Furukawa Frd

8/18/2019 Furukawa Frd

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FRD-FURUKAWA F-Series

Hydraulic Breakers


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Development Target

1. Durability reliability.

2. Increase blow power.

3. Reduce maintenance cost.

4. Multi-function valve to meet market demand.

5. Newly designed box frame.

6. Introduce series of product to fit series of

excavator sizes.


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Sales features

1. Clean air-intake system extends piston and

bushing life.

2. Lubrication for upper and lower bushings.

3. Relief valve to maintain system pressure.

4. Anti-idle blow valve.

5. Front and side mounted hose fitting ports.

6. Tunnel conversion ease.


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Series Construction

1. Mini – Series･････････････ F1.2.3.4.5

2. Mid - Size Series･････････ F6. 9

3. Conventional Series

･･････

F11.20.30.70

4. Multi - Function Series

･･･

F12.19.22.27.35.45


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Mini Series (F1-F5)

Accumulator

Front-head

Rod

Through bolt

Nitrogen Gas

Back-head

Cylinder

Piston

Rod pin

Oil port

Control valve

Front bushing


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Mid-Size Series(F6 & F9)

Nitrogen gas

Back-head

Cylinder

Piston

Through-bolt

Thrust ring

Thrust bushing

Rod-pin

Accumulator

Front-head

Rod

Control valve

Front bushing

Charge valve

Nitrogen gas

Oil port


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Conventional Series (F11 F20 F30 F70)

Accumulator

Front-head

Rod

Oil ports

Nitrogen gas

Charge valve

Grease fitting

Nitrogen gas

Back-head

Cylinder

Piston

Through bolt

Front-cover

Rod pin

Thrust ring

Thrust bushing

Control valve


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Multi-Function Series (F12 - F45)

Nitrogen gas

Back-head

Cylinder

Piston

Front head

Through bolt

Front cover

Rod pin

Accumulator

Rod

Control valve

Charge valve

Nitrogen gas

Oil ports

Air intake

Thrust ring

Thrust bushing


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Functions

1. Through bolt

2. Cylinder

3. Accumulator

4. Piston

5. Front-head

6. Front cover/bushing

7. Rod

8. Control valve

9. Stroke adjuster

10. Valve adjuster

11. Safety valve

12. Back-head


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Retains back-head, cylinder and front-head together.

All the threads are die-rolled to maintain material flow.

When one through bolt is failed, replace diagonally opposed through-

bolt also.

To re-torque through-bolts, loosen four of them to ½ turn, and re-torque

them to the specification.

Back-head

F6

– F70

F1 – F5

Cylinder

Front-head

Through-bolt

Through-bolt

ack-head

Cylinder

Front-head

Through-bolt


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The largest single part of the breaker. It is machined, then

heat-treated and polished to the specification.

F1

– F5

F6 F9 F11 - F70

Cylinder


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Reserves pressure oil and absolves pressure spike when piston is at top dead

center and bottom dead center. It is Nitrogen filled.

F11and up,diaphragms can be replace with hand tools.

When diaphragm is damaged, inlet hose will vibrates and brake power will

be decreased

.

Accumulator

F1

– F5

Accumulator

Back-head

Cylinder

Diaphragm

Screw-on

Needs die

Bolt-on


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Transmits dynamic power toward the rod and rod will break object rock.

Surface of the piston is super finished. Not chrome plated.

Surface of the piston is only protected by the oil film from rusting.

Pistonod

F1

– F5

F6 – F70

Pistonod

F6

– F701

– F5

Piston


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Front-Head-1

Front-head is installed with thrust bushing and front-bushing.

They hold rod in-line to the piston.

Front-Head

Grease fitting

Front bushing

Grease fitting

F1 – F5F6, F9

Thrust bushing


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Front-Head-2

Front-head is installed 3 wear bushings named thrust ring, thrust bushing and

front-cover. They hold the rod in-line to the piston.

Thrust bushing

Thrust ring

Air check valve

F11, F20, F30F12, F19, F22, F27, 35, F45, F70

next page


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Front-Cover/Bushing

Front-Cover/Bushing holds rod and it is exposed to the dusty condition.

Grease lubrication is a key for maintenance.

Front-Bushing

Front-Cover

For F11 and larger breakers, front-cover is provided with

wear indicating recess

.

Advise operator to replace front cover before recess is wear out.

Use of worn front cover can damage rod head or piston striking face

.

F1 - F5

：

4mm

F6 F9

：

6mm

F11 - F27 : 3.5 mm

F30 - F70 : 4.5 mm

Clearance

Thrust ringThrust bushing

Front-head

.

Front cover


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Rod

Four different kind of rods are available for different rock conditions.


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Flat(blunt)rod

Flat tip design rod, common for shot rock breaking. Used for hard but

cracked rock. Rod breaks rock with shock wave.

Because of flat face, rod will not slip during breaking.

Moil point / corn rod

Conical tip is named corn rod and square dipyramid is named moil point

rod. Commonly used for breaking of concrete, rock layers, hard foundation

and road construction. Sharp point can penetrate well against the rock

with wedge effect.

Rod


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Wedge point

Chisel design tip is named wedge point.. Wedge effect of the tip will

penetrate into the object rock. Good for trenching, breaking of layered

rock. It is not recommended to use for hard rock.

Core rod

Fitted hard alloy steel bar in the moil point rod. This rod is only

recommended for abrasive rock.

Rod


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Control Valve

F1 – F5 : Control valve is directly mounted on the piston.

F6 & F9 : Control valve is built in the cylinder.

Control valve

F1 - F5 F6 , F9

Piston

Cylinder


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Multi-Function Control Valve

Stroke adjuster

Valve adjuster

Remote grease port

Safety valve

F12, F19, F22, F27, F35, F45


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Stroke Adjuster

Stroke Adjuster

Stroke Valve

Constant Blow

Stroke valve

Automatic Stop

Available for F11 and larger

Adjusts piston stroke. LONG stroke or SHORT stroke.LONG stroke: less number of blows. 100 blows.

SHORT stroke: more number of blows. 150 blows but 70 force of LONG stroke

For hard rock use LONG stroke.

For soft or cracked rock, use SHORT stroke.

Choice of AUTOMATIC STOP valve. Named

“ nti

idle

low”

Quit blows when rock is broke.

To restart simply press the rod

against the rock.

*Only active at LONG stroke position.


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Stroke Adjuster

Screw Position

Number of rotations from the fully screwed in position.

N u m b e r o f b l o

w s

V l Adj & S f l


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Open : To increase number of blows and decrease operating pressure.

Close : To reduce number of blows and raise operating pressure.

Valve Adjuster & Safety valve

Open Close

Adjuster

Valve Adjuster

(Factory preset, no adjustment required)

V l Adj & S f l


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Safety Valve

Valve Adjuster & Safety valve

Control maximum operating pressure at 21MPa.

Valve is not re-adjustable. Replace spring, needle and sheet if operating pressure becomes low.

needle

spring

sheet


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F1 – F5: Nitrogen gas is not charged.

F6 – F9: Nitrogen gas is charged.

Compressed nitrogen gas increases piston down speed.

Back-head

Accumulator

F1 - F5

F6, F9 Back-head

Charge valve

Back-Head


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Back-Head

F12, F19, F22, F27, F35, F45, F70

Increase gas press. : Increase impact power and decrease number of blows.

Decrease gas press. : Decrease impact power and increase number of blows.

Nitrogen gas can leak. When impact power is decreased, measure nitrogen gas pressure.

Back-Head

Charge valve

Swivel adopter

Back-head2 x 2 Oil port

Charge valve

F11

F20

F30

Hi pressure IN

Back-head

Air cap

Hi pressure IN


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Rock rofessional

Documents

Furukawa Frd