construction f series

7/30/2019 Construction F Series

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FRD-FURUKAWAF-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 andbushing 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 F1.2.3.4.52. Mid - Size Series F6. 93. Conventional Series F11.20.30.704. Multi - Function Series F12.19.22.27.35.45


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Mini Series (F1-F5)

Accumulator

Front-head

Rod

Through bolt

Nitrogen GasBack-headCylinder

PistonRod pin

Oil portControl valve

Front bushing


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Mid-Size Series(F6 & F9)

Nitrogen gasBack-headCylinder

Piston

Through-bolt

Thrust ringThrust bushingRod-pin

Accumulator

Front-head

Rod

Control valve

Front bushing

Charge valve

Nitrogen gas

Oil port


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Conventional Series (F11F20F30F70)

Accumulator

Front-head

Rod

Oil ports

Nitrogen gas

Charge valve

Grease fitting

Nitrogen gasBack-headCylinderPiston

Through bolt

Front-coverRod pin

Thrust ringThrust bushing

Control valve


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Multi-Function Series (F12 - F45)

Nitrogen gasBack-headCylinderPistonFront head

Through bolt

Front coverRod pin

Accumulator

Rod

Control valveCharge valve

Nitrogen gas

Oil portsAir intake



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Functions

1. Through bolt2. Cylinder3. Accumulator4. Piston5. Front-head6. Front cover/bushing7. Rod8. Control valve9. Stroke adjuster10. Valve adjuster11. Safety valve12. 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 turn, and re-torquethem to the specification.

Back-head

F6 F70F1 F5

Cylinder

Front-head

Through-bolt Through-boltack-head

Cylinder

Front-head

Through-bolt


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The largest single part of the breaker. It is machined, thenheat-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 deadcenter 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 willbe decreased.

Accumulator

F1

F5

Accumulator

Back-headCylinder

Diaphragm

Screw-onNeeds dieBolt-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

PistonodF6

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-HeadGrease fitting

Front bushing

Grease fitting

F1 F5 F6, F9

Thrust bushing


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Front-Head-2

Front-head is installed 3 wear bushings named thrust ring, thrust bushing andfront-cover. They hold the rod in-line to the piston.

Thrust bushingThrust ring

Air check valveF11, F20, F30F12, F19, F22, F27, 35, F45, F70

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Front-Cover/Bushing

Front-Cover/Bushing holds rod and it is exposed to the dusty condition.Grease lubrication is a keyfor 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 4mmF6 F9 6mm

F11 - F27 : 3.5 mmF30 - F70 : 4.5 mm

Clearance


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)rodFlat tip design rod, common for shot rock breaking. Used for hard butcracked rock. Rod breaks rock with shock wave.Because of flat face, rod will not slip during breaking.

Moil point / corn rodConical tip is named corn rod and square dipyramid is named moil pointrod. Commonly used for breaking of concrete, rock layers, hard foundationand road construction. Sharp point can penetrate well against the rockwith wedge effect.

Rod


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Wedge pointChisel design tip is named wedge point.. Wedge effect of the tip willpenetrate into the object rock. Good for trenching, breaking of layeredrock. It is not recommended to use for hard rock.

Core rodFitted hard alloy steel bar in the moil point rod. This rod is onlyrecommended 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 valveF1 - F5 F6 , F9

Piston

Cylinder


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Multi-Function Control Valve

Stroke adjusterValve 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 strokeFor hard rock use LONG stroke.For soft or cracked rock, use SHORT stroke.

Choice of AUTOMATIC STOP valve.Named Anti idle blowQuit blows when rock is broke.To restart simply press the rodagainst 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.

Numberofblo

ws

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 ValveValve Adjuster & Safety valve

Control maximum operating pressure at 21MPa.Valve is not re-adjustable. Replace spring, needle and sheet if operating pressure becomes low.

needlespring

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

AccumulatorF1 - F5 F6, F9 Back-head

Charge valve

Back-Head


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Back-Head F12, F19, F22, F27, F35, F45, F70Increase 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

F11F20F30

Hi pressure IN

Back-head

Air cap

Hi pressure IN


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Rock Professional

construction f series

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