Challenge CMT-130, Service Manual, Page: 50 / 226

FEB 2017
2. Status Indicator RAPs 2-40 CMT 130 Book Trimmer
RAP 2.32 Book Lift Air Blast
Output 16
The book lift air blast jet is mounted on the grip-
per assembly, Figure 2-49. The blast creates an
air layer under the book protecting the bottom
cover from marks and scratches while it is mov-
ing. To adjust the amount of lift, see ADJ 4.15
Book Underside Air Lift.
Possible Fault Indicators

Book lift blast fails

Marking or scratches on covers due to
rubbing on the table
Initial Actions
Perform GP 6.15 Speed-Control Air Valves.
Check for a plugged air jet, air leaks, and dis-
connected or pinched hoses.
Check for loose or broken wire 33 at the power
panel.
Check that the wire connector for valve number
7B is connected properly.
Procedure
1. Manually activate valve number 7B by
pressing the actuator button on the valve
(Figure 2-50). Does the valve activate?
Y N
Disconnect main power and replace valve
number 7 (PL 5.21 Pneu. Manifold Asm.
59012-1).
2. Electrically activate valve number 7B by
shorting wire 33 to 74 on the main PWB.
Does the valve activate?
Y N
Disconnect main power and replace valve
number 7 (PL 5.21 Pneu. Manifold Asm.
59012-1).
3. Disconnect main power and replace the
main PWB (REP 4.22 Main PWB Replace-
ment).
Figure 2-49. Book Lift Blast
Figure 2-50. Pneumatic Valve #7