Manitowoc National Crane NBT40 Series, Service Manual

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ELECTRIC SYSTEM NBT40 SERVICE MANUAL
3-8
Published 8-01-2017 Control # 287-11
Figure 3-7 Item List
Crane Manifold Solenoids
The RCL and ATB solenoids are located on either the 6 or 4
section Dump Valve (B or C, Figure 3-7); they disable the
crane operations that worsen an impending tipping or two
block conditions. The operations listed below are disabled
when the solenoids are energized.
1. Main Hoist Down
2. Main Hoist Up
3. Boom Telescope Cylinder - Extend the Boom
4. Auxiliary Hoist Up (optional)
5. Aux Hoist down (optional)
6. Lift Cylinder Retract - Boom Down
The crane manifold solenoids are located on the crane
manifold valve (A, Figure 3-7) and provide for the following
operations.
7. Crane Function Power - enables all crane functions
when energized.
8. Air Conditioner - runs the air conditioner compressor
when energized, if not used this port is plugged.
9. Swing Brake - applies the swing park brake when
energized.
FIGURE 3-7
6
5
4
3
2
1
7
8
C
A
9
7587-3
7587-2
1
2
3
6
B
7587-4
Item Solenoid Valve
1 Main Hoist Down
2 Main Hoist Up
3 Boom Telescope Extend
4 Auxiliary Hoist Up (optional)
5 Auxiliary Hoist Down (optional)
6 Lift Cylinder Retract
7 Crane Function Power
8 Air Conditioner or Plugged
9 Swing Brake
A Crane Manifold Valve
B Dump Valve (4 section)
C Dump Valve (6 section, optional)
Reference Only