Liebherr LRB 255 User Manual

Technical data

Piling and drilling rig

LRB 255

Concept and characteristics

Leader top for auxiliary rope	Rope crowd system
Tool with quick connection	Auxiliary winch
Leader	Lateral inclination device
Leader support arm	Longitudinal inclination device
Vertical travel device	Support arm brace
Leader rotation device	Radius adjustment device
Undercarriage	Uppercarriage

•High engine output with automatic engine speed control

•Controlled entirely from cab

•Sturdy and solid rig design

•Wide longitudinal and lateral supporting system on the basic machine through triangles

•High push and pull forces

•High torque

•Completely self–rigging (no auxiliary machines required)

•Large range of working tools (all piling and drilling works can be performed)

•Stepless leader inclination 1:6 forward – 1:3 backward depending on type of equipment

•Leader swing range ± 90º

•Increase of effective leader length (3 m) via vertical travel device

•Automatic vertical alignment

•High alignment forces

•Simultaneous control of several movements via Load–sensing multi–circuit hydraulics

•Quick change of equipment possible through quick connection

•Equipment design according to latest European regulations and standards

•High manufacturing quality through quality control by PDE–system

2 LRB 255

Transport dimensions and weights

	22085		3200
		1245	400	3950
			900
7725	5890	8470	3490

Transport with leader

includes the basic machine (ready for operation) with leader, without working tools (such as rotary, Kelly bar etc.) and without counterweight.

Dimensions and weights

Leader length

21.2 m

24.2 m

27.2 m

30.2 m

Weight complete

without counterweight*

68.3 t

69.4 t

70.6 t

71.8 t

		22085				2850
							1670
Transport leader			Dimensions and weights
includes the leader without working tools			Leader length	21.2 m	24.2 m	27.2 m	30.2 m
(such as rotary, Kelly bar etc.).			Weight	27.3 t	28.4 t	29.6 t	30.8 t
7150	3200
1245		3300					1370
	900	400		3070		800
	1690
5890	3490

Transport basic machine				Weights
ready for operation				Counterweight		12.5 t
Basic machine*		41 t

*) Weights can vary with the fi nal confi guration of the machine.

LRB 255 3

Dimensions

Basic machine LRB 255

1:6	1:3

21200 (24000) [27200] {30200}

2.8°

2.8°

800
4000	4230	900
5700		4700

90°

90°

R4200

Technical data

Leader length

21/24/27/30 m

Capacity hammer including cap plus pile

30 t

Max. hammer weight

15 t

Max. pile weight

15 t

Max. pull, leader on ground

450 kN

Max. torque

300 kNm

Working radius machine

center of rotation — front edge leader

3.2 — 4.9 m

Stepless rig inclination adjustment

Lateral inclination

± 1:20

Forward inclination

1:6

Backward inclination

1:3

Vertical leader adjustment

above ground level (depending on radius)

3 m

below ground level (depending on leader length)

5 m

Leader swing range

± 90°

Operating weight and ground pressure

Total weight with 900 mm 3–web shoes				80.8 t
Ground bearing pressure				0.91 kg/cm2

The operating weight includes the basic machine LRB 255 (leader length 21.2 m, without working tools) and 12.5 t counterweight.

4 LRB 255

Technical data

 Engine

Power rating according to ISO 3046, 670 kW (898 hp) at 1900 rpm

Engine type			MAN D 2842 LE
Fuel tank			795 l capacity with continuous level

 indicator and reserve warning

Engine complies with NRMM exhaust certification EPA/CARB Tier 2.

 Hydraulic system

The main pumps are operated by a distributor gearbox. Axial piston displacement pumps work in open circuits supplying oil only when needed (flow control on demand).

The hydraulic pressure peaks are absorbed by the integrated automatic pressure compensation, which relieves the pump and saves fuel.

Pumps for working tools						2x 400 l/min and 1x 350 l/min
Separate pump for kinematics										129 l/min
Separate pump for crowd system								300 l/min
Hydraulic oil tank							1000 l
Max. working pressure									350 bar

No auxiliary power packs are required as application specific hydraulics supply power to all components.

The cleaning of the hydraulic oils occurs via an electronically monitored pressure and return filter.

Any clogging is shown on the display in the cab.

The use of synthetic environmentally friendly oil is also possible.

 Control

The control system – developed and manufactured by Liebherr – is designed to withstand extreme temperatures and the many heavy– duty construction tasks for which this machine has been designed. Complete machine operating data are displayed on a high resolution monitor screen. A GSM modem allows for remote inquiry of machine data and error indications. To ensure clarity of the information on display, different levels of data are shown in enlarged lettering and symbols.

Control and monitoring of the sensors are also handled by this high technology system. Error indications are automatically displayed on the monitor in clear text. The machine is equipped with proportional control for all movements, which can be carried out simultaneously. Two joysticks are required for operation. Pedal control can be changed to hand control.

Options :

PDE : Process data recording

 Main winch with freefall

Line pull (effective)					200 kN
Rope diameter						30 mm
Line speed				0 - 89 m/min

 Auxiliary winch

Line pull (effective)							80 kN
Rope diameter								20 mm
Drum diameter						320 mm
Line speed					0 - 48 m/min

 Crawlers

Propulsion through axial piston motor, hydraulically released spring loaded multi–disc brake, maintenance free crawler tracks, hydraulic chain tensioning device.

Drive speed				0 – 1.5 km/h
Track force						622 kN
Width of 3-web track shoes					900 mm

 Swing

Consists of triple-row roller bearing with external teeth and two swing drives, fixed axial piston hydraulic motor, spring loaded and hydraulically released multi–disc holding brake, planetary gearbox and pinion. Selector for 3 speed ranges to increase swing precision. Swing speed from 0 – 4.5 rpm is continuously variable.

 Rope crowd system

Crowd force  push/pull					450/450 kN
Line pull (effective)							150 kN
Rope diameter								24 mm
Line speed						0 - 87 m/min

The winches are noted for compact, easily mounted design. Propulsion is via a maintenance-free planetary gearbox in oil bath. Load support by the hydraulic system; additional safety factor by a spring–loaded, multi–disc holding brake. All line pull values are effective values. The efficiency factor of approx. 25% has already been deducted.

 Noise emission

Noise emissions correspond with 2000/14/EC directive on noise emission by equipment used outdoors.

LRB 255  5