Trouble Shooting and Maintenance Hints: Drilling rock is a very difficult process and during drilling some problems with hammers might be faced. In order to avoid such problem the following precautions are taken...

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Hammers

Trouble Shooting and Maintenance Hints
Drilling rock is a very difficult process and during drilling some problems with hammers might be faced. In order to avoid such problem the following precautions are taken:

Compressor Output is Checked

	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.

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