Download - 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