AUX air conditioner service manual
Picture6-4 Expander
Picture6-5 Structure of expander
5. Tube-cutting knife
The tube-cutting knife is usually used for cutting the copper tubes in different lengths and diameters
when repairing or installing the air-conditioner. The types of the tube-cutting knife are various. The
common structure is as Picture 6-6 shows.
When cutting the copper tube, it shall be set at the place between the two rolling wheels of the
tube-cutting knife. Rotate the knife-supplying knob in the clockwise direction so as to clamp the
copper tube between the knife and the rolling wheel. Then rotate the knife-supplying knob and
simultaneously rotate the tube-cutting knife for cutting the copper tube. The force shall be balanced
and gently when rotating the knife-supplying knob, otherwise the copper tube may be distorted by
rough extrusion. After the copper tube being cut, use the cutter knife to remove the burr attached
to the edge of the tube mouth in case of the copper scraps enter into the refrigerating system.
a：Bracket b：Cutting wheel c：Adjusting knob
Picture 6-6 the structure of the tube-cutting knife
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