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.
Key
Person
Geetha V Nair
Chief Executive Officer
Head
Office & Works
Survey No. 222/1
Near Nagarjuna Nagar Colony
Cherlapally Road, RR
District
Hyderabad 500062 Andhra Pradesh,
INDIA
Telephone
+91-40-27126832, 27121828, 27126833, 27127072
Mobile
+91-9391072346
Fax
+91-40-27120558
E-mail
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