Komatsu Middle East
Parts Depot

Hydraulic breakers
Applications

Constructions

Quarries

Mines

Utility
,inside cities
KME Parts Depot

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

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) same diameter gas energy
KME Parts Depot

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
KME Parts Depot

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
1.
Control valve
Control Valve
Moves to change oil flow direction
2.
Piston
Piston
Moves up and down in cylinder
Length ensures positive alignment with tool
KME Parts Depot

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

Unique side bolts
(Detail)
KME Parts Depot
Small differences ? … big results !

Effect of dust preventer (same as others)
Piston
P atm
Air
P
Air Intake Valve
P
Chisel
KME Parts Depot

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
KME Parts Depot

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
N2 Gas Chamber pressure chamber
KME Parts Depot

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

First generation
Mechanical Spring type

Steel spring installed in cylinder cover

Short life – tried many kinds of spring

Tried air spring type also
KME Parts Depot

Second generation
Accumulator type

Accumulator installed

Filled Cushion gas in cylinder cover

Additional bush and seals
KME Parts Depot

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)
KME Parts Depot

Third generation
Non-Accumulator type

Eliminate accumulator to lower the failure rate

Decrease number of components

Easy maintenance
KME Parts Depot

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
KME Parts Depot

Competition
Rammer – Montabert - Furukawa – Krupp/Atlas – NPK
Difference in concept
Item Rammer Montabert Furukawa Krupp/Atlas Komatsu NPK Komatsu Advantage
Energy source
Gas only
Hyd. Oil only
Gas+Hyd. Oil
Gas Cushion
O
No
O
No
O
Yes
O
Yes
O
Yes
O * Less dependence on Hyd. Oil
* Elimination of accumulator
* Cushion effect by Gas
Yes * Less affect to carrier
* Longer product life
* Less maintenence
Accumulator
(integrated)
Yes Yes Yes Yes No No * Less maintenence
KME Parts Depot

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
KME Parts Depot

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
KME Parts Depot

Competitors
Furukawa

Manufactured in Japan

Use Accumulator

Expensive component parts
Rammer

Manufactured in Finland

Complex structure and many moving components

Use Accumulator

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

Expensive component parts

Similar to Montabert Design
KME Parts Depot

Competitors
KME Parts Depot

PC200
KME Parts Depot
C onstruction
I ndustry
M anufacturers
A ssociation

CIMA
PC200/220
KME Parts Depot

Product range
Introduced in
Middle East
KME Parts Depot

Jordan – PC350 / JTHB230
KME Parts Depot

KME Parts Depot
Ireland – Mc Hale
PC150 / JTHB100

KME Parts Depot
Ireland – Mc Hale
PC150 / JTHB100

Bosnia – Herzegovina
TEIKOM
KME Parts Depot PC450 / JTHB65

Finland – SRO
KME Parts Depot PC27MR / JTHB30

KME Parts Depot
Finland – SRO
PC228 / JTHB150

Ireland – Mc Candless

Funzi Keys – Kenya
KME Parts Depot
PC200 / JTHB150

Sweden – Swelog
KME Parts Depot
PC340 / JTHB310

Croatia – TEIKOM
KME Parts Depot
PC450 / JTHB310

Croatia – TEIKOM
KME Parts Depot
PC340 / JTHB310

Iceland – Kraftvelar
KME Parts Depot
PC340 / JTHB310

Germany – GP Baumaschinen

Germany – GP Baumaschinen
KME Parts Depot
PC450 / JTHB310

Remember …

High Impact Energy
=> Dual Power source

Thank you

Reliability & Durability for your interest
=> Simple & efficient design
=> No internal accumulator !

Back Pressure resistant
=> Fits on any excavator

Ecological
KME Parts Depot