Technical Data; Hydraulic Pressures; Rated Pump Output At 2500 Rpm; Hydraulic Speeds - Manitowoc Grove CD3340B Service Manual

HYDRAULIC SYSTEM

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:

Hoist Cylinder (full stroke):
Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Down. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Telescope Cylinder (full stroke):
Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Horizontal Outrigger Cylinders (Individual):
Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vertical Outrigger Cylinders (Individual):
Down. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Swing Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Hoist Line Speed (Average) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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.
4-2
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
Published 04/07/2015 Control # 569-00
CD3340B/YB4411
Cycle Times
1000 rpm
17 sec 11 sec
14 sec 8 sec
90 sec 32 sec
83 sec 34 sec
14 sec 11 sec
8 sec 6 sec
21 sec 15 sec
17sec 12 sec
– 2.0 rpm
51 fpm (15.5 m/m) 126 fpm (38.4 m/m)
2500 rpm