Furukawa Frd

FRD-FURUKAWA F-Series Hydraulic Breakers

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.

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.

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

Mini Series (F1-F5) Accumulator

Nitrogen Gas Back-head

Oil port Control valve

Cylinder

Through bolt Piston Front-head

Rod pin

Front bushing Rod

Mid-Size Series(F6 & F9) Charge valve

Through-bolt

Control valve

Nitrogen gas

Oil port Accumulator Nitrogen gas Front-head

Back-head

Cylinder

Piston Thrust ring Thrust bushing

Front bushing

Rod

Rod-pin

Conventional Series (F11、F20、F30、F70) Oil ports

Through bolt Nitrogen gas

Charge valve Control valve Accumulator Nitrogen gas Front-head Grease fitting

Rod

Back-head Cylinder Piston Thrust ring Thrust bushing Rod pin Front-cover

Multi-Function Series (F12 - F45) Air intake Oil ports Charge valve

Control valve Accumulator Nitrogen gas Thrust ring Thrust bushing

Through bolt Nitrogen gas Back-head Cylinder Piston

Front head Rod pin

Front cover Rod

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

Through-bolt Retains back-head, cylinder and front-head together. All the threads are die-rolled to maintain material flow. Through-bolt Back-head

Through-bolt

Back-head

Cylinder

Cylinder

Front-head

Front-head

F1 – F5

F6 – F70 When one through bolt is failed, replace diagonally opposed throughbolt also. To re-torque through-bolts, loosen four of them to ½ turn, and re-torque them to the specification.

Cylinder The largest single part of the breaker. It is machined, then heat-treated and polished to the specification. F1 – F5

F6 & F9

F11 - F70

Accumulator 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.

Diaphragm

Accumulator

Cylinder Back-head F1 – F5

Screw-on Needs die

Bolt-on

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

Piston Transmits dynamic power toward the rod and rod will break object rock. Surface of the piston is super finished. Not chrome plated. F1 – F5

Rod

Piston

F6 – F70

F1 – F5

F6 – F70 Rod

Piston

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

Front-Head-1 Front-head is installed with thrust bushing and front-bushing. They hold rod in-line to the piston. F1 – F5

Front-Head

F6, F9

Grease fitting

Grease fitting

Thrust bushing Front bushing

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. next page

F12, F19, F22, F27, 35, F45, F70 Air check valve

Thrust ring Thrust bushing

F11, F20, F30

Front-Cover/Bushing Front-Cover/Bushing holds rod and it is exposed to the dusty condition. Grease lubrication is a key for maintenance. F1 - F5 ： 4mm F6 ・ F9 ： 6mm Clearance

Front-Bushing 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 . F11 - F27 : 3.5 mm F30 - F70 : 4.5 mm Thrust bushing

Front-Cover

Thrust ring

.

Front cover

Front-head

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

Rod 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 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.

Control Valve F1 – F5 : Control valve is directly mounted on the piston. F6 & F9 : Control valve is built in the cylinder. F1 - F5

F6 , F9 Control valve

Cylinder

Piston

Multi-Function Control Valve F12, F19, F22, F27, F35, F45

Remote grease port Valve adjuster

Stroke adjuster

Safety valve

Stroke Adjuster 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 “Anti idle blow” Quit blows when rock is broke. To restart simply press the rod against the rock. *Only active at LONG stroke position.

Stroke Valve Constant Blow

Stroke valve Automatic Stop

Stroke Adjuster

Number of blows

Stroke Adjuster

Screw Position Number of rotations from the fully screwed in position.

Valve Adjuster & Safety valve Valve Adjuster (Factory preset, no adjustment required) Open : To increase number of blows and decrease operating pressure. Close : To reduce number of blows and raise operating pressure.

Open

Adjuster

Close

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

spring needle sheet

Back-Head F1 – F5: Nitrogen gas is not charged. F6 – F9: Nitrogen gas is charged. Compressed nitrogen gas increases piston down speed.

F1 - F5

F6, F9 Accumulator

Back-head Charge valve

Back-head

Back-Head 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. 2 x 2 Oil port

Back-head

Back-head

F11、F20、F30

Air cap

Hi pressure IN

Hi pressure IN

Charge valve Charge valve Swivel adopter

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

Rock Professional