Brother MFC5890CN Service Manual page 208

• When mounting a new head/carriage unit, apply the specified lubricant to the specified
points, referring to Section
Also, after mounting a new head/carriage unit, apply the specified lubricant to the
specified points on the sliding surfaces of the CR guide rail and CR support chassis,
referring to Section
• Before mounting the head/carriage unit on the engine unit, be sure to move the front and
rear slider cams to the rightmost position to prevent them from scratching or damaging
the PF encoder disk.
Rear slider cam
Head/carriage unit
• When mounting the head/carriage unit on the left end of the engine unit, first fit the front
end over the CR support chassis (shown on the previous page) and then set the rear end
onto the CR guide rail. Make sure that the two front bosses (see below) provided on the
bottom of the head/carriage unit catch the front edge of the CR support chassis and the
two rear bosses are fitted in the two cutouts (shown on the previous page) in the CR guide
rail.
• After mounting the head/carriage unit, slide it by hand to check that it smoothly moves to
the right and left ends of its travel.
• After replacement of the head/carriage unit, check that the CR encoder strip and PF
encoder disk are free of grease and ink. If they are stained with grease or ink, replace
them.
6.2.
6.2.
Front slider cam
Viewed from the bottom
Rear bosses
Front bosses
6-53
(6_60)
(6_61)
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