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Atlas Copco DTH hammer technical manual.
Models covered by this manual:
QL40
QL45
QL50
QL55
QL60
QL65
QL70
QL80
QL120
QL200


CONTENTS:
Read this instruction manual before operating this equipment.
SAFETY .......................... 4
INSTALLATION AND OPERATION ...... 8
Follow Instructions
Description
DTH Setup ....................... 8
Setting up the DTH
Valve, choke selection and
Hydrocyclone® setup
Bailing velocity requirements
Valve selection
Choke sizing
Hydrocyclone® setup
Bit installation
New bit and chuck
Makeup torque and backhead closure
Drill lubrication .............. 10
Lubricators
Lubrication check
Water Injection
Drill operation ................ 11
Rotation speed
Collaring
Feed force
Hole cleaning, flushing, and dust suppression
Dry drilling
Wet drilling
Wet drilling with Hydrocyclone®
Bit changing ................... 13
Removing the drill bit
Removing the bit with percussion only
MAINTENANCE AND REPAIR ......... 14
DTH Service..................... 14
Disassembly
Hydrocyclone® .................. 19
Disassembly and service
DTH inspection ................. 19
Inspection
DTH assembly ................... 23
Assembly
Exhaust tube ................... 26
Replacement and installation
Bits ........................... 26
Selection
Service
Bit Sharpening
TROUBLESHOOTING ................ 28
SPECIFICATIONS ................. 31
ORDERING INSTRUCTIONS .......... 33
PARTS LIST ..................... 34

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