Toku TNB-08M User manual

Striker Hydraulic
Breaker
TNB-08M
TNB-1M
TNB-2M
TNB-3M
TNB-4M
TNB-5M
TNB-6M
TNB-6E
TNB-6.5E
TNB-7E
TNB-100
TNB-141LU
TNB-151LU
TNB-190LU
TNB-220LU
TNB-230LU
TNB-310LU
TNB-400LU
SERVICE MANUAL
TOKU AMERICA, INC.
Unsafe use of this machine may cause serious injury of death.
Operators and maintenance personnel must read this manual
before operating or maintaining this machine. This manual
should be kept near the machine for reference and periodically
reviewed by all personnel who will come into contact with it.
No.2

1

2
DELIVERY
INSTRUCTIONS

3

4
1．INTRODUCTION
The TNB Hydraulic Breaker is an attachment.
In order to operate the TNB Hydraulic Breaker to its full performance level, it is necessary to handle, maintain
and operate the hydraulic breaker properly. If this is not performed the life of the Hydraulic breaker will be
shorten dramatically and will lead to breakdowns.
When delivering the Hydraulic Breaker to the customer, it is necessary that the precaution points are
explained to the customer in detail.
Using this manual, adjust and perform final checks accordingly. Later, explain to the customer about
operation and maintenance for the hydraulic breaker properly.
2. BEFORE OPERATING THE TNB HYDRAULIC BREAKER, THE DELIVERY
PERSONAL OR INTRUCTOR SHOULD EXPLAIN ABOUT THE PERFORMANCE,
CONDITIONS & SETTINGS FOR THE EXCAVATOR.
１） Has the hydraulic oil and filter been changed.
２） Perform the flushing for the hydraulic breaker (attachment) as shown in the drawing below. Referring
to the chart below, proceed as advised.
Connect the IN & OUT hose,
and open the Stop valve.
Excavator Piping Flushing & Hammering time
New Manufacturer's genuine piping Over 5 mins.
New Piping installed later ( aftermarket) Over 30 mins.
Used Manufacturer's genuine piping Over 5 mins.
Used Piping installed later ( aftermarket) Over 30 mins.
３） Has the hydraulic oil been filled to the upper level of the tank (Boom on the excavator should be
lowered)
４） Has the relief valve pressure setting and pump performance been checked.
Stop valve
Relief valve
Piping for attachment Oil level gauge

5
５） Referring to the hydraulic breaker matching manual for excavators, if it has a Breaker mode (B-Mode),
set to the Breaker mode. For excavators that have computerized flow adjustment, please make sure
the maximum flow is set so that it does not exceed the maximum flow of the hydraulic breaker.
With regards to the adjustment of the computer, please have Maker’s service perform this adjustment.
６） With regards to excavators which do not have computerized flow adjustment, please refer to Sec. 7 of
this manual. In this case the throttle position must be set for the TNB hydraulic breaker and a sticker
must be applied at this position.
７） Checking the following areas; Lock nut for the relief valve, lock nut for the cable, split pin on the rod,
bolts and nuts on the piping flanges hydraulic hose adapters. All of the above must be secured and
tighten.
８） To check and confirm the movement of the hoses.
3. AFTER THE TNB HYDRAULIC BREAKER HAS BEEN MOUNTED, PERFORM A
TEST RUN.
1) When assembling the chisel, grease should be applied to the outside diameter.
2) Stand the hydraulic breaker up and press the chisel into the breaker before grease up.
3) If the hydraulic breaker is disassembled or assembled at a service facility, it will be necessary to release
all air and slowly supply hydraulic oil to the unit. (In this case lower the throttle position for the breaker,
press on the operating pedal about 5-6times,then operate the breaker at half throttle)
The operating time from removing the air to rhe preparation time is shown in the chart below.
Excavator
Air removal time Seal recovery time Preparation time Preparation time
(See Caution 1)
New unit 2 mins. 5 mins. Less than 50% Throttle
10 mins.
At 70% Throttle
20 mins.
After the hose has
been removed
2 mins. 5 mins. Less than 50% Throttle
10 mins.
At 70% Throttle
20 mins.
After the Breaker
has been repaired
4 mins. 10 mins. Less than 50% Throttle
10 mins.
At 70% Throttle
20 mins.

6
Caution 1) During the process of seal recovery, make sure
the hydraulic breaker does not impact when depressing the
operating pedal. Also, when performing the above exercise,
refer to the sketch below by standing the hydraulic breaker
vertically.
4. THE DELIVERY PERSONAL OR INSTRUCTOR SHOULD EXPLAIN THE
FOLLOWING POINTS TO THE CUSTOMER (MAINTENANCE STAFF OR OPERATOR)
1) The basic structure and mechanism for the TNB Hydraulic Breaker.
(Using the Instruction Manual)
2) The new hydraulic piping for the hydraulic breaker attachment and also the hydraulic circuit. (Operation,
High pressure hose, change valve, piping and relief valve etc)
3) Explanation concerning the operation,maintenance,wear parts and precaution points for the TNB
Hydraulic Breaker.
a) Inspection and re-tightening of nuts and bolts (Especially after 10 hours of operation)
b) Exchanging the hydraulic oil at every 600 hours of operation, in case the operating rate of the
breaker is 100%.
Exchanging the oil filter at every 150 hours of operation, in case the operating rate of the breaker is
100%.
c) Do not use a standard hydraulic breaker for underwater usage.
d) Procedures in greasing the chisel (Press the chisel into the breaker before greasing)
e) Operate the breaker vertically straight (A bending or prying action will during impact will break the
chisel)
f) Procedures for how to change the chisel.
g) How to store the breaker properly.
h) Agency of wear parts at an early stage and changing the parts accordingly. (Chisel, retainer pins,
retainer pin stopper, retainer pin stopper plug and hoses etc.)
4) Operation hour of the breaker on the first day should stay within 80% of the normal operating hours.

7
5. EXPLANATION ON TROUBLE SHOOTING
1) Terminology
a) Does not impact · · · · · · · · · This means the breaker does not operate.
b) Erratic blows · · · · · · · · · · · Breaker impacts without consistency.
c) Impacts but power is weak · · The normal impact strength is not transmitted to the breaker.
d) Oil leakage, Oil ooze
“ Oil leakage” is when the hydraulic oil leaks out continuously for several hours.
“ Oil ooze “ is when hydraulic oil is noticed after disassembly/assembly of the breaker within about
200 hours. The areas where you may notice this oil is around the mating areas, bolts and washers.
Or when the oil is unable to dry and dust is on the area and is unable to clear up or dry. In this case,
this is not abnormal.
At times oil leaking from the hose adapter may drip onto the hydraulic breaker body making it look
like oil is leaking. Take caution.
2) Explain using the Troubleshooting guide section in the Operation, Maintenance and Parts Manual.
3) Explain the Warranty clause for the Hydraulic breaker.
4) Periodic Maintenance
After operating the hydraulic breaker for 600 hours or 6 months, perform a check up for the breaker. Just like
your vehicle, periodic inspection and maintenance is a key factor in keeping your hydraulic breaker operating
for a long time.
6. FINAL INSPECTION SHOULD BE PERFORMED
1) Memo the Excavator Model
2) Memo the hour meter for the excavator
3) Apply the stickers to the appropriate areas.
7. ITEMS WHICH SHOULD BE GIVEN TO THE CUSTOMER
1) Instruction Manual
2) Tool Box (Explain the items which are in the tool box)
Explain how to open and close the stop valve when removing or mounting the breaker. Also about the hose
adapter plugs for the hose and for the excavator.
Take caution to avoid any foreign materials into the system through the hose and hose adapters.
The stickers

8
DISASSEMBLY &
ASSEMBLY
INSTRUCTIONS

9

10
CONTENT
Cleaning the Breaker and Bracket…………………………………………………………………….12
1. Disassembly of the bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2 – 1. Side Mount Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2 – 2. 1 PC Top Mount Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2 – 3. 2 PC Top Mount Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2 – 4. Silenced Bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2 – 5. Assembly / disassembly chart for the bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
2. Disassembly of the hydraulic breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3 – 1. Work table and set up of the breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3 – 2. Side bolt nut / Cylinder cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3 – 3. Piston . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3 – 4. Control valve box & valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3 – 5. Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3 – 6. Side bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3 – 7. Hose adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3 – 8. Removal of the seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
3 – 9. Assembly / disassembly chart for the Hydraulic breaker . . . . . . . . . . . . . . . . . . . . 26
3. Plugs torque chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
4. Inspection and Repair of the Hydraulic breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5 – 1. Seals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . 30
5 – 2. Chisel bushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
5 – 2 – 1. How to change the Chisel bushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
5 – 2 – 2. How to remove the Chisel bushing when a press is not available . . . . . . . . 33
5 – 3. Chisel holder bushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5 – 3 – 1. How to change the Chisel holder bushing . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
5 – 4. Control valve / Control valve box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5 – 5. Piston . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
5 – 6. Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
5 – 7. Retainer Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

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CONTENTS
6. Assembly of the Hydraulic breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6 – 1. Chisel holder bushing / Chisel bushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
6 – 1 – 1. Chisel holder bushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
6 – 1 – 2. Chisel bushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
6 – 2. Chisel holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
6 – 2 – 1. How to insert the Helisert . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
6 – 3. Side bolt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
6 – 4. Cylinder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
6 – 5. Piston . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6 – 6. Packing bushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
6 – 7. Control valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
6 – 8. Control valve box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
6 – 9. Filling Breaker with hydraulic oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
6 – 10. Cylinder cover / Side bolt nut . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
6 – 10 – 1. How to use the Power wrench . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
6 – 10 – 2. Alternative method of tightening the Side bolt nuts . . . . . . . . . . . . . . . . . . 61
6 – 11. Hose adapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
6 – 12. Checking & Re-charging the cushion chamber with Nitrogen gas . . . . . . . . . . . 64
7. Mounting the Hydraulic breaker onto a Excavator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
7 – 1. P – Q Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
7 – 2. Purpose of P – Q Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
7 – 3. How to measure the P – Q . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
7 – 4. How to set the Hydraulic breaker relief valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
7 – 5. How to set the Hydraulic breaker throttle position . . . . . . . . . . . . . . . . . . . . . . . . . 72
8. Removal / Assembly of the Chisel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
8 – 1. Removal of the Chisel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
8 – 2. Assembly of the Chisel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
9. Special work . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
9 – 1. How to change the Side bolt when broken . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

12
10. Hydraulic Breaker Disassembly / Assembly tools chart (For reference) . . . . . . . . . . . . . 77
1. Cleaning the Breaker and Bracket
To prevent any material from entering the breaker, before replacing parts or overhauling the breaker remove
all dirt and foreign material from the breaker and bracket.
2. Disassembly of the Bracket
2 – 1. Side Mount Bracket
1) Remove the bracket pin and bracket bushing. At this time remove the chisel from the breaker.
2) If there are hoses in the bracket, loosen and remove the hoses on the swivel side.
3) With the bracket bolt nut side of the bracket plate facing up, loosen the bracket bolt nut and remove.
4) Fit the “Eyebolt” onto the top of the plate and lift up the plate straight up.
5) Remove the breaker body the same as the above manner.
6) When assembling, perform this procedure in the opposite direction. But please note when the breaker is
being assembled into the bracket, make sure the bracket key plates fits into the breaker key slot
properly.
Bracket bolt nut
Key slot
Bracket
Bracket ring
Bracket bolt
Bracket pin
Bracket bushing
Washer
Eyebolt
Hyd.Hose (Within the bracket)

13
* Depending on the model, some changes may occur.
2 – 2. 1 PC Top Mount Bracket
1）Remove the bracket pin and bracket bushing. At this time remove the chisel from the breaker.
2）With the bracket bolt nut side of the bracket plate facing up, loosen the bracket bolt nut and remove.
3）Fit the “Eyebolt” onto the top of the plate and lift up the plate straight up.
4）Remove the breaker body the same as the above manner.
5）When assembling, perform this procedure in the opposite direction. But please note when the breaker is
being assembled into the bracket, make sure the bracket key plates fits into the breaker key slot
properly.
* Depending on the model, some changes may occur.
Bracket bolt nut
Key slot
Bracket
Bracket ring
Bracket bolt
Bracket pin
Bracket bushing
Washer
Eyebolt

14
2 – 3. 2 PC Top Mount Bracket
1) Remove the bracket pin and bracket bushing. At this time remove the chisel from the breaker.
2) Loosen the bolt of bracket (B) and remove the bracket (B).
3) With the bracket bolt nut side of the bracket plate facing up, loosen the bracket bolt nut and remove.
4) Fit the “Eyebolt” onto the top of the plate and lift up the plate straight up.
5) Remove the breaker body the same as the above manner.
6) When assembling, perform this procedure in the opposite direction. But please note when the breaker is
being assembled into the bracket, make sure the bracket key plates fits into the breaker key slot
properly.
Bracket ring
Bracket bushing
Bracket pin
Bracket(B)
Bracket bolt nut
Eyebolt
Bracket
Key slot
Bracket bolt
Washer

15
* Depending on the model, some changes may occur.
2 – 4. Silenced Bracket
1) Remove the bracket pin and bracket bushing. At this time remove the chisel from the breaker.
2) Loosen the hex bolt and nut, and remove the bracket (B), top rubber and cover plate.
3) Loosen the hard lock nut and remove the guide plate and guide
spacer.
Remove the hydraulic hose and fit the hose plug to prevent any
material from entering the breaker.
4) Assemble the “Eyebolt” and pull out the
breaker using a wire rope.
Cover plate
Silenced Bracket(A)
Top rubber/ plate
Bracket(B)
Bracket Pin
Guide spacer
Guide plate
Bracket bushing
Bracket ring
Guide plate
Hard lock nut
Eyebolt

16
5) Pull out the side spacer.
6) Pull out the chisel holder spacer.
7) Pull out the back spacer.
8) Pull out the under spacer A & B.
9) When assembling, perform this procedure in the opposite direction.
But please assemble the chisel holder spacer after assembling the side spacer.
(Assembly procedure of the spacer is 8), 7), 5), 6) )
Side spacer
Chisel holder spacer
Back spacer
Under spacer B
Under spacer A

17
* Depending on the Model, some changes may occur.
2 – 5. Assembly / Disassembly chart for the Bracket
Model TNB 08M 1M 2M 3M 4M 5M 6M 6E
(1) Bracket bolt/nut Width across flats (mm) 24 27 30 30 32 36 41 46
Bolt size (mm) (M16) (M18) (M20) (M20) (M22) (M24) (M27) (M30)
Torque (Ft. Lb./N·m) 130/176 188/255 253/343 253/343 304/412 433/588 650/882 723/980
(2) 2PC bracket Width across flats (mm) 24 24 24 24 24 24 30 30
bolt/nut Bolt size (mm) (M16) (M16) (M16) (M16) (M16) (M16) (M20) (M20)
Torque (Ft. Lb./Nm) 140/190 140/190 140/190 140/190 140/190 140/190 273/370 273/370
Silenced bracket Width across flats (mm) 24 24 24 24 24 24 30 30
bolt/nut Bolt size (mm) (M16) (M16) (M16) (M16) (M16) (M16) (M20) (M20)
Torque (Ft. Lb./N/·m) 140/190 140/190 140/190 140/190 140/190 140/190 273/370 273/370
(3) Hyd. hose Width across flats (mm) 19 27 27 27 27 27 27 36
IN/OUT Size (inch) 3/8 1/2 1/2 1/2 1/2 1/2 1/2 3/4
Torque (Ft. Lb./Nm) 36/49 43/59 43/59 43/59 43/59 43/59 43/59 87/118
(4) Guide bolt/nut Width across flats (mm) 19 24 24 24 24 24 24 30
Bolt size (mm) (M12) (M16) (M16) (M16) (M16) (M16) (M16) (M20)
Torque (Ft. Lb./N·m) 56/76 140/190 140/190 140/190 140/190 140/190 140/190 273/370
(5) Gas valve Width across flats (mm) - - - - - - - 17
cover plate Bolt size (mm) (M10)
Torque (Ft. Lb./Nm) 32/44
(6) Control valve Width across flats (mm) 17 17 19 19 19 19 19 24
plate Bolt size (mm) (M10) (M10) (M12) (M12) (M12) (M12) (M12) (M16)
Torque (Ft. Lb./Nm) 32/44 32/44 56/76 56/76 56/76 56/76 56/76 140/190
(7) Eyebolt for
Top/Side brackt Bolt size (mm) M8 M8 M8 M12 M12 M12 M12 M12
Eyebolt for Silenced
bracket Bolt size (mm) M10 M10 M12 M12 M12 M12 M12 M16
(8) Eyebolt for
cylinder cover Bolt size (mm) M8 M8 M8 M12 M12 M12 M12 M12
(9) Eyebolt for
chisel holder Bolt size (mm) - - - M12 M12 M12 M12 M12
(10)Eyebolt for
cylinder Bolt size (mm) M8 M8 M8 M12 M12 M12 M12 M12
(2)
(7)
(1)
(7)
(6) (2)
(4)

18
2 – 5. Assembly / Disassembly chart for the Bracket
Model TNB 6.5E 7E 100
141
LU
151
LU
190
LU
220
LU
230
LU
310
LU 400 LU
(1) Bracket Width across flats (mm) 46 55 55 60 65 75 75 90
bolt/nut Bolt size (mm) (M30) (M36) (M36) (M39) (M42) (M48) (M48) (M60)
Torque (Ft. Lb./Nm) 723/980 1012/1372 1012/1372 1192/1617 1445/1960 2024/2744 2024/2744 3614/4900
(2) 2PC bracket Width across flats (mm) 30 30 30 36 46 46 60 60
bolt/nut Bolt size (mm) (M20) (M20) (M20) (M24) (M30) (M30) (M39) (M39)
Torque (Ft. Lb./Nm) 273/370 273/370 273/370 480/650 930/1260 930/1260 2140/2900 2140/2900
Silenced
bracket Width across flats (mm) 30 30 30 36 46 46 60 60
bolt/nut Bolt size (mm) (M20) (M20) (M20) (M24) (M30) (M30) (M39) (M39)
Ttorque (Ft. Lb./Nm) 273/370 273/370 273/370 480/650 930/1260 930/1260 2140/2900 2140/2900
(3) Hyd. hose Width across flats (mm) 36 36 36 41 41 41 50 50
IN/OUT Size (inch) G3/4 G3/4 G3/4 G1. G1. G1. G1-1/4 G1-1/4
Tightening torque (Nm) 87/118 87/118 87/118 101/137 101/137 101/137 123/167 123/167
(4) Guide
bolt/nut Width across flats (mm) 30 30 30 36 46 46 46 46
Bolt size (mm) (M20) (M20) (M20) (M24) (M30) (M30) (M30) (M30)
Torque (Ft. Lb./Nm) 273/370 273/370 273/370 480/650 930/1260 930/1260 930/1260 930/1260
(5) Gas valve
cover Width across flats (mm) 19 19 19 19 19 19 19 19
plate Bolt size (mm) (M12) (M12) (M12) (M12) (M12) (M12) (M12) (M12)
Torque (Ft. Lb./N·m) 56/76 56/76 56/76 56/76 56/76 56/76 56/76 56/76
(6)Control valve
plate Width across flats (mm) 24 24 24 24 24 30 30 30
Bolt size (mm) (M16) (M16) (M16) (M16) (M16) (M20) (M20) (M20)
Torque (Ft. Lb./Nm) 140/190 140/190 140/190 140/190 140/190 273/370 273/370 273/370
(7) Eyebolt for
Top/Side
bracket
Bolt size (mm) M12 M20 M20 M20 M24 M24 M30 M30
Eyebolt for
Silenced
bracket
Bolt size (mm) M16 (Hook) (Hook) (Hook) (Hook) (Hook) (Hook) (Hook)
(8) Eyebolt for
cylinder cover Bolt size (mm) M20 M20 M20 M20 M24 M24 M30 M30
(9) Eyebolt for
chisel holder Bolt size (mm) M20 M20 M20 M20 M24 M24 M30 M30
(10)Eyebolt for
cylinder Bolt size (mm) M12 (M20) M20 M20 M24 M24 M30 M30
(1)
(7) (6)
(5)
(4)
(2)

19
3. Disassembly of the Hydraulic Breaker
3 – 1. Work table and set up of the Breaker
1) Remove the gas valve plug from the gas valve on the cylinder cover of the breaker.
2) Using a tool such as a screwdriver, push the valve in and completely remove all of the gas from the
cushion chamber.
3) Before removing the side bolt nut, first loosen the bolts on the control valve box.
4) Secure the hydraulic breaker, loosen the side bolt nut about 2-3mm from the fastening surface.
5) Fit the “Eyebolt”onto the cylinder cover and lift the breaker up. Lower the breaker onto a breaker stand or
a breaker locater so that the breaker does not fall over.
Gas valve plug
Driver
Gas valve body
Gas valve
Control valve box
Loosen the bolts
Loosen about 2 – 3mm
Make sure the pivot is welded
securely and does not remove.
Breaker stand Breaker locater