outer Diameter Body Wear Out Abrasive formation Increase hole cleaning Avoid the wear out bits Body cut Damaged threads Remove the threads burrs

Hammer Case

Problem Cause Solution Thread locking Insufficient lubrication Use proper amount & type of thread lubricants. Thread breakage/Crack Improper or damaged mating parts Denting at hammer case Check the mating parts with API thread gauge Open proper breakout tools   Do not open with heat & hit Threads rust Maintain proper rust prevent oil Operated with damaged threads Check the mating parts Od Body Wear Out Abrasive formation Increase hole cleaning Avoid the wear out bits Body Cut Damaged threads Remove the threads burs To check control tube seating face perpendicular to honing bore in hammer case Crack at Front Chuck End Case worn below acceptable limit Use new bit Replace hammer case Id Wear Out Insufficient lubrication Use proper amount & type of lubricants To check compressor filter To clean hammer case before assy To check control tube id To check coupler id To check drill rods id Cap drill rods after use Foreign material contamination

Check Valve

Problem Cause Solution Not sealing Worn or cut seal surface (Spring tension may less) Replace check valve Replace spring Melting Heavy temperature Check compressor out put temperature Use proper amount & type of lubricants

Control Tube

Problem Cause Solution Od Rubbing Insufficient lubrication Use proper amount & type of lubricants To check compressor filter To clean hammer case before assy To check control tube id To check coupler id To check drill rods id Cap drill rods after use Replace worn partsPin taper (digger) Control tube seating in hammer case (tiger) Foreign material contamination Work piston od hammer case ID Misalignment Cracked or Broken Heavy friction Foreign material keep out Use proper amount & Type of lubricants Maintain proper alignment Use proper amount & type of lubricants Rust

Piston

Problem Cause Solution OD Rubbing Insufficient lubrication Use proper amount & type of lubricants. To check compressor filter To clean hammer case before assy. To check control tube idTo check coupler id To check drill rods id Cap drill rods after use Replace worn parts Pin taper (digger) Control tube seating in hammer case (tiger) Foreign material contamination Worn piston OD hammer case ID Misalignment Cracked or Broken Heavy friction Foreign material keep out Use proper amount &type of lubricants Maintain proper alignment Use proper amount of lubricant Rust

Recommendations
Observe closely on hydraulic system elements and detect any leaks in the system, even though it may be very small, take appropriate action to correct them (simply by tightening the joints or reporting to the service engineer) Leaks on the radiator should be observed daily otherwise this will lead to engine failure.