Leading Innovative Company "Maruzen”
Japanese  

HANDHELD BREAKER / BH18K

BH18K is the strongest breaker in 18kg class which is 2 times stronger than same weight electric breaker. Because of the strong force, it needs to prevent moil point from bouncing around operator’s feet, it has anti bouncing feature and it helps to aim the breaking point accurately.

BH18K is mainly used for road construction, maintenance or house demolition work. Hydraulic portability is most suitable for the site where it is difficult to bring huge power source such as generator or compressor, especially this is helpful products for disaster area.  

SPECIFICATIONS

Dimension (mm) 622×412×112
Weight (kg) 18 (Without tool)
Working Pressure (MPa) 8~11
Max Pressure (MPa) 21.4
Oil Flow (ℓ/min) 18~22
Blow Per Minute 1700
Shank Size Hex. 1″ x 4-1/4″ (25 x 108mm)
Coupling 3/8″ Couplers
Allowable Back Pressure (MPa) 2.5
Extension Hose (m) 3/8″×10(when used with unit)
Hydraulic Oil ISO VG32 (Standard), ISO VG46 or equivalent 
Vibration 3 axis:9.4㎨( JIS B 7762-5)

 

SPECIAL TOOLS

 

HOW TO USE

When connecting this breaker to a power source other than Maruzen UH070 power unit, make sure the power source you intend to use is within the range (oil flow, pressure etc.) prescribed above.

PREPARATION

1. Unlock the latch on the breaker and insert tool (moil point etc.)
 Turn around the tool (Hexagon tool) if it stuck on the half way of inserting.

2. Lock the latch.  Make sure the tool is firmly fastened.

3. Make sure there is no dust or dirt inside couplers before connecting breaker to the hydraulic power pack.

4. Active the power source.
 (Start the engine on the power pack)

 

OPERATION

5. The breaker and the breaking target should be at a right angle.
 Press down the breaker with your body weight.
 Grip the control lever and start hammering.

6. Do not hammer the same place for over 30 seconds.
 If the target object does not break within 30 seconds, change the hammering point.

7. Do not blank hammering for over 10 seconds.

 

AFTER OPERATION

8. Stop the power pack when the job has completed.

9. Push up the tool so the piston return to the position.

10. Detach the extension hoses.

11. Attach both couplers which are on the breaker together to prevent dust and dirt entering.

12. Unlock Latch, remove the tool from the main body.

13. Remove mud and dirt on breaker thoroughly.

MAINTENANCE

1.BEFORE LONG-TERM STORAGE

(1) Connect breaker to hydraulic power pack, insert any wood bar (∅20~25mm, L 350mm) into front end to push up piston to the end.

 

(2) Apply anti-rust oil to piston from the shank end.

 

< CAUTION >
Failure to observe above (1) (2) can cause rust inside the rock drill and lead to oil leak and anchoring.

 

(3) Apply oil all over breaker with wet cloth.
 Cover it properly and make sure it is kept in a low humidity place.

 

(4) Remove plug on front end and attach grease nipple for applying grease.

 

 

 

 

2.PERIODICAL INSPECTIONS

Ask your dealer for the periodical inspections.

 

Inspection Items Inspection Cycle
Nitrogen gas charge in accumulator 250 hours or 1 year
Replacement of accumulator diaphragm 500 hours or 2 years
Replacement of each O-Ring
Replacement of U-cup packing
Grease Movable Bushy (8g) Every 50 hours
Wear of Latch 1 year

* Accumulator Nitrogen gas pressure: 3.9MPa

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