Purge Unit Tubes; Screw Fastening Of Idle Pulley Ass'y - Canon BJC-8500 Service Manual

Part 5: Maintenance

4.2.3 Purge unit tubes

When ink and ink optimizer react, they harden, so, separate absorbers are used for
absorbing waste ink and ink optimizer. Be sure to check that the three tubes on the
purge unit (blue and yellow for ink, transparent for ink optimizer) are at the locations
specified in Figure 5-7 Purge Unit Tubes . When the tube tips are blocked, ink may
harden on the tube tips, and cause defective suction. Pay special attention to this
when assembling the purge unit.

4.2.4 Screw fastening of idle pulley ass'y

Use the spring scale (special tool: CK-0055-000) to fasten the idle pulley ass'y screw
when it has been loosened, for example, to remove the carriage. Tighten the screw by
applying a tension of 1760±100gf read on the spring scale. Before you fasten the
screw, move the carriage a few times to the left and right to provide constant belt
tension.
Spring Scale
Blue Tube
Transparent Tube
Yellow Tube
Figure 5-7 Purge Unit Tubes
Fastening Screw
Carriage Belt
Figure 5-8 Screw Fastening of ldle Pulley Ass'y
5-8
Idle Pulley Ass'y
BJC-8500