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RAP 2.70 Stacker Tray Dump Cylin-
der
Stacker I/O PWB Output 5
The tray dump cylinder is used to lift the roller
tray and drop the book onto the output table.
The tray dump cylinder is located under the
roller tray, near the roller drive motor (Figure
2-108).
Possible Fault Indicators
The roller tray does not lift.
The tray dump cylinder does not actuate
when it should.
Initial Actions
Perform RAP 2.20 Pneumatic Pressure.
Check that all cables and air tubing between the
trimmer and Stacker are securely fastened and
are not damaged.
Perform GP 6.14 Speed-Control Air Valves.
Check that all air hoses in the Stacker are con-
nected properly, and are not damaged or
pinched.
Check for loose or damaged wire 75 at the
Stacker electrical panel.
Check that cable #2 is connected to the air valve
properly.
Procedure
1. Remove the rear panel on the Stacker and
locate the tray dump cylinder. Fully open
the flow control valves located at the air fit-
tings on the cylinder.
2. Switch the main air ON and main power ON.
3. Manually activate the tray dump valve by
pressing the actuator button on the valve
2. Status Indicator RAPs
(Figure 2-108). Does roller tray lift to the
book drop position?
Y
N
Disconnect main power and replace the
valve (PL 5.66 Stacker Air Manifold 58008).
4. Electrically activate the valve by shorting
wire 75 to wire 74. Does the valve actuate
and the roller tray lift to the book drop posi-
tion?
Y
N
Disconnect main power and replace the
valve (PL 5.66 Stacker Air Manifold 58008).
5. Check for loose or damaged cables between
the trimmer and Stacker. Check for proper
hose and wire connections inside the
Stacker. Did this fix the problem?
Y
N
Disconnect power and replace the Stacker
I/O PWB (REP 4.26 Accessory PWB Re-
placement).
6. Readjust the flow control valves so that the
tray dump cylinder moves at a moderate
speed (GP 6.14 Speed-Control Air Valves).
MAY 2019
2-78
Figure 2-108. Tray Dump Cylinder, Valve
CMT-130TC Book Trimmer
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