Manitowoc 16000 - Swing Brake Pressure Sensor; Swing Holding Brake Switch

Reference Only
INTRODUCTION 16000 SERVICE/MAINTENANCE MANUAL
1-24
Published 05-09-17, Control # 014-28
Swing Lock past production.
When swing control handle is moved to right, an input
voltage of 2.6 volts or more is sent to Node-1 controller.
Node-3 controller sends a variable 0 to 24 volt output that is
divided by a resistor and applied to swing pump EDC. Pump
EDC tilts swashplate relative to control handle movement.
Fluid flows from pump ports to motor ports, moving rotating
bed to the right.
As swing control handle is moved to neutral position, Node-1
controller compensates for hydraulic system leakage or
changing engine speed. Node-3 controller sends a zero
output voltage to adjust pump swashplate to centered
position.
When in a swinging motion, the preferred way to stop or slow
crane is to move swing control handle beyond center in the
opposite direction. This allows rotating bed to gradually stop.
Swing Brake Pressure Sensor
See Figure 1-16 for the following procedure.
The swing lock is removed on current production cranes. An
additional pressure sensor will report to Node-5 and monitor
the swing brake pressure. The pressure sensor in the
diagnostic screen will only be available and appear on
cranes with the swing lock removed.
Swing Lock removed current production.
Swing Holding Brake Switch
Swing holding brake switch on side of swing control handle,
holds rotating bed in position (applies swing park brake) for
short periods when operating. To prevent damage to swing
system, swing holding brake switch must only be applied
when crane is at a standstill.
When holding brake switch is pressed in and held, an input
voltage is sent to Node-1 controller. Node-5 controller sends
a zero output voltage to shift swing brake solenoid HS-1.
Swing brake valve shifts to block fluid to brake and swing
brake is applied.
When swing holding brake switch is released, an input
voltage is sent to Node-1 controller. Node-5 controller sends
a 24 volt output to shift swing brake solenoid HS-1. Swing
brake valve shifts, allowing system pressure to hydraulically
release park brake.
FIGURE 1-15
HS-1
HS-2
HS-3
Pump
Brake
Swing Lock
Motor
Pressure
Sender
Pressure
Sender
16-1008
Accessory Pump
(Low-Pressure)
FIGURE 1-16
HS-1
Legend for Figure 1-16
Item Description
1 Swing Handle Command in Percent
2 Swing Pump Command in Percent
3 Swing Motors
4 Swing Brake Solenoid HS-1
5 Accessory Pump (Low Pressure)
6 Swing Brake
7 Swing Brake Pressure Sensor
8 Swing Right Pressure Sensor
9 Swing Left Pressure Sensor
1
2
3
7 8
6
5
4
9