Manitowoc Grove CD3340B - General Description; General; Technical Data; Hydraulic Pressures

HYDRAULIC SYSTEM CD3340B/YB4411
4-2
Published 04/07/2015 Control # 569-00
TECHNICAL DATA
Hydraulic Pressures:
Main System Pressure (Pump Compensator) . . . . . . . . . . . . . . . . . . . . . . 3625 ± 50 psi (24 994± 345 kPa)
Pump Margin Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 275 ± 5 psi (1896 ± 35 kPa)
Swing Circuit Relief Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2000 ± 50 psi (13 790 ± 345 kPa)
Steering Relief Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2500 ± 50 psi (17 237 ± 345 kPa)
Outrigger Relief Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2500 ± 50 psi (17 237 ± 345 kPa)
Telescope Circuit Port Relief . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2000 ± 50 psi (13 790 ± 345 kPa)
Pilot Control System (Pressure Reducing Valve). . . . . . . . . . . . . . . . . . . . 500 ± 25 psi (3447 ± 172 kPa)
Load Sense Relief Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3450 ± 50 psi (23 786 ± 345 kPa)
Lift Cylinder Holding Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Not adjustable
Telescope Cylinder Holding Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Not adjustable
Outrigger Holding Valves . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Not adjustable
Hoist Holding Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Not adjustable
Rated Pump Output at 2500 RPM:
Main Pump. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 gpm (106 L/min)
Hydraulic Speeds:
GENERAL DESCRIPTION
General
A hydraulic system uses liquid to make a transfer of force.
Any force on a confined liquid is applied to any point in the
system that the liquid reaches. Oil is used as the hydraulic
liquid for this system because the liquid must be a lubricant
for the components of the system.
There are several main components in a hydraulic system.
Each component has a specific function in the system.
The pump moves the oil through the system. It is important
to remember that the pump causes the flow, not the pressure
in the system. Pressure is caused by resistance to the flow.
This resistance can be external (for example, a load on a
cylinder or motor), or internal (the resistance of the
components of the system). Pressure increases as the
resistance to the flow increases. The pump will continue to
Cycle Times
1000 rpm 2500 rpm
Hoist Cylinder (full stroke):
Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Down. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
17 sec
14 sec
11 sec
8 sec
Telescope Cylinder (full stroke):
Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
90 sec
83 sec
32 sec
34 sec
Horizontal Outrigger Cylinders (Individual):
Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
14 sec
8 sec
11 sec
6 sec
Vertical Outrigger Cylinders (Individual):
Down. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
21 sec
17sec
15 sec
12 sec
Swing Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . – 2.0 rpm
Main Hoist Line Speed (Average) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 fpm (15.5 m/m) 126 fpm (38.4 m/m)
Reference Only