PERMON s.r.o.

tel: +420 (0)313 558145

Roztoky +420 (0)313 558271-4
27023 Křivoklát fax: +420 (0)313 558313
CZECH REPUBLIC email: export@permon.cz
www.permon.cz
Design, manufacture, sales & service
of pneumatic tools
SEIT 1826 - SINCE 1826

OPERATION AND MAINTENANCE MANUAL

BK 20, BK 25, BK 30, BK40
BKA 20, BKA 25, BKA 30, BKA40

IMPORTANT SAFETY INFORMATION ENCLOSED. READ THIS MANUAL BEFORE

OPERATING TOOL.
IT IS THE RESPONSIBILITY OF THE EMPLOYER TO PLACE THE INFORMATION IN
THIS MANUAL INTO THE HANDS OF THE OPERATOR.
FAILURE TO OBSERVE THE FOLLOWING WARNINGS COULD RESULT IN
INJURY.
BK20, BK25, BK30, BK40, BKA 20, BKA25, BKA 30 and BKA40 Paving Breakers are designed for the
disintegration of low to medium strength materials (e.g. concrete, masonry bituminous asphalt etc). The
tool is intended for vertical or inclined downward breaking.

Permon is not responsible for customer modifications of tools for applications on which Permon was not
consulted.

PLACING TOOL IN SERVICE

• Always operate, inspect and maintain this tool in accordance with all regulations (local, state, federal and
country), hat may apply to hand held/hand operated pneumatic tools.
• For safety, top performance, and maximum durability of parts, operate this tool at 7.0 bar/700 kPa
maximum air pressure at the inlet with 3/4” (19 mm) inside diameter air supply hose.
• Always turn off the air supply and disconnect the air supply hose before installing, removing or adjusting
any accessory on this tool, or before performing any maintenance on this tool.
• Do not use damaged, frayed or deteriorated air hoses and fittings.
• Be sure all hoses and fittings are the correct size and are tightly secured.
• Always use clean, dry lubricated air at 7.0 bar/700 kPa maximum air pressure. Dust, corrosive fumes
and/or excessive moisture can ruin the motor of an air tool.
• Do not lubricate tools with flammable or volatile liquids such as kerosene, diesel or jet fuel.
• Do not remove any labels. Replace any damaged label.

USING THE TOOL

• Always wear eye protection when operating or performing maintenance on this tool.
• Always wear hearing protection when operating this tool.
• Keep hands, loose clothing and long hair away from rotating end of tool.
• Anticipate and be alert for sudden changes in motion during start up and operation of any power tool.
• Keep body stance balanced and firm. Do not overreach when operating this tool.
• Tool accessories may continue to impact briefly after throttle is released.
• Air powered tools can vibrate in use. Vibration, repetitive motions or uncomfortable positions may be
harmful to your hands and arms. Stop using any tool if discomfort, tingling feeling or pain occurs. Seek
medical advice before resuming use.
• Use accessories recommended by Permon.
• This tool is not designed for working in explosive atmospheres.
• This tool is not insulated against electric shock.

The use of other than genuine Permon replacement parts may result in safety hazards, decreased tool
performance, and increased maintenance, and may invalidate all warranties.
Repairs should be made only by authorised trained personnel. Consult your nearest Permon authorised
service center.

SPECIFIC WARNINGS
• Always wear eye protection when operating or performing maintenance on this tool.
• Always wear hearing protection when operating this tool.
• Always turn off the air supply and disconnect the air supply hose before installing, removing or adjusting
any accessory on this tool, or before performing any maintenance on this tool.
• Do not use damaged, frayed or deterlorated air hoses and fittings.
• Air powered tools can vibrate in use. Vibration, repetitive motions or uncomfortable positions may be
harmful to your hands and arms. Stop using any tool is discomfort, tingling feeling or pain occurs. Seek
medical advice before resuming use.
• Do not carry the tool by the hose.
• Keep body stance balanced and firm. Do not overreach when operating this tool.
• Operate at 7.0 bar/700 kPa maximum air pressure)
• When wearing gloves and operating models with inside trigger, always be sure that the gloves will not
prevent the trigger from being released.
• Wear safety shoes, hard hat, safety goggles, gloves, dustmask and any other appropriate protective
clothing while operating the tool.
• Do not indulge in horseplay. Distraction can cause accidents.
• Keep hands and fingers away from the throttle lever until it is time to operate the tool.
• Never rest the tool or chisel on your foot.
• Never point the tool at anyone.
• Compressed air is dangerous. Never point an air hose at yourself or co–workers.
• Never blow clothes free of dust with compressed air.
• Be sure all hose connections are tight. A loose hose not only leaks but can come completely off the tool
and while whipping under pressure, can injure the operator and others in the area. Attach safety cables to
all hoses to prevent injury in case a hose is accidentally broken.
• Never disconnect a pressurised air hose. Always turn off the air supply and bleed the tool before
disconnecting a hose.
• The operator must keep limbs and body clear of the chisel. If a chisel breaks, the tool with the broken
chisel projecting from the tool will suddenly surge forward.
• Do not ride the tool with one leg over the handle. Injury can result if the chisel breaks while riding the
tool.
• Know what is underneath the material being worked. Be alert for hidden water, gas, sewer, telephone or
electric lines.
• Use only proper cleaning solvents to clean parts. Use only cleaning solvents which meet current safety
and health standards. Use cleaning solvents in a well-ventilated area.
• Do not flush the tool or clean any parts with diesel fuel. Diesel fuel residue will ignite in the tool when the
tool is operated, causing damage to internal parts. When using models with outside triggers or throttle
levers, take care when setting the tool down to prevent accidental operation.
• Do not operate the tool with broken or damaged parts.
• Never start the tool when it is lying on the ground.
• This tool is not designed for working in explosive atmospheres.
• This tool is not insulated against electric shock.

OPERATION

Lubrication
This tools are fitted with built-in oilers to ensure propper lubrication. Refill the oil reservoir beginning of
each shift and every 4 hours working with the tool.
• Switch off the air outlet of the compressor. Disconnect the hammer from the air hose.
• Slowly (in the oiler reservoir can be a certain residual pressure) screw out oil fill plug (39) and pour oil
into the reservoir (about 25 mm under reservoir top margin).
• Check sealing O-ring (38) and replace it if damaged. Screw in the oil fill plug (39) and tighten it properly.

Recommended environmentally friendly oils:

SETUZA PRIMOL EKO PNEU
BP BIOHYD SE46
ÖMV BIOHYD M 32
TOTAL HYDROBIO 46

Before storing the tool or if the tool is to be idle for a period exceeding twenty-four hours, pour about 3 cc
of mineral oil into the air inlet and operate the tool for 5 seconds to coat the internal parts with oil.

Air Supply and Connections

Always use clean, dry air. Dust, corrosive fumes and/or excessive moisture can ruin the motor of an air
tool. An air line filter can greatly increase the life of an air tool. The filter removes dust and moisture.
Make sure all hoses and fittings are the correct size and are tightly secured.
The tool is shipped from the factory with 3/4” G male inlet thread.

Accessory Installation
Always turn off the air supply and disconnect the air supply hose before installing, removing or adjusting
any accessory on this tool or before performing any maintenance on this tool. Failure to do so could result
in injury.
1. Operate the Latch until it is approximately 90 degrees to the body of the tool and clicks into position.
2. Insert the accessory into the tool until the collar of the accessory is past the Latch.
3. Operate the Latch until it is parallel to the tool and it clicks into position.
4. 15 – 20 kg is the recommended amount of downforce to apply to the tool when working. The amount of
downforce is correct when the tool hits rhythmically, is comfortable to hold and works efficiently.

• Do not repair the tool at the work site. Always take the tool to a repair shop. Never drag the tool on the
ground. The air port and other openings will become clogged with dirt and debris.
• Compressed air is dangerous. When blowing the line clear of dirt, wear eye protection and keep the air
line directed toward a safe, clear area.
• Always blow out the air line before using to clear the line of dirt.
• Do not operate the tool unless the chisel is against the work since this will cause premature wear of parts
and reduce the vibration isolation properties of the tool.
• Always break material to the point of “give.” Cracking does not result in a complete break. Clear away
rubble as it is broken since uncleared rubble blocks the point of “give.”
• Always take the right size “bite” with the tool. When working new material, experiment to find the right
size “bite” required for breaking that material efficiently.
• If “bites” are too big, the operator will try to pry with the tool. This could break the chisel.
• The tool is designed for demolition, not prying. Always use a pick for prying. If “bites” are to small, the
operator will be working too slowly.
• If the chisel or accessory should become stuck, do not use excessive force or mechanical means on the
tool to pull out the chisel. Doing so will damage the vibration isolation unit. Break out the stuck chisel with
a spare chisel or tool.

DISASSEMBLING THE PAVING BREAKER

General Instructions
• Clean the breaker outer surface.
• Do not disassemble the breaker any further than necessary to replace or repair damaged or worn parts.
• Whenever grasping a breaker or a part in a vice, always use leather or copper-covered vice jaws to
protect the surface of the part and help prevent distortion. Take extra care with threaded parts and
housings.
• Do not remove any part that is a press fit in or on a subassembly unless the removal of the part is
necessary for repairs or replacement.
• Do not disassemble the breaker unless a complete set of and O-rings is available for replacement.

Fronthead disassembly
Remove nut (25) and fronthead pinch bolt (24) from the fronthead (3). Lightly tap the fronthead (using a
hide mallet if necessary) from the cylinder (1).
Press or drift out the two fronthead spring pins (22, 23) and remove the latch (6).
The plunger (20) and the plunger spring (21) can be removed from the fronthead.
Handle Disassembly
Using a hide mallet tap loose and remove the muffler (29) and the muffler ring (32) from the cylinder.
Firmly grip the cylinder upright in a vice with leather or copper covered jaws.
Loosen the four-handle nuts (27), unscrew and remove the four handle screws (26).
Lift the handle assembly (5) or (42) from the cylinder (1) (tap with a hide mallet if necessary).
For BKA (vibration damped) models only:
Press or tap out the handle pivot pin (12), remove both handle levers (8 and 9) from the handle body (5)
together with the trigger (7). Tap out the sleeve (13) to detach the handle levers from each other. Remove
the handle springs (11) from the handle body (5). If it is necessary to remove the handle lever stop (14),
use a punch of a suitable size (15 – 19 mm) and drift the stop out from the cylinder side.
It is possible to remove the trigger pin (15) at this stage if required.
Unscrew the inlet bushing (18), and remove trigger spring (17) the trigger ball (16) and throttle pin (15).
Unscrew and remove the oiler plug (39) and sealing washer (38) and drain the oil in the reservoir into a
suitable receptacle for safe disposal.
Pry out the wick plug (37) from the base of the handle casting. Inspect the wick (36) and wick holder (35) if
clean and remove if necessary.
Cut off the old handle grips (10) if they are to be replaced.
For BK (standard handle) models only: Drift or press out the spring pin (45) and remove the trigger
lever (44) The trigger pin (46) may be removed at this stage if required.
Removal of the handle bar (43) from the casting (42) should not normally be necessary. If it is necessary
cut off the handle grips (10) and drift or press out spring pin (48). Securely support the handle body (42)
beneath a press and using a suitably sized pressing bar press out the handle bar (43) from the handle
body (42).
Unscrew the inlet bushing (18), and remove trigger spring (17), trigger ball (16) and trigger pin (46).
Unscrew and remove the oiler plug (39) and sealing washer (38) and drain the oil in the reservoir into a
suitable receptacle for safe disposal.
Pry out the wick plug (37) from the base of the handle casting. Inspect the wick (36) and wick holder (35) if
clean and remove if necessary.
Remove the handle grips (10) if they are to be replaced it may prove easier to cut the grips off.
Cylinder Disassembly
Remove the spacing washer (30) and valve plate (31). Slide valve ring (34) from cylinder (1). Remove
sealing ring (28).
Release the cylinder from the vice, invert and allow the piston (4) to slide out and be caught.
The nozzle (2) is pressed in the cylinder and retained with Loctite 601 – do not disassemble unless
replacement is necessary.
The cushion bushing (33) is pressed in the cylinder – do not disassemble unless replacement is
necessary.

ASSEMBLY OF THE PAVING BREAKER

General Instructions
• Before assembly of the breaker, clean all parts thoroughly and lubricate surfaces with a thin film of
recommended oil (see Lubrication).
• Apply a film of O-ring lubricant to all O-rings before final assembly.
• It is recommended that the assembling of the nozzle (2) should be carried out by the manufacturer or
authorised distributor.
• The existence of a piston air cushion should be determined. Hold the cylinder vertically and allow the
piston to drop down the bore small diameter first. An air cushion is present if the piston “bounces” at the
bottom of the cylinder and no metal to metal contact noise can be heard. If a cushion is not present
contact your authorised Permon repair centre for advice.
Cylinder Assembly
Grip the cylinder (1) vertically in a vice protected with leather or copper covered vice jaws.
Lubricate and insert the piston (4) small end first into the bore. - Check for cushion.
Lubricate and slide the valve ring (34) onto the cylinder (1) and replace valve cover (31).
Position the valve spacer (30) on top of the valve cover (31).
Replace the sealing ring (28).
Handle Assembly
BKA (vibration damped) models only:
If the handle stop (14) was removed during disassembly it should be replaced with a new part as the
retaining feature is destroyed upon removal. Locate the stop in the hole in the handle casting and tap the
stop sharply into place using a soft drift and hammer.
If the hand grip rubbers (10) were removed these may now be replaced. Lubricate the inside of the rubber
with soapy water and slide the new rubbers into position.
Assemble left and right hand grips (8 and 9), trigger (7) together with sleeve (13) , lubricate around the
pivot area with oil, and position the sub-assembly in the slot in the handle body (5).
Locate the handle springs (11) in place beneath the hand grip assembly, compress the springs slightly
and fix the whole assembly in place by drifting or pressing the handle pivot pin (12).
Lubricate and slide trigger pin (15) into position in the handle casting, replace trigger ball (16) trigger
spring (17) and replace air inlet bushing (18) apply thread retainer (Loctite 243, or similar) to the threads.
Tighten the inlet bushing to a torque of 200Nm (147ft.lbs) torque.
Note. The trigger pin has a reduced diameter, which is placed next to the trigger ball.
Check that the handles and trigger move freely.
Assemble wick (36) in wick holder (35) and slide the assembly into position in the handle body casting.
Retain the assembly in position by pressing in the wick plug (37).
Refill the oil reservoir with clean air tool lubricant and replace the seal (38) and oil fill plug (39) hand
tighten only.
BK (standard handle) models only:
If the handle bar (43) was disassembled from the handle body (42) it should now be replaced. Securely
support the handle body (42) beneath a press and position the handle bar (43) in the mating hole.
Note: Ensure that the handle bar has the correct orientation and is aligned to accept the trigger pin (45)
when pressed home.
Press the handle bar home to depth until the lock pin hole is aligned.
Press or drift in the lock spring pin (48).
Lubricate and slide the trigger pin (46) into position in the handle casting, replace trigger ball (16), trigger
spring (17) and replace inlet bushing (18) apply thread retainer (Loctite 243, or similar) to the threads.
Tighten the inlet bushing to a torque of 200Nm (147ft.lbs) torque.
Note. The trigger pin has a reduced diameter, which is placed next to the trigger ball.
Position trigger lever (44) and secure in place with spring pin (45) Check the trigger moves freely.
Assemble wick (36) in wick holder (35) and slide the assembly into position in the handle body casting.
Retain the assembly in position by pressing in the wick plug (37).
Refill the oil reservoir with clean air tool lubricant and replace the seal (38) and oil fill plug (39) hand
tighten only.
If the hand grip rubbers (10) were removed these may now be replaced. Lubricate the inside of the rubber
with soapy water and slide the new rubbers into position.
Main Assembly
Lightly grip the cylinder assembly vertically in a vice and position the handle assembly in place.
Note that it is usual to orientate the trigger lever and air inlet 180 degrees from the fronthead bolt groove in
the cylinder.
Replace the four handle screws (26) use new handle nuts (27) and tighten down evenly to a torque of 90
Nm torque.
Remove the cylinder and handle assembly from the vice.
Assemble muffler ring (32) in muffler (29) and replace the assembly by tapping the muffler fully home
using a hide mallet.
Fronthead Assembly
Apply a coating of grease, then replace spring (21) and plunger (20) in position in fronthead (3).
Position the latch (6) in its slot and secure in place by drifting or pressing in outer spring pin (23). Position
then press or drift home inner spring pin (22).
Replace fronthead assembly onto cylinder and aligning pinch bolt hole with the cylinder groove.
Replace pinch bolt (24) and nut (25) and tighten a torque of 90 Nm (66.4 lb.ft) torque.
Assembly Checks
Following service the breaker should be checked for correct operation prior to being released back to the
job site.
Fit the correct size accessory into the breaker and connect to an airline. Using air at low pressure 2 bar,
check that the breaker is free from air leaks around the inlet connection and that the breaker does not
automatically start to operate without the trigger being depressed.
Increase the air pressure to 6 bar and run the tool in short bursts to check the tool operates correctly and
stops and starts cleanly without hesitation.
SPECIFICATIONS:

BKA 20 BKA 25 BKA 30 BKA 40

Weight kg 21 25 30 40

Length mm 640 640 730 800

Width mm 455 455 455 455

Max. Working Pressure bar 7 7 7 7

3
Air Consumption m /min 1,4 1,4 1,8 2,0

Impact Rate 1/min 1260 1320 1200 960

25 hex. x 108
25 hex. x 108 28 hex. x 160 28 hex. x 160
Chuck Size mm 28 hex. x 160
28 hex. x 160 32 hex. x 160 32 hex. x 160
32 hex. x 160
2
Vibration Level m/s 2,5 3,4 3,5 3,5

Guarranteed Noise Level LWA 105 106 110 110

BK 20 BK 25 BK 30 BK 40

Weight kg 21,5 25,5 30,5 40,5

Length mm 640 640 730 800

Width mm 441 441 441 441

Max. Working Pressure bar 7 7 7 7

3
Air Consumption m /min 1,4 1,4 1,8 2,0

Impact Rate 1/min 1260 1320 1200 960

25 hex. x 108
25 hex. x 108 28 hex. x 160 28 hex. x 160
Chuck Size mm 28 hex. x 160
28 hex. x 160 32 hex. x 160 32 hex. x 160
32 hex. x 160
2
Vibration Level m/s 11,5 11,1 8,8

Guarranteed Noise Level LWA 105 106 110 110

SPARE PARTS LIST BKA20, BKA25, BKA30, BKA40:

Ref. Part No. Part Name Qty.

x Breaking Hammer BKA 20
x Breaking Hammer BKA 25
x Breaking Hammer BKA 30
x Breaking Hammer BKA 40
1 8323980 8324180 - - Cylinder Assembly 25x108 1
1 8323990 8324190 8323771 8323931 Cylinder Assembly 28x160 1
1 - 8324200 8323712 8323821 Cylinder Assembly 32x160 1
2 2090691 2090691 - - Nozzle 25x108 1
2 2090820 2090740 2090740 2090740 Nozzle 28x160 1
2 - 2090701 2090701 2090701 Nozzle 32x160 1
33 2005341 2005312 2005322 2005322 Inner Piece 1
3 8330030 8330030 - - Cylinder Cover Assembly 25x108 1
3 8330050 8330010 8330010 8330010 Cylinder Cover Assembly 28 & 32x160 1
3 5132210 5132210 - - Cylinder Cover 25x108 1
3 5132280 5132200 5132200 5132200 Cylinder Cover 28 & 32x160 1
6 5256083 5256083 5256083 5256083 Latch 1
20 0900570 900570 0900570 0900570 Pin 1
21 315138 315138 315138 315138 Spring 1
22 311409 311409 311409 311409 Pin Inner 1
23 311407 311407 311407 311407 Pin Outher 1
24 309332 309332 309332 309332 Screw 1
25 311327 311327 311327 311327 Nut 1
4 5003740 5003630 5003650 5003680 Piston 1
5 8017300 8017300 8017300 8017300 Handle Assembly Oiler 1
5 5259980 5259980 5259980 5259980 Handle Body Oiler 1
7 1418280 1418280 1418280 1418280 Trigger 1
8 1418311 1418311 1418311 1418311 Handle Lever Left 1
9 1418301 1418301 1418301 1418301 Handle Lever Right 1
10 1318100 1318100 1318100 1318100 Handle Grip 2
11 315152 315152 315152 315152 Handle Spring 2
12 311398 311398 311398 311398 Handle Pivot Pin 1
13 2001580 2001580 2001580 2001580 Sleeve 1
14 0901880 0901880 0901880 0901880 Handle Lever Stop 1
15 3083192 3083192 3083192 3083192 Trigger Pin 1
16 722087 722087 722087 722087 Trigger Ball 1
17 315150 315150 315150 315150 Trigger Spring 1
18 4087330 4087330 4087330 4087330 Threaded Socket 3/4" 1
19 414259 414259 414259 414259 Quick Coupling 3/4" 1
35 722017 722017 722017 722017 Wick Body 1
36 722018 722018 722018 722018 Wick 1
37 273028 273028 273028 273028 Wick Plug 1
38 273030 273030 273030 273030 Seal 1
39 0047090 0047090 0047090 0047090 Oil Fill Plug 1
26 309339 309339 309339 309101 Screw 4
27 311420 311420 311420 311420 Nut 4
28 273385 273385 273385 273385 O-Ring 1
29 1730240 1730240 1730240 1730280 Damper 1
30 273384 273384 273384 273384 Ring 1
 Ref. Part No. Part Name Qty.
x Breaking Hammer BKA 20
x Breaking Hammer BKA 25
x Breaking Hammer BKA 30
x Breaking Hammer BKA 40
31 1511390 1511331 1511341 1511340 Cover 1
32 0913410 0913410 - - Damper Ring 1
34 3908150 3908100 3908110 3908110 Distribution Ring 1
40 0911710 - - - Washer 4
40 - - 311079 311079 Steel Washer 2
47 - - 722015 722015 Plastic Washer 2

41 9950120 9950120 9950120 9950120 Latch Kit 0

6 5256083 5256083 5256083 5256083 Latch 1
20 0900570 900570 0900570 0900570 Pin 1
21 315138 315138 315138 315138 Spring 1
22 311409 311409 311409 311409 Pin Inner 1
23 311407 311407 311407 311407 Pin Outher 1
24 309332 309332 309332 309332 Screw 1
25 311327 311327 311327 311327 Nut 1
SPARE PARTS LIST BK20, BK25, BK30, BK40:

Ref. Part No. Part Name Qty.

x Breaking Hammer BK 20
x Breaking Hammer BK 25
x Breaking Hammer BK 30
x Breaking Hammer BK 40
1 8323980 8324180 - - Cylinder Assembly 25x108 1
1 8323990 8324190 8323771 8323931 Cylinder Assembly 28x160 1
1 - 8324200 8323712 8323821 Cylinder Assembly 32x160 1
2 2090691 2090691 - - Nozzle 25x108 1
2 2090820 2090740 2090740 2090740 Nozzle 28x160 1
2 - 2090701 2090701 2090701 Nozzle 32x160 1
33 2005341 2005312 2005322 2005322 Inner Piece 1
3 8330030 8330030 - - Cylinder Cover Assembly 25x108 1
3 8330050 8330010 8330010 8330010 Cylinder Cover Assembly 28 & 32x160 1
3 5132210 5132210 - - Cylinder Cover 25x108 1
3 5132280 5132200 5132200 5132200 Cylinder Cover 28 & 32x160 1
6 5256083 5256083 5256083 5256083 Latch 1
20 0900570 900570 0900570 0900570 Pin 1
21 315138 315138 315138 315138 Spring 1
22 311409 311409 311409 311409 Pin Inner 1
23 311407 311407 311407 311407 Pin Outher 1
24 309332 309332 309332 309332 Screw 1
25 311327 311327 311327 311327 Nut 1
4 5003740 5003630 5003650 5003680 Piston 1
42 8017320 8017320 8017320 8017320 Handle Assembly Oiler 1
42 5259990 5259990 5259990 5259990 Handle Body Oiler 1
10 1318100 1318100 1318100 1318100 Handle Grip 2
16 722087 722087 722087 722087 Trigger Ball 1
17 315150 315150 315150 315150 Trigger Spring 1
18 4087330 4087330 4087330 4087330 Inlet Bushing 1
19 414259 414259 414259 414259 Quick Coupling EU 1
35 722017 722017 722017 722017 Wick Body 1
36 722018 722018 722018 722018 Wick 1
37 273028 273028 273028 273028 Wick Plug 1
38 273030 273030 273030 273030 Seal 1
39 0047090 0047090 0047090 0047090 Oil Fill Plug 1
43 3080110 3080110 3080110 3080110 Handle Bar 1
44 1418200 1418200 1418200 1418200 Trigger 1
45 311005 311005 311005 311005 Spring Pin 1
46 3083201 3083201 3083201 3083201 Trigger Pin 1
48 311429 311429 311429 311429 Quick Coupling 3/4" 1
26 309339 309339 309339 309101 Screw 4
27 311420 311420 311420 311420 Nut 4
28 273385 273385 273385 273385 O-Ring 1
29 1730240 1730231 1730240 1730280 Damper 1
30 273384 273384 273384 273384 Ring 1
31 1511390 1511331 1511341 1511340 Cover 1
32 0913410 - - - Damper Ring 1
34 3908150 3908100 3908110 3908110 Distribution Ring 1
Ref. Part No. Part Name Qty.
x Breaking Hammer BK 20
x Breaking Hammer BK 25
x Breaking Hammer BK 30
x Breaking Hammer BK 40
40 0911710 - - - Washer 4
40 - - 311079 311079 Steel Washer 2
47 - - 722015 722015 Plastic Washer 2

41 9950120 9950120 9950120 9950120 Latch Kit 0

6 5256083 5256083 5256083 5256083 Latch 1
20 0900570 900570 0900570 0900570 Pin 1
21 315138 315138 315138 315138 Spring 1
22 311409 311409 311409 311409 Pin Inner 1
23 311407 311407 311407 311407 Pin Outher 1
24 309332 309332 309332 309332 Screw 1
25 311327 311327 311327 311327 Nut 1
BK 20
BKA 20
BK 25
BKA 25
BK 30
BKA 30
BK 40
BKA 40