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2. If piston is still moving, pinch a piece of rebar, stopping just before it
breaks off (It is a 1/2 movement of piston).
3. Disconnect battery and place the tool so that the oil-plug is uppermost.
4. Remove oil-plug and seal washer (packing).
CAUTION:
Never remove oil-plug when the tool is hot or oil will spurt out.
5. Check that oil is level with bottom of plug hole (i.e. that pump case is full
to the brim). If oil level is too low, top up with fresh hydraulic oil with anti
foam and anti-abrasion properties (ISO viscosity grade VG32, e.g. Tellus
32 (Shell), DTE-24 (Mobil) or Uni-Power VG32 (Esso).
6. After topping up, extract air from the system. Gently tilt the tool lengthwise
and return it to a level position. Top up again and tilt in the opposite
direction. Repeat this process until all air has been extracted.
CARE:
Tool cannot function properly if oil contains air bubbles.
7. Replace seal washer (packing) and oil-plug. The operation is now complete.
OIL CHANGE
The hydraulic oil should be changed at least once a year, sooner if it appears
dirty.
NOTE:
Hydraulic oil should be warm before draining.
1. Disconnect battery. Remove oil-plug and seal washer (packing). Turn the
tool over and drain oil into a suitable receptacle. When oil ceases to
drain out, tilt the tool to rear so that oil trapped in piston housing can run out.
When housing is empty, tilt the tool in the opposite direction to empty the
residue in pump case.
2. With drain-hole uppermost, slowly fill the tool with fresh oil. Replace plug
and lightly tighten. Connect battery and advance piston two or three times.
Disconnect battery and remove oil-plug. Top up oil level and replace oil-
plug.
3. Finally, follow procedure for OIL-LEVEL CHECK (Steps 2-6)
NOTE:
Dispose of hydraulic oil in accordance with local regulations. Do not
pour into the sea, a river, a lake of drains.
BOLT TIGHTENESS
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. Always make sure that the bolts holding both cutter blocks are also
tight.
OVERHAUL
Return the tool to an authorized distributor for overhaul at least once every two
years, sooner if subject to heavy use.