Manitowoc 16000 User Manual

Reference Only
INTRODUCTION 16000 SERVICE/MAINTENANCE MANUAL
1-62
Published 05-03-17, Control # 228-03
Hydraulic pressure from the accessory pump flows through
the pressure control pilot valve, the six bank manifold valve,
and enters the free-flow check valve section of the
counterbalance valve. Fluid pressure on the rod end of
selected jack cylinder retracts the jack cylinder to lower the
counterweight base.
Hydraulic fluid from the piston end of the jack cylinder is
blocked by the free-flow check valve section of the
counterbalance valve and the flow restraining section of the
relief valve preset for a relief setting of approximately 138 bar
(2,002 psi). The piston end cylinder pressure opens the
restraining section of the counterbalance valve, allowing fluid
to exit the valve. Return hydraulic fluid passes through the
six bank manifold valve before returning to the crane
hydraulic tank through the return line.
When the desired jack cylinder retraction is reached, release
the selected jack switch to lock the jack cylinder(s) in
position. Hydraulic fluid at the piston end of the jack cylinder
counterbalance valve supports the weight and the gravity
force of the wheeled counterweight assembly.
When the selected jack switch is released, an input signal is
sent to the Node-1 controller. The Node-7 controller sends a
zero volt output to the hydraulic solenoid HS-75 to the return
valve to the center position.
Node-3 sends a variable voltage output to the accessory
system proportional relief solenoid HS-68 to provide
approximately 28 bar (406 psi) system pressure.
Left Rear Jack
FIGURE 1-50
Proportional
Relief Valve
Suction
Manifold
Variable Accessory
Pump 400 to 5,000
psi
(28 to 345 bar)
Pressure Control
Pilot
To Other MAX-ER
Systems
Six Bank Valve Manifold
HS-75
HS-74
Left Front Jack Extend
HS-77
HS-76
HS-79
HS-78
Left Rear Jack
Proportional
Relief Valve
Suction
Manifold
Variable Accessory
Pump 400 to 5,000
psi
(28 to 345 bar)
To Other MAX-ER
Systems
Six Bank Valve Manifold
HS-75
HS-74
Left Front Jack Retract
HS-77
HS-76
HS-79
HS-78
4,500 psi
(310 bar)
Pressure Control
Pilot
4,500 psi
(310 bar)
HS-68
HS-68
M16-04
M16-05

Manitowoc 16000 Specifications

General

Brand	Manitowoc
Model	16000
Category	Construction Equipment
Language	English