Atlas Copco Secoroc YT29A Specifications

Secoroc Rock Drilling Tools
Secoroc YT29A Pusher Leg Rock Drill
Operator's instructions / Spare parts list
Secoroc YT Series Rock Drill

Foreword
Thank you for selecting the Secoroc YT29A pusher leg rock drill.
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 correct maintenance of the machine.
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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 tool ......................................... 7
Before fitting the working tool ......................................7
Fitting the working tool ............................................8
Removing the working tool .........................................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
Re-positioning the pusher leg .....................................11
Blow-cleaning the drill hole........................................11
When you have finished drilling ....................................12
Maintenance ...................................................... 12
Selection of spare parts ..........................................12
Once a shift (after 8 hours of operation) .............................12
Once a week (after 40 hours of operation) ............................13
Once a month (after 200 hours of operation)..........................13
Measures to prevent freezing ........................................ 13
Scrapping and waste disposal ....................................... 13
Trouble shooting ..................................................... 14
Spare parts list and exploded drawing ................................... 16
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Scope of application
Secoroc YT29A is a heavy-duty pusher leg Rock Drill featuring high efficiency and
low air consumption. It is primarily designed for drilling in mines, hydropower
stations, and road construction projects. It is also a new product suitable for
tunneling and other stone works in mining and metallurgical industry.
Secoroc YT29A is suitable for both horizontal and upward anchor holes in medium-
hard and hard rocks (100–350 MPa). The hole diameter range is from 32 mm to 45
mm with depths up to 5 meters. The Rock Drill is equipped with lubricator FY250.
Secoroc YT29A is intended to be used together with pusher leg FT160A, FT160B,
FT160C or FT170 for different tunneling and work conditions. It is also designed for
dry drilling or wet drilling mounted on rigs.
Specification
Pneumatic rock drill YT29A
Weight 27 kg
Dimension (L x W x H) 659x248x205 mm
Cylinder diameter 82 mm
Piston stroke 60 mm
Working pressure 3,5–5 Bar(e)
Impact energy (at 5 bar(e)) ≥70 J
Air consumption (at 5 bar(e)) ≤65 l/s
Impact frequency (at 5 bar(e)) ≥37 Hz
Water pressure working pressure -1 Bar(e)
Air hose inner diameter 25 mm
Water hose inner diameter 13 mm
Drilling diameter 32–45 mm
Max Drilling depth 5 m
Working temperature -30 to +45 ºC
Shank size H22x108±1 mm
Noise level ≤127 dB(A)
Lubricator FY250
Weight 1.2 kg
Capacity 0.25 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.
hAlways wear a safety helmet, goggles and ear protectors with CE mark during
drilling. Any local regulations that exist must also be observed.
hWhen 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.
hAlways take great care when using the machine. The working tool is subjected to
heavy loading and can break, with a risk of injury to personnel.
hCheck that the hoses used are of the right quality, and that all hose connections
are in good condition and properly tightened.
hBefore starting work on any of the systems, make sure that the air and water
systems are without pressure.
hMake sure that there are no concealed wires or other sources of electricity. Never
drill near any electric wires or other sources of electricity.
5

Operation
Using the rock drill for the first time
When the rock drill arrives from the factory, the inside of the tool is coated with
heavy oil to prevent corrosion.
After unpacking and installing the tool, pour a small amount of lubrication oil into
the air connection and operate the tool 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 FY250 lubricator connected to the air line.
Preparations before starting
1. Check the drilling equipment
hCheck that all of the drilling equipment is in good working order.
hCheck that the impact surface of the working tool shank is flat, with no signs of
wear.
hMake sure that the air inlet and exhaust ports are free from obstructions.
hCheck that the flushing holes in the working tool and drill bit are not blocked, and
that the flushing air/water flows through without obstruction.
hEnsure that the fittings are tight and leak-proof.
WARNING
Always check for damaged or loose hoses and fittings before operation.
Whipping hoses can cause serious injury.
2. Blow out the air hose
hEvery day before using the drill, blow out the air hose to clear it from
accumulated dirt and moisture.
3. Fill the lubricator with oil
Check the lubrication oil level, fill the lubricator if necessary.
Note! Check that the chuck and working tool shank are always covered by a film of
oil.
Note! Always use a recommended lubricant. Operation without lubrication is not
allowed.
Lubricant Recommendation
Air tool oil 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
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4. Air/water pressure and hose dimensions
Air pressure
Ensure that the compressor can deliver the required air pressure of 5 bar at the tool.
hHigh pressure (>6.3 bar) causes rough operation and damage.
hLow pressure (<4 bar) results in a slow drilling speed.
Water pressure
Make sure that the water pressure is set to around 3 bar.
Note! Maximum water pressure is 1 bar less than the working pressure. For
example if the air pressure is 5 bar, the water pressure must be below 4 bar
to prevent water entering the impact mechanism.
Note! Dry drilling is strictly prohibited. Operation without air- and water tubes is not
allowed as it will result in poor drilling performance.
Hose dimensions
The air hose diameter must be no less than 25mm. Inner diameter of connection
nipple and hose must be no less than 19mm. The ideal overall air hose length is
less than 15m.
Fitting and removing the tool
Before fitting the working tool
hCheck that the tool shank is of the correct size and length for the chuck used.
hThe shank must be clean and the tool must be in good condition.
hThe suitable quenching hardness of the shank is HRC48-53. Harder end face will
cause piston damaged and breakage of the end face of the piston. If the shank
face is too soft, it will be easily deformed by the piston, which will result in
difficulty in removing the working tool.
hShank end face shall be flat and perpendicular to the axis.
hRemove sharp edges from the shank's end face. Rough shank surface will cause
premature piston failure.
hInspect the bits: Dull bits will slow down the drilling speed and overstrain the drill
mechanism. When changing bits make sure that the new bit is the correct size to
follow your previous bore.
hBefore drilling check that the flushing hole in the working tool is not blocked.
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Fitting the working tool
1. Push the retainer outwards in the direction of the arrow (see picture below),
until the front portion of the retainer is able to accommodate the working tool
collar.
2. Insert the drill in the chuck.
3. When the drill bottoms, push back the retainer to lock it.
Removing the working tool
1. Push the retainer outwards in the direction of the arrow until the working tool
collar disengages from the front of the retainer.
2. Pull the working tool out.
3. Push back the retainer.
Attaching the pusher leg to the rock drill
hMount the pusher leg (1), lock sleeve (2), rubber pad (3), washer (4) and locking
nut (5) in the order shown in the picture below.
hTurn the locking nut clockwise with a wrench until you hear a "click".
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9
Controls
Throttle lever
The rock drill is equipped with a throttle lever for regulating both the compressed
air to the percussion mechanism and the flushing water.
A. Extra blowing, water flushing off, impact and rotation off.
B. Stop position, air and water off
C. Low throttle, air to pusher leg, water flushing
D. Medium throttle
E. Full throttle
Feed control
Adjust the feed force by means of the feed control lever as follows:
A. Pushing the lever in this direction will increase feed force.
B. Pulling the lever in this direction will decrease feed force
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Trigger
When the trigger (A) is pushed in, the feed force stops abruptly and the setting
on the feed control lever is overridden. The piston rod in the pusher leg retracts
automatically. This function is used for example to adjust the height of the rock
drill, when rigging up the pusher leg, or when there is a tendency to jam. When the
trigger is released, the feed control setting is activated again.
Oil regulating valve
Oil dosing is controlled by means of a screwdriver.
Check that sufficient lubrication is obtained by putting your hand in front of the
exhaust port while adjusting the regulating valve. If the hand is covered by a thin
film of oil after a few seconds, the lubricator has been correctly adjusted.
The amount of oil going into the rock drill increases when turning the valve counter
clockwise, and it decreases when turning the valve clockwise. Oil consumption is
2.5–6 ml/minute.
Note! Tighten the nut after regulation.
Note! To much oil will have negative effects on the operation whilst to little will
result in damage to parts as the temperature rises during operation.
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Drilling
Starting the rock drill
1. Open the main valve for compressed air.
2. Open the cock for the flushing water.
3. Adjust the feed control lever to give a suitable feed force for collaring the hole.
4. Align the rock drill so that the working tool touches the desired collaring point.
5. Move the throttle lever forward a little, which will start water flushing,
percussion and rotation.
6. Collar the hole with reduced feed force.
7. Move the throttle lever fully forward once the working tool has gained a
secure footing in the rock.
8. Adjust the feed force by means of the control lever so that the maximum
penetration rate is obtained.
Note! Do not bend the working tool as this will increase wear of the shank bushing
and piston. Furthermore, it can also affect drilling efficiency and increase the
risk of working tool breakage.
Stopping the rock drill
Pull the throttle lever backwards, which will stop percussion, rotation and flushing
water.
Re-positioning the pusher leg
1. Switch off the rock-drill percussion and flushing by means of the throttle lever.
2. Press the trigger, whereupon the piston rod is pulled back into the pusher-leg
cylinder automatically.
3. Re-position the pusher leg.
4. Release the trigger, whereupon the piston rod will move outwards again.
5. Move the throttle lever forward into the working position.
Note! The feed control lever does not need to be touched throughout this operation.
Blow-cleaning the drill hole
CAUTION
Move to the side and cover your eyes before starting to blow-clean the drill hole.
When blow-cleaning, particles and dirty flushing water can emerge at speed from
the drill hole.
hAlways wear impact resistant eye protection with side protection to avoid
injury.
hMake sure that no co-workers are in range when blow-cleaning.
If powerful blow-cleaning of the drill hole is required, turn the throttle lever fully
backwards beyond the stop position for extra blowing, whereupon the rock drill
stops. This can be done during drilling. When the drill hole is clean, turn the throttle
lever forwards again to re-start the rock drill.
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When you have finished drilling
Run the rock drill at medium speed when retracting the working tool from the
drilled hole.
Lay down the rock drill on a stone, wooden plank or similar object, so as to prevent
drill cuttings and other foreign matter from entering the chuck.
Turn off the water pressure before the air pressure. Run the rock drill for a few
seconds to clean out water and moisture after the water has been shut off.
Maintenance
Regular maintenance is a prerequisite for machine safety. Replace damaged and
worn components in good time. For a major service to the machine, contact your
nearest authorized workshop.
Check the machine and tools for wear and damage at regular intervals. Do not use
very worn or damaged tools.
When cleaning mechanical parts with a solvent, make sure that you comply with
current health and safety regulations and ensure that there is sufficient ventilation.
Daily maintenance, regular checking of wearing parts and carrying out repairs in
good time prevents breakdowns and increases the service life of the machine.
hAlways oil the rock drill and pusher leg well, before you put them into storage.
hStore in a clean and dry place.
hMake sure that no foreign matter enters the machine.
hProtect the chuck using a wooden plug or a clean piece of cotton waste.
hAlways hose down and wipe clean the rock drill and pusher leg after use.
hIn the case of long-term storage, pour a quantity of oil directly into the rock-drill's
air intake and then turn on the air briefly. This will protect the machine from
corrosion.
Selection of spare parts
This machine is a heavy-duty rock drill; there are strict requirements on selecting
spare parts. Use only genuine parts for replacement, to ensure stable performance.
Do not use pattern parts, which not only have a short working life but also cause
consequential damage to other parts, due to differing measurements and methods
of manufacturing.
Once a shift (after 8 hours of operation)
hCheck the wear in the chuck bushing. If the wear limit has been exceeded, the
working tool shank will wear more quickly, or become deformed. This will lead to
stoppages and increased working tool consumption.
hCheck the tightness of the side-bolt nuts.
The tightening torque shall be 80 Nm.
hCheck the rock drill's connection to the pusher leg.
hCheck the hoses, couplings and controls for leakage and damage.
hCheck that the rock drill and pusher leg are receiving enough lubrication. Fill the
lubricator as necessary.
hDrain the water separator.
hCheck the air and water pressure. Make sure that the water pressure is at least 1
bar lower than the air pressure.
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Once a week (after 40 hours of operation)
Carry out a basic check of all functions of the drilling equipment.
Once a month (after 200 hours of operation)
hSend the rock drill to a workshop for inspection. The local operating conditions
will determine whether or not this is a suitable interval for overhauling the drill.
hDismantle and clean the lubricator.
hClean out the water separator.
Measures to prevent freezing
In low ambient temperatures, ice can form in the machine. This can be avoided if
the water in the compressed air is removed. This can be done by equipping the air
lines with water separators and drainage points for water condensate.
If the rock drill ices up, it must not be heated to melt the ice. Let the ice thaw at
room temperature.
Note! Do not pour methylated spirits or similar substances into the rock drill, as
they will interfere with the lubrication and lead to increased wear.
Scrapping and waste disposal
Used and worn-out machines must be disposed of in such a way that as much of
the material as possible can be recycled and the impact on the environment is kept
to a minimum.
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Trouble shooting
Problem Cause Solution
Decreased
penetration rate
Air leakage in hoses,
couplings
Change packings, and where
required, change parts in the
throttle valve.
Shank sleeve Check the shank sleeve for
excessive wear. Replace if
necessary.
Air leakage due to worn
piston/cylinder
Replace the piston and/or cylinder
Air leakage due to worn
guide sleeve/pilot guide
Change the worn part
Insufficient feed
force
Piston rod seal (in pusher
leg) worn or deformed
Change the seal
O-rings on pusher leg
coupling worn or deformed
Change the o-rings
Poor rotation Splines of the rifle nut worn Replace the rifle nut if the splines
are worn
Splines of the rifle bar worn
down
Replace the rifle bar when needed
Splines on the piston worn
down
Replace the piston when needed
The toothing in the ratchet
housing is worn out
Replace the ratchet housing if the
tooth housing is so worn that the
pawls have difficulty catching
The toothing in the ratchet
wheel is worn out
Replace the ratchet wheel if the
toothing is so worn that the pawls
have difficulty catching
Chuck nut worn out Replace the chuck nut if the
splines have been worn to 1/2 of
the spline width
Pawls worn Replace all pawls, all pawl springs
and all pawl pins.
Uneven running Piston has seized in the
guide sleeve or the piston
guide
Replace the guide sleeve/piston
guide. If required, polish the
piston. Check the piston for heat
damage such as blue colouring
and/or fissures. If it is damaged
in this way, replace the piston as
well.
Dirty or damaged
main valve. Caused by
impurities or foreign matter
entering the drill with the
compressed air.
Clean and polish the valve
so that it seals against the
corresponding cylindrical and
plane sealing surfaces. If this is
not possible because the defects
are too serious, the valve must be
replaced.
Freezing. Caused by leakage
in the flushing system or
by excess water in the
compressed air or by
excessive water pressure
Check the flushing tubes and seals
and the water pressure. Drain
water from the compressed air
system. If the problem continues,
fit a water separator in the airline
system.
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Problem Cause Solution
Uneven running
(continued)
The side bolts are unevenly
or insufficiently tightened.
Can cause the various parts
to lose their alignment,
resulting in the seizure of the
movable parts. Abnormal
strains on the side bolt
may result in fracture at the
threads.
Check and repair any damage to
the contact points and tighten the
bolts with the correct tightening
torque
The drill gets
hot
Lack of oil Add oil and check that it runs
through. It is not sufficient that
there is oil in the exhaust air. There
must also be an oil coating on the
shank of the working tool.
Freezing High level of humidity in the
compressed air
Use water traps
Water pressure higher than
the air pressure
Lower the water pressure
Water pipe
breakage
Misalignment of the shank Change working tool or shank
sleeve or both
Damaged flushing hole in
the shank
Change working tool
Chipping of the
piston tip
Misalignment of the shank Change the working tool or shank
sleeve or both
Excessive wear of the piston
tip
Change piston
Spline breakage Lack of lubrication Lower the water pressure if it is
the same as or greater than the air
pressure
Increase lubrication or change oil
Dirt intrusion (specially
when drilling upwards)
Increase service intervals
Piston breakage Lack of lubrication Lower the water pressure if it is
the same as or greater than the air
pressure
Increase lubrication or change oil
Uneven tension in the side
bolts
Tighten the bolts correctly
Worn guide sleeve/piston
guide (can be confirmed by
the cushion test)
Change the worn part
Side bolt
breakage
Uneven tension on the bolts Tighten the bolts correctly
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Spare parts list and exploded drawing
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No. Description Quantity Product no. Product code
1 Spring 1 96000179 9605-1-3312310169
2 Pin 1 96000180 9605-1-3312310170
3 Conical pipe connector 1 96000186 9605-1-3312310176
4 Hoop 1 96000540 9605-1-3312310723
5 Wing nut 1 96000185 9605-1-3312310175
6 Pipe connector 1 96000187 9605-1-3312310177
7 Air pipe swivel 1 96000825 9600-1-3312310022
8 Air pipe nut 1 96000823 9600-1-3312310020
9 O-ring 2 96000486 9605-1-3312310633
10 Pad 1 96000174 9605-1-3312310164
11 Retaining ring 1 96000182 9605-1-3312310172
12 Water pipe connector 1 96000154 9603-1-3312310143
13 Water pipe nut 1 96000155 9603-1-3312310144
14 O-ring 2 96000482 9605-1-3312310627
15 O-ring 2 96000499 9605-1-3312310667
16 Water pipe connector retaining ring 1 96000156 9603-1-3312310145
17 Control valve 1 96000646 9605-1-3312311868
18 Control handle 1 96000152 9603-1-3312310141
19 Standard spring pad 1 96000534 9605-1-3312310716
20 Hex. thin nut 1 96000524 9605-1-3312310704
21 Fixing pin 1 96000177 9605-1-3312310167
22 Change valve 1 96000161 9603-1-3312310150
23 Retaining ring 1 96000160 9603-1-3312310149
24 Pressure regulating valve 1 96000119 9602-1-3312310101
25 Expansion 2 96000118 9602-1-3312310099
26 Spring 1 96000157 9603-1-3312310146
27 Conical spring 4 96000167 9605-1-3312310156
28 Ratchet pawl 4 96000166 9605-1-3312310155
29 Large seal sleeve 1 96000544 9605-1-3312310727
30 Seal sleeve 2 96000543 9605-1-3312310726
31 Right handle 1 96000163 9603-1-3312310152
32 Left handle 1 96000165 9603-1-3312310154
33 Shockproof handle 1 96000164 9603-1-3312310153
34 Trigger 1 96000162 9603-1-3312310151
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No. Description Quantity Product no. Product code
35 Elastic pin 1 96000527 9605-1-3312310708
36 Spring cover 1 96000169 9605-1-3312310159
37 Steel retaining ring 1 96000183 9605-1-3312310173
38 Spring 1 96000170 9605-1-3312310160
39 Rotation nut 1 96000146 9603-1-3312310135
40 Pad 1 96000184 9605-1-3312310174
41 Water valve body 1 96000171 9605-1-3312310161
42 Water valve 1 96000173 9605-1-3312310163
43 O-ring 2 96000489 9605-1-3312310642
44 Seal 1 96000181 9605-1-3312310171
45 Rubber pad 1 96000175 9605-1-3312310165
46 Back head 1 96000091 9605-1-3312310050
47 Water tube bush 1 96000835 9601-1-3312310035
48 Air tube pad 1 96000176 9605-1-3312310166
49 Ratchet 1 96000092 9605-1-3312310051
50 Dowel pin 1 96000839 9601-1-3312310039
51 Valve chest 1 96000093 9605-1-3312310052
52 Valve 1 96000094 9605-1-3312310053
53 Valve sleeve 1 96000639 9605-1-3312311860
54 Rifle bar 1 96000640 9605-1-3312311861
55 Rifle nut 1 96000095 9605-1-3312310056
56 Exhaust deflector 1 96000562 9605-1-3312311050
57 Hoop 1 96000542 9605-1-3312310725
58 Cylinder 1 96000641 9605-1-3312311862
59 Guide sleeve set 1 96000096 9605-1-3312310059
60 Piston 1 96000642 9605-1-3312311863
61 Hex. Thick nut 2 96000518 9605-1-3312310697
62 Side bolt 2 96000643 9605-1-3312311864
63 Air tube 1 96000644 9605-1-3312311865
64 Water tube 1 96000645 9605-1-3312311866
65 Front head 1 96000647 9605-1-3312311875
66 Rotation sleeve 1 96000648 9605-1-3312311876
67 Nonmetal hex. Locking nut 2 96000531 9605-1-3312310713
68 Steel retainer springs 2 96000818 9600-1-3312310013
69 Steel retainer bolt 2 96000634 9600-1-3312311820
70 Shank sleeve 1 96000168 9605-1-3312310157
71 Working tool retainer 1 96000635 9600-1-3312311821
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Atlas Copco Secoroc AB
Box 521, SE-737 25 Fagersta, Sweden
Phone: [phone]
E-mail: [email protected]
www.atlascopco.com
9852 3027 01a 2013.01