1. Komatsu Hydraulic Breakers
Komatsu Middle East
Parts Depot
Komatsu Hydraulic Breakers

2. Hydraulic breakers Applications Constructions Quarries Mines
Utility ,inside cities

3. Hydraulic breakers Which needs is a customer hammering into OUR head ?
One Face support
Solution
High Impact Energy
Reliability & Durability
Low running costs
Ecological

4. YES, Komatsu has it ! High impact Energy
Dual power source, hydraulic and gas
Long piston (stroke)
Less lost energy transfer by Same diameter (weight), piston & chisel
hydr. energy
Long piston (stroke)
gas energy
same diameter

5. Reliability & Durability Low running cost
YES, Komatsu has it !
Reliability & Durability
Low running cost
A unique and simple design leads to:
Only 2 moving parts
Fewer parts item, approx. 30% less
No internal accumulator !
Effect of gas cushion
Effect of unique side bolts
Effect of dust preventer

6. Effect of Unique Simple Structure
30% fewer parts than most other hammers
Reduce large volume of inventory parts for DB and end users
Reduce cost of repair and reassemble
Only Two Moving Parts
Control valve
Moves to change oil flow direction
Piston
Moves up and down in cylinder
Length ensures positive alignment with tool
Control Valve
Piston

7. Effect of unique side bolts
Side Bolt Nut
Rubber Cushion
Side Bolt Ring
Side Bolts (4)
Cylinder cover
Cylinder
Nut
Chisel holder
Helisert
`Competitor

8. Unique side bolts (Detail)
Small differences ? … big results !

9. Effect of dust preventer (same as others)
Piston
Chisel
Patm
Air P P
Air Intake Valve

10. Effect of gas cushion (Same as others)
Hydraulic Cushioning
Orifice on return side provides good hydraulic cushioning
Protecting carrier’s hydraulic system from pulse
Reducing the frequency of maintenance of Hy’d hammer
Hydraulic Cushion

11. Effect of Nitrogen Cushion Chamber (Unique)
Absorbing recoil energy of piston filled at Komatsu pressure
Reducing shock waves to carrier
Reducing stress on seals by low gas pressure
Easier maintenance compare to high/ low pressure chamber
N2 Gas Chamber

12. Hydraulic Breaker Trend
1st generation
Mechanical Spring Type (disappear)
2nd generation
- Hy’d & Gas system with Accumulator (still Common)
3rd generation
Hy’d & Gas system without Accumulator (Most recent)

13. First generation Mechanical Spring type
Steel spring installed in cylinder cover
Short life – tried many kinds of spring
Tried air spring type also

14. Second generation Accumulator type Accumulator installed
Filled Cushion gas in cylinder cover
Additional bush and seals

15. Second generation Accumulator type: advantages
Pulse absorbed by diaphragm
Low cushion gas ( Impact energy generated by hy’d pressure)
Impact energy directly affected by oil flow
Accumulator type: disadvantages
Increasing number of consumable parts
Life of consumable parts
Low impact energy when diaphragm broken
Maintenance of accumulator (Cause of closedown)
Accumulator easy damage due to pump performance improved (improper oil flow adjustment)

16. Third generation Non-Accumulator type
Eliminate accumulator to lower the failure rate
Decrease number of components
Easy maintenance

17. Third generation, Non-Accumulator type
Difficult points for development of Non-Accumulator type
A. How to Reduce the Pulse
Restriction in IN and OUT circuit
Accumulation of KNOW-HOW for degree of restriction
Limit pressure fluctuation by change of piston stroke & large Dia dimension
B. Holding Impact Energy
Adjustment of cushion gas
redesign hy’d circuit (improve efficiency)
C. Impact Efficiency
How to harness pressure energy efficiently under gas pressure from 3.5 to 8- 10kg/㎠
Adjustment of piston Dia

18. Rammer – Montabert - Furukawa – Krupp/Atlas – NPK
Competition
Rammer – Montabert - Furukawa – Krupp/Atlas – NPK

19. Type of Hammer Gas Only: NPK High Cushion Gas Pressure
High Recoil (High Vibration Value)
complicate to Refill Cushion Gas
Hydraulic + Gas: Komatsu, Krupp, Okada, Furukawa
Non Accumulator (Komatsu)
Easy to Refill Cushion Gas
Low Gas Pressure
Fewer Component Parts
Hydraulic Only: Montabert, Indeco
Need Big Accumulator
Impact Energy affected by PxQ directly
Low Recoil

20. Competitors NPK Manufactured in Japan
Installing Accumulator on carrier required at customer’s expense
Replacing a sleeve in a cylinder required
High Cushion Gas Pressure ( 2.4 ~ 2.7 Mpa)
100% reply on Gas Pressure ( Hammer doesn’t work without gas pressure. Komatsu hammers run at half power without gas pressure.)
Krupp
Manufactured in Germany
Accumulator installed on Hammer
Montabert
Manufactured in France
Market confused by Ingersoll Rand acquisition
Expensive component parts
Use big accumulator
Two speed as option (Called as Thinking Hammer), almost no need

21. Competitors Furukawa Manufactured in Japan Use Accumulator
Expensive component parts
Rammer
Manufactured in Finland
Complex structure and many moving components
Absorbing recoil energy by using springs & rubber buffer pad
Body swings in housing (Loss of energy and high wear)
Indeco
Manufactured in Italy
Low Unit Price
Known to have tool ( Chisel ) problems
Similar to Montabert Design

22. Competitors

23. PC200
Construction
Industry
Manufacturers
Association

24. CIMA
PC200/220

25. Product range
Introduced in Middle East

26. Jordan – PC350 / JTHB230

27. Ireland – Mc Hale
PC150 / JTHB100

28. Ireland – Mc Hale
PC150 / JTHB100

29. Bosnia – Herzegovina
TEIKOM
PC450 / JTHB65

30. Finland – SRO
PC27MR / JTHB30

31. Finland – SRO
PC228 / JTHB150

32. Ireland – Mc Candless
PC210 / JTHB190

33. Funzi Keys – Kenya
PC200 / JTHB150

34. Sweden – Swelog
PC340 / JTHB310

35. Croatia – TEIKOM
PC450 / JTHB310

36. Croatia – TEIKOM
PC340 / JTHB310

37. Iceland – Kraftvelar
PC340 / JTHB310

38. Germany – GP Baumaschinen
PC450 / JTHB310

39. Germany – GP Baumaschinen
PC450 / JTHB310

40. Remember … Thank you for your interest in this great product !
High Impact Energy
=> Dual Power source
Reliability & Durability
Low running costs
=> Simple & efficient design
=> Built on experience
=> No internal accumulator !
Back Pressure resistant
=> Fits on any excavator
Ecological