BR67 User Manual ◄ 11
NOTE: Partially depressing the trigger allows the
tool to run at slow speed. Slow-speed operation
permits easier starting of the tool bit into the work
surface.
5. To start, break an opening (hole) in the center of
the surface. After making a hole, break portions
of the material into the original opening. For best
productivity, the breaking should be done around
the original hole.
The size of the broken material will vary with the
strength and thickness of the base material and the
amount of any reinforcement wire or rebar.
Harder material or more reinforcing wire or rebar will
require taking smaller bites. To determine the most
effective bite, start with 2 in. / 50 mm or smaller bites.
Bites can then be gradually increased until the
broken piece becomes too large, requiring increased
time to break off the piece.
Sticking of the tool bit occurs when too large a bite
is being taken and the tool bit hammers into the
material without the material fracturing. This causes
the tool bit to become trapped in the surrounding
material.
COLD WEATHER OPERATION
If the breaker is to be used during cold weather, preheat
the hydraulic uid at low engine speed. When using the
normally recommended uid, uid temperature should
be at or above 50 °F/10 °C (400 ssu/82 centistokes)
before use.
Damage to the hydraulic system or breaker can result
from use with uid that is too viscous or thick.
The recommended hose size is .500 inch/12 mm I.D. up
to 50 ft/15 m long and .625 inch/16 mm I.D. minimum up
to 100 ft/30 m.
PRE-OPERATION PROCEDURES
CHECK POWER SOURCE
1. Using a calibrated ow meter and pressure gauge,
check that the hydraulic power source develops a
ow of 7-9 GPM/26-34 LPM at 1500-2000 psi/105-
140 bar.
2. Make certain the hydraulic power source is equipped
with a relief valve set to open at 2100-2250 psi/145-
155 bar maximum.
INSTALL TOOL BIT
1. Rotate the latch on the breaker foot downward
(pointing away from the tool).
2. Insert the tool bit into the foot and pull the latch up to
lock the tool bit in place.
CONNECT HOSES
1. Wipe all hose couplers with a clean, lint-free cloth
before making connections.
2. Connect the hoses from the hydraulic power source
to the tool ttings or quick disconnects. It is a good
practice to connect return hoses rst and disconnect
them last to minimize or avoid trapped pressure
within the tool.
3. Observe ow indicators stamped on hose couplers
to ensure that uid ow is in the proper direction. The
female coupler on the tool hose is the inlet coupler.
4. Move the hydraulic circuit control valve to the ON
position to operate the tool.
NOTE: If uncoupled hoses are left in the sun,
pressure increase within the hoses may make them
difcult to connect. When possible, connect the free
ends of the hoses together.
OPERATION PROCEDURES
1. Observe all safety precautions.
2. Install the appropriate tool bit for the job.
3. Place the bit rmly on the surface to be broken.
4. Squeeze the trigger to start the breaker. Adequate
down pressure is very important. When the tool bit
breaks through the obstruction or becomes bound,
release the trigger and reposition the tool bit.
OPERATION
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