Atlas Copco Secoroc 7655, Secoroc 76, Secoroc 7655D Operator's Manual

Secoroc 76 Series Rock Drill

Secoroc 7655/7655D Pusher Leg Rock Drill

Operator's instructions / Spare parts list

Secoroc Rock Drilling Tools

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Foreword

Thank you for selecting the Secoroc pusher leg rock drill 7655/7655D.

These instructions were developed to help you get the best performance and
productivity from the use of your new rock drill.

Please refer to them also for the correct maintenance of the rock drill.

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Table of Contents

Scope of application ................................................... 4

Specification ....................................................... 4

Safety instructions ..................................................... 5

Operation ............................................................ 6

Using the rock drill for the first time .................................... 6

Preparations before starting .......................................... 6

Fitting and removing the drill steel ..................................... 7

Before fitting the drill steel .........................................7

Fitting the drill steel ...............................................8

Removing the drill steel............................................8

Attaching the pusher leg to the rock drill ................................ 8

Controls ........................................................... 9

Throttle lever.....................................................9

Feed control .....................................................9

Trigger.........................................................10

Oil regulating valve ..............................................10

Drilling ........................................................... 11

Starting the rock drill .............................................11

Stopping the rock drill ............................................11

Checking the lubrication ..........................................11

Re-positioning the pusher leg .....................................11

Blow-cleaning the drill hole........................................11

When you have finished drilling ....................................12

Maintenance ...................................................... 12

Once a shift (after 8 hours of operation) .............................12

Once a week (after 40 hours of operation) ............................12

Once a month (after 200 hours of operation)..........................12

Selection of spare parts ............................................. 13

Storage .......................................................... 13

Scrapping and waste disposal ....................................... 13

Trouble shooting ..................................................... 14

Spare parts list and exploded drawing ................................... 16

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Scope of application

Model 7655 is a highly efficient rock drill. It is mainly used in either rock drilling
work such as mining and tunneling, or in railway, water conservancy construction
projects and stone work. It is suitable for wet drilling on hard and medium hard
rock, or for drilling horizontal or inclined blast holes. 7655 can be equipped with
pusher leg FT160A and FY200A lubricator.

Model 7655D is a low energy consumption rock drill based on model 7655. It has
good performance at low air pressure, with long air lines or powered by small sized
air compressor. 7655D is mainly used in the same applications as the 7655. It can be
equipped with pusher leg FT160A and FY200A lubricator.

Specification

Pneumatic rock drills 7655 and 7655D

7655 7655D

Weight 24 24 kg

Dimension (L x W x H) 628 x 232 x 207 668 x 232 x 202 mm

Cylinder diameter 76 70 mm

Piston stroke 55 70 mm

Minimum working pressure 3 3 bar(e)

Impact energy (at 6.3 bar (e)) ≥65 ≥65 J

Impact energy (at 5.0 bar (e)) ≥59 ≥57 J

Impact energy (at 4.0 bar (e)) ≥42 ≥44 J

Air consumption (at 6.3 bar (e)) ≤80 ≤80 l/s

Air consumption (at 5.0 bar (e)) ≤54 ≤52 l/s

Air consumption (at 4.0 bar (e)) ≤50 ≤45 l/s

Impact frequency (at 6.3 bar (e)) ≥37 ≥32 Hz

Impact frequency (at 5.0 bar (e)) ≥36 ≥31 Hz

Impact frequency (at 4.0 bar (e)) ≥34 ≥30 Hz

Torque (at 6.3 bar (e)) ≥18 ≥18 Nm

Torque (at 5.0 bar (e)) ≥15 ≥15 Nm

Torque (at 4.0 bar (e)) ≥12 ≥12 Nm

Water pressure working pressure -1 working pressure -1 bar(e)

Air hose inner diameter 25 19 mm

Water hose inner diameter 13 13 mm

Drilling diameter 34–42 34–42 mm

Max drilling depth 5 5 m

Working temperature -30 to +50 -30 to +50 ºC

Shank size H22x108±1 H22x108±1 mm

Noise level ≤125 dB(A)

Lubricator FY200A

Weight 1.2 kg

Capacity 0.2 litre

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Safety instructions

To reduce the risk of serious injury or death to yourself or others, carefully read
through this instruction booklet before putting the rock drill to use. Always follow
the instructions given in this manual.

h Always wear a safety helmet, impact resistant eye protection with side protection

and ear protectors with CE mark during drilling. Any local regulations that exist
must also be observed.

h When drilling in certain minerals, there is a risk of spark generation. Before

starting work, check that the machine is approved (in accordance with local
regulations) for work under such conditions.

h Always take great care when using the machine. The drill steel is subjected to

heavy loading and can break, with a risk of injury to personnel.

h Check that the hoses used are of the right quality, and that all hose connections

are in good condition and properly tightened.

h Before starting work on any of the systems, make sure that the air and water

systems are without pressure.

h Make sure that there are no concealed wires or other sources of electricity. Never

drill near any electric wires or other sources of electricity.

h Exposure to crystalline silica (sometimes called 'silica dust') as a result of drilling

in rock may cause silicosis, cancer or death. Never operate the rock drill without
water flushing.

h A compressed air hose that comes loose can lash around and cause personal

injury or death. Check that the compressed air conections are not damaged and
that they are properly attached.

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Operation

Using the rock drill for the first time

When the rock drill arrives from the factory, the inside of the machine is coated with
heavy oil to prevent corrosion.

After unpacking and installing the machine, pour a small amount of lubrication
oil into the air connection and operate the machine on partial throttle to clean the
interior. Follow this immediately with a liberal amount of air tool oil.

The rock drill and pusher leg are lubricated with oil mixed with compressed air,
which is taken to the parts that need continuous lubrication. Oil is metered into the
compressed air using the FY200A lubricator connected to the air line.

Preparations before starting

1. Check the drilling equipment

h Check that all of the drilling equipment is in good working order.

h Check that the impact surface of the drill steel shank is flat with no signs of wear.

h Make sure that the air inlet and exhaust ports are free from obstructions.

h Check that the flushing holes in the drill steel and drill bit are not blocked and

that the flushing air/water flows through without obstruction.

h Ensure that the fittings are tight and leak-proof.

WARNING

A compressed air hose that comes loose can lash around and cause personal injury or
death. Check that the compressed air conections are not damaged and that they are
properly attached.

2. Blow out the air hose

Every day before using the drill, blow out the air hose to clear it from accumulated
dirt and moisture.

3. Check the lubrication oil level

h Fill the lubricator with oil if necessary.

h Always use a recommended lubricant.

Lubricant recommendation

Use a mineral-based air tool oil

Ambient
temperature ºC

Viscosity grade
(ISO 3448)

-30 to 0 ISO VG 32-68

-10 to +20 ISO VG 68-100

+10 to +50 ISO VG 100-150