Leading Innovative Company "Maruzen”



・Most powerful in this class!
 Max allowable intake pressure:27.5MPa

・Suitable for a variety of work.
 1.For breaking concrete and rock
 2.For driving in anchor and pile
 3.For digging out hard ground
 4.For tamping soil and sand
 5.For cutting and breaking asphalt

・Easy to attach with various excavator.
 2 pcs of PIN, 4 pcs of BUSH,
 and hoses are required to attach with an excavator.


Dimensions (mm) 778×476×218
Weight (kg) 95
Working Pressure (MPa) 9.8~14.7
Allowable Pressure (ℓ/min) 27.5
Required Oil Flow / B.P.M. 20~25ℓ/min → 500~600bpm
25~30ℓ/min → 600~800bpm
30~35ℓ/min → 800~950bpm
Connection 3/8” Couplers (Hose Connection 1/2”)
Suitable Machine(Bucket Capacity)(㎥) 0.04~0.08
Suitable Machine (Weight)(t) 1.5~2.5
Moil Point Length 550m, Dia 50mm, Weight 7.2kg



1. An accumulator is equipped on the top to get breaker hit stable.

2. Control Valve inside Valve Body switches flow of oil according to the movement position of piston and controls striking part.

3. Piston goes up and down in cylinder and strikes a moil point.

4. Valve Body trough Front End are tighten by 4 pcs of bolts.

5. Oil flow in from upper high pressure side, and come out from lower low pressure side.

6. Moil point can be attached on and off easily by only one retainer pin.




1. Piping is different according to the models and types of excavator.
Refer the following basic piping for your attachment of machine and piping.

2. Keep the relief-set pressure in the range of 14.7~27.5MPa.


1. Prepare 4 pcs of bush and 2 pcs of pin to attach the breaker to excavator.
Grease in and outside of bush when attaching it to the bracket.
Keep the breaker horizontal and attach arm of excavator and bucket link together with 2 pcs of pin.
Insert 2 pcs of pin and fix the bracket with M10x20 hex bolts and spring washers.
Connect hydraulic hoses to the PTO port on excavator.
Be sure to turn off engine this time.
Connect the hoses correctly.
Upper side hose of the breaker is IN, and lower side hose is OUT.

2. Grease moil point and insert to the breaker.

3. After operation, turn off the engine when you take out moil point.
Be sure to wear glove since moil point would get very hot after operation.

4. To remove the breaker, place the breaker horizontally on the ground,
depressurize the breaker circuit, and then stop the engine.
While the breaker is being used, temperature of each section rises as oil temperature rises.
Use gloves to avoid unnecessary damage due to high temperature.



Before operation, always check the followings and be sure there are no damages or troubles.
Please make sure to stop the engine before checking.

Inspection Items Countermeasures
Looseness of bolts of pin bracket When loosened, degrease the bolts and re-tighten with tightening torque of 196N/m applied lock tight No.1342
Looseness of hoses When loosened, re-tighten
Looseness of bolts for mounting breaker When loosened, apply lock tight andre-tighten
Looseness of nut of draw bolt When loosened, apply lock tight andre-tighten
Damage or oil leak from hose Replace when oil leak


 (1) Check the volume and dirt of hydraulic oil in the tank.
 The dirt of hydraulic oil may cause the damage to the breaker.
 Replace the oil when it is dirty.

 (2) Grease the chisel
 Grease the chisel enough, or the chisel burns stuck or wears earlier.
 Grease to the nipple on the front end id the chisel grease is dry during operation.
 (Grease with a gun with chisel inserted.)
 Grease 4-5 times with a grease gun at the beginning of daily operation.

 (3) Check if the contacting parts of the retainer pin and the chisel is swollen.
 If so, plane it with a grinder.



Inspection Items Inspection Cycle
Recharge of nitrogen gas Every 100 hours or
6 monthGas pressure 5.4MPa
Replacement of seals Every 300 hours or 1 year
Replacement of accumulator diaphragm Every 300 hours or 1 year
Retainer pin Depending on wear damage
Hydraulic Hose When damaged or Oil leaks
Replacement of bolt, nuts, etc. When damaged