Mincon Rockdrills MC60, MC30 Service Manual

Mincon MC60

www.CrowderSupply.com • Toll Free: 888-883-5144

Crowder Supply Co., Inc. • 8495 Roslyn St., Commerce City, CO 80022 • Toll Free: 888-883-5144 • www.CrowderSupply.com

www.CrowderSupply.com • Toll Free: 888-883-5144

Crowder Supply Co., Inc. • 8495 Roslyn St., Commerce City, CO 80022 • Toll Free: 888-883-5144 • www.CrowderSupply.com

Table of Contents

1. INTRODUCTION .................................................................................................................................. 3

2. INSTALLATION AND OPERATION ..................................................................................................... 3

2.1 SAFETY ................................................................................................................................................................... 3

2.2 HAMMER CARE. ....................................................................................................................................................... 3

2.2.1 Storage ............................................................................................................................................................ 3

2.2.2 Commissioning................................................................................................................................................ 3

2.2.3 Lubrication ....................................................................................................................................................... 3

2.2.4 Operation ........................................................................................................................................................ 4

2.3 SERVICING .............................................................................................................................................................. 4

2.3.1 General ........................................................................................................................................................... 4

2.3.2 Opening Chuck and Backhead ....................................................................................................................... 5

2.3.3 Dismantling Hammer to Change Drill Bit ........................................................................................................ 5

2.3.4 Disassembly for Full Servicing of Hammer ..................................................................................................... 5

2.3.5 Inspection ........................................................................................................................................................ 5

2.3.6 Checking Wear Limits ..................................................................................................................................... 6

2.3.7 Reassembly .................................................................................................................................................... 6

3. TROUBLE SHOOTING ........................................................................................................................ 7

4. APPENDIX ........................................................................................................................................... 8

4.1 DTH HAMMER EXPLODED VIEW AND PARTS LIST AND TECHNICAL DATA .................................................................... 8

4.2 HAMMER SERVICE LOG ............................................................................................................................................ 9

5. WARRANTY ........................................................................................................................................ 9

Mincon Rockdrills – “The Driller’s Choice” Page 2

www.CrowderSupply.com • Toll Free: 888-883-5144

Crowder Supply Co., Inc. • 8495 Roslyn St., Commerce City, CO 80022 • Toll Free: 888-883-5144 • www.CrowderSupply.com

1. Introduction

Thank you for choosing the Mincon MC60 Down-the-Hole hammer. Please read this manual carefully before using your hammer in
the interests of safety, warranty and best operational care. The Mincon MC60 is ruggedly built with a hardened wear sleeve to
withstand the stresses of drilling in the most extreme conditions. However, on the inside it is a precision tool with care taken in
manufacture to ensure that the components meet finely matching tolerances to provide fast drilling, reliability and efficient use of air
without waste. With correct ca r e your M incon MC60 hammer should provide you with top performance rel iab ili ty and long serv ice
life.

Warranty is provided by Mincon as per the warranty section 5.
Please keep this instruction manual as a permanent part of your DTH Hammer.
The specifications and instructions contained in this manual are based on the up-to-date information as at publication date.

2. Installation and Operation

2.1 Safety

Be sure to work safely at all times. Wear protective clothing and safety equipment and observe all safety regulations as prescribed
by your employer, Government, or the site on which you work. Do not wear loose clothing that may get caught in rotating parts and
cause serious personal injury.

Remember that a “Down-the-Hole” percussive hammer emits noise and you should therefore take every precaution to safeguard
your hearing against damage by using proper ear protectors. Use eye protection at all times. Rock chips and dust which may be
discharged from the face of the bit or bore hole at high velocities and can cause severe injury.

Hammers can be heavy – Always use proper and approved lifting equipment and take every precaution to safeguard yourself
against injury. Keep hands clear at all times – Beware of getting fingers trapped between the chuck and bit and do not use hands or
feet to clear the top of the borehole at any time.

Other safety advice is given throughout this document which you are advised to read.

2.2 Hammer Care.

2.2.1 Storage

If you intend to store the Hammer, we recommend that ½ pint (¼ litre) of good quality rock drill oil be poured into the hammer to
protect it. The oil should be poured through the backhead and by using a long screwdriver inserted into the backhead; the check
valve can be depressed to allow the oil to run down into the piston chamber. Ensure that the thread protector and chuck cap are
fitted to keep debris out and to prevent oil leakage. Store the hammer horizontally in a clean dry place.

2.2.2 Commissioning

Always use reputable drill bits in good condition. Using overrun bits will effect penetration rates, and reduce chuck life significantly
due to excess cuttings wash.

Coat the drill bit shank and the hammer threads with grease for protection and easier dismantling. Prior to use, lubricate the
hammer with ½ pint (¼ litre) of rock drill oil as described above.
Fit the hammer to the drilling rig ensuring no debris or dirt enters the hammer from the site, dirty tubes or from unclean air lines.
Make sure that the coupling threads from the drill are of the same specification to that of the hammer and they are in good
condition. Run the hammer at half the air flow for a few minutes to allow the oil to flow through and for internal components to settle
in.

2.2.3 Lubrication

It is vital for DTH hammers to receive a constant supply of proper rock drill oil to protect the internal components and to provide a
good air seal between the piston and the inner cylinder, and the piston and the wear sleeve for efficient drilling. The correct
consumption of oil is dependent upon the air volume and conditions. Please refer to the lubrication graph below for
recommendations. When drilling in wet conditions the normal amount should be doubled. There should be visual evidence of oil
around the drill bit shank and within the tube joints when changing tubes.

The recommended grade of oil is dependent on the ambient temperature in which drilling is taking place as well as the operating
pressure. As a rule of thumb, ISO320 grade rock drill oil should be used whenever possible as the hammer is a high frequency tool,
however, where the pump cannot pump the oil in colder conditions, a lower grade of oil can be used as per the graph below.

Mincon Rockdrills – “The Driller’s Choice” Page 3