Product Manual

Cutter_Instructions_2017A
Page | 4
May 7, 2019
jamming the piston. (See Maintenance) If, after cleaning, piston
still does not automatically retract when fully extended, the
piston itself may be damaged. Return the unit to an authorized
repair center or BN Products for repair.
MAINTENANCE ON CUTTER BLOCKS
Before using, always check that the two bolts on each cutter
block are properly tightened. Using a loose block will result in
damage to block and housing. Also check condition of cutter
blocks. If either cutting edge is dull or chipped, remove retain-
ing bolts and rotate both blocks so that two new edges come
into use. Replace and tighten bolts. (Each block has four cutting
edges.) When all four cutting edges have been used or if either
block is cracked or otherwise damaged, replace both blocks.
CAUTION: A loose or cracked block may result in injury to
operator.
CLEANING
Clean your tool every day, preferably immediately after use.
CAUTION: Wear gloves to protect hands from metal splin-
ters.
Do not use an air gun: blasting with air can cause metal filings
and/or dust to get into eyes and respiratory system.
Disconnect the unit. Wipe or brush away all dirt and metal
filings. Pay particular attention to the lower half of the piston,
where dirt is more easily accumulated.
NEVER USE YOUR CUTTER TO CUT REBAR IN WET
CONCRETE.
OIL-LEVEL CHECK
As the cutters are hydraulically operated, the oil-level must be
checked at frequent intervals, preferably every day. Failure to
maintain the oil at the proper level results in a drop in pressure
and loss of cutting power.
CAUTION: Hydraulic oil is highly flammable. Keep away
from sparks and naked flame. Do not smoke.
CAUTION: Hydraulic oil may cause inflammation of the
eyes and skin. If ingested, it will cause diarrhea and vomit-
ing. In case of eye contact, rinse in clean water for at least
15 minutes and consult a physician. In case of skin contact,
wash thoroughly with soap and water. In case of ingestion,
consult a physician immediately. Do not induce vomiting.
1. Oil should be warm but not hot. Warm up unit if cold.
2. Adjust stopper and make three or four cuts, noting exactly
at what point the rebar is actually breaking.
3. Pinch a short piece of rebar, stopping just before it breaks
off. Unplug unit from power source.
4. With partially severed rebar in place, oil-plug should be
straight up. (If unit is hot, allow cooling down.)
5. Remove oil-plug and seal-washer (packing).
CAUTION: Never remove oil-plug when unit is hot or
oil will spurt out.
6. Check that oil is level with bottom of plug hole (i.e. that
pump case if full to the brim). If oil level is too low, top up
with 20-weight hydraulic oil with anti-foam and anti-abra-
sion properties (ISO viscosity grade VG46, e.g. Shell oil
Tellus 68, Mobil oil DTE-25 or Esso Uni power SQ46).
7. After topping off, extract air from system. Gently tilt cutter
lengthwise and return it to a level position. Top off again
and tilt in the opposite direction. Repeat this process until
all air has been extracted.
CARE: Cutter cannot function properly if oil contains
air bubbles.
8. Replace seal washer (packing) and oil plug. Connect cutter
to power source and completely sever rebar.
OIL-CHANGE
e hydraulic oil should be changed at least once a year, sooner
if it appears dirty.
NOTE: Hydraulic oil should be warm before draining
1. Unplug unit from power source. Remove oil-plug and pack-
ing. Turn cutter over and drain oil into a suitable recepta-
cle. When oil ceases to drain out, tilt unit to rear so that oil
trapped in the piston housing can run out. When housing is
empty, tilt unit in the opposite direction to empty the resi-
due in the pump case.
2. With drain-hole uppermost, slowly fill the unit with fresh
oil. Replace plug and lightly tighten. Connect unit to power
source and advance piston two or three times. Unplug unit
and remove oil-plug. Top off oil-level and replace plug.
3. Finally, follow procedure for oil-level check. (Steps 2-8)
NOTE: Dispose of hydraulic oil in accordance with local regula-
tions. Do not pour into the sea, a river, a lake or drains.
BOLT TIGHTNESS
Once a week, or after every 500 cuts, check the tightness of all
bolts; especially those bolts securing the housing to the cylinder.
Loose bolts will result in a loss of power. Make sure that the bolts
holding both cutter blocks are also tight
CARBON BRUSHES
Inspect the two carbon brushes at least once every two months.
(Nominal brush life is 200 hours).