Leading Innovative Company "Maruzen”
Japanese  

HANDHELD BREAKER / BH20EV

BH20EV is designed to be a 20kg class breaker which can be used in EU. To confirm the CE regulation, it has anti-vibration handle and it reduce the burden by the vibration to the operator. And also, BH20EV has anti-bouncing feature, it reduce bouncing around operator’s feet and it helps to aim the breaking point accurately.

Because of the feature of hydraulic tools which is compact and can be used cold place, BH20EV is mainly used in Eastern Europe.

 

 

SPECIFICATIONS

Dimensions(mm) 665×410×110
Weight (kg) 20(Without tool)
Working Pressure (MPa) 8~11
Max Pressure (MPa) 20.6
Oil Flow (ℓ/min) 20.5
Blow Per Minute 1450
Shank Size Hex. 1″ x 4-1/4″ (25 x 108mm)
Coupling 3/8in Couplers
Allowable Back Pressure (MPa) 2.5
Extension Hose (m) 3/8in×10(when used with unit)
Hydraulic Oil ISO VG32 (Standard) or
ISO VG40 equivalent Abrasion Resistant Hyd. Oil
Sound Level At 7m point:84.3dB(A)
Vibration Level 3 axis:8.56㎨ ( 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 with hydraulic power source, and use moil point to push up the 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 on the piston and lead to oil leak and anchoring.

 

(3) Change Plug (48) to Grease Nipple (68) and grease 5-8 time with grease pump.

 

(4) Wipe the main body with cloth wetting with oil and clean it.
 Put on cover and store at the place where there are no humidity.

 

2. PERIODICAL INSPECTION

Ask your dealer for the periodical inspections.

Inspection Item Operating Hours
Nitrogen gas charge in accumulator 300 hours or 1 year
Replacement of accumulator diaphragm 500 hours or 2 years
Replacement of each O-ring Every 3 years
Replacement of Valve Rod O-ring 500 hours or 2 years
Replacement of U-cup packing 500 hours or 2 years
Grease Movable Bushy (8g) Every 50 hours
Wear of Movable Bush Every 250 hours or every year

* Accumulator Nitrogen gas pressure: 3.5MPa (35.7kgf/㎠)

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