Manitowoc 16000 User Manual

Reference Only
Manitowoc Published 05-03-17, Control # 228-03 1-37
16000 SERVICE/MAINTENANCE MANUAL INTRODUCTION
1
LOAD DRUM 2
System Components
See Figure 1-23, Figure 1-24 and Figure 1-25.
Load drum 2 is located at the front top of the rotating bed.
One hydraulic pump drives one motor gearbox on right side
end of drum (standard) or drives two separate motor
gearboxes on each end of drum 2 (optional). The load drum
1 pump is dedicated to operate with load drum 2 though a
diverting valve. Hydraulic connections between the pump
and the motors form a closed-loop system that is controlled
with the control handle movement and node controllers. The
center load drum control handle on the right side console
operates drum 2. The control handle is inoperable when the
drum 2 park brake is applied.
Hydraulic charge pressure from the system charge pump
supplies hydraulic make-up fluid to the low-pressure side of
each drum 2 motor. A pressure sender in the high-pressure
side of the pump leg provides system pressure information to
the Node-1 controller. The low-side pressure supplies
hydraulic pilot pressure to operate the motor servos. A fixed
orifice between the pump ports A and B allows for smoother
drum operation.
When the load drum 2 motors rotate, a speed sensor at one
motor rotor monitors and sends an input voltage to the Node-
1 controller. The Node-2 controller sends an output voltage
to the rotation indicator in the control handle. As the drum
rotates faster, the rotation indicator on top of the control
handle pulsates with a varying frequency that indicates the
drum rotational speed. The handle command in percent from
neutral is shown on the Diagnostic Screen.
Continuous changing of the closed-loop fluid occurs with the
leakage in the pump, the motor, and the external sequence/
flow valve. The sequence/flow valve opens at 14 bar (203
psi) and removes 15 Lpm (4 gpm) of hot fluid from system by
discharging the exhausted fluid into the motor case where
the fluid returns to the tank.
Load Drum 2 Brake
Hydraulic pressure to operate drum 2 brake is from the low-
pressure side of the system.
When the drum 2 brake switch is in the ON-park position, the
drum brake release solenoid HS-20 is disabled so the brakes
are applied to each side of the drum shaft. The drum pump
does not stroke in response to the control handle movement.
When the drum 2 brake switch is placed in the OFF-park
position, the brake release solenoid HS-20 remains applied.
The brakes remain applied until the Node-5 controller sends
a 24 volt output to release the brake. The drum circuit is
active, waiting for a control handle command.
Raising Load
See Figure 1-23 and Figure 1-24.
When the drum 2 control handle is moved back for raising,
an input voltage of 2.4 volts or less is sent to the Node-1
controller. The Node-3 controller sends a variable 0 to 24 volt
output that is divided by a resistor and applied to the pump 6
EDC in the raising direction. The Node-4 controller sends a
24 volt output to enable drum 1 to drum 2 diverting solenoid
HS-16. The Node-3 controller sends a variable 0 to 24 volt
output that is divided by a resistor and applied to the pump 4
EDC in the raising direction. Both pumps supply the
hydraulic fluid to the drum 2 motors. The Node-3 and 5
controllers send a variable 0 to 24 volt output that is divided
by a resistor and applied to both motor PCP’s. The Node-1
controller checks that the drum block-up limit switches are
closed and no system faults are present.
The pump EDC tilts the swashplate in the raising direction to
satisfy the pressure memory. The Node-1 controller
compares the drum holding pressure to the value in the
pressure memory. When the system pressure is high
enough, the Node-5 controller sends a 24 volt output to
enable the drum 2 brake release solenoid HS-20. The drum
brake solenoid shifts to block the drain port and opens the
port to the low-pressure side of the drum system to release
the brake from the drum shaft.
Each pump EDC tilts the swashplate in the raising direction
as the hydraulic fluid flows from the pump ports to the motor
ports. Return fluid flows from the motor to the pump.
The Node-3 controller output voltages to each pump EDC
and the Node-3 and 5 controllers output voltage to each
motor PCP is relative to the control handle movement. As
control handle is moved back, an output voltage increases
the pumps swashplate angles.
NOTE: If drum 1 is selected to operate at the same time,
the Node-4 controller sends a 24 volt output to
disable the drum 1 to drum 2 diverting solenoid HS-
16. Drum 2 speed is reduced up to one half.
FIGURE 1-23
HS-20
HS-16
HS-21
Brake
Diverting
Valve
Motors
(PCP)
Pump
(EDC)
Pressure
Sender
Pump
(EDC)
16-1018
Accessory Pump
(Low-Pressure)
Accessory
Pump /(Low-
Pressure)

Manitowoc 16000 Specifications

General

Brand	Manitowoc
Model	16000
Category	Construction Equipment
Language	English