Liebherr R 9350 - Manual (Page 4)

Arctic Kit
Electrical Preheating prior to Engine
Start
The hydraulic excavator can be preheated with an external electric power
supply (80 kW, 400 V, 50 Hz). The electric power supply must be connected
to the excavator through a connector situated on the cab elevation. The
following heating equipments are installed on the excavator and each heater
is designed to heat a part of the machine:
Electrically driven water
engine preheater units
________ 2 preheaters from 4 kW
automatic preheating/warm keeping (own
thermostat) of coolant of diesel engine
Electrically driven warm
air blowers
________________________ 6 blowers from 3 kW
automatic warm keeping (blowers with own
thermostat) of the ambient air temperature in
pumps compartment, main valves compart-
ment, cab elevation and engine compartment,
warm keeping of the hydraulic piloting units
and electric boxes
Electrical oil heater units
in the hydraulic tank ______ 7 resistors from 2 kW
automatic preheating/warm keeping (own
thermostat) of hydraulic oil in the hydraulic tank
in the splitterbox __________ 2 resistors from 500 W
automatic preheating/warm keeping (own
thermostat) of splitterbox oil
in the engine oil pan ______ 4 resistors from 500 W
automatic preheating/warm keeping (own
thermostat) of engine oil
in the suction pipes ______ 2 resistors from 500 W
automatic preheating/warm keeping (own
thermostat) of hydraulic oil in the suction pipes
Electrical heating cabin
windows
__________________________ filaments in the windshield and all the side
windows
automatic defrosting of the cabin windows
Electrical cabin preheater ____ 1 preheater from 3 kW
automatic preheating/warm keeping (own
thermostat) of the cabin
Heating covers around the
grease containers
______________ automatic preheating/warm keeping (own
thermostat) of the greasing tank
Heating covers around the
batteries
__________________________ automatic preheating/warm keeping (own
thermostat) of batteries
24 V resistor heating __________ resistors from 20 W and 150 W
automatic heating and drying of electric boxes
and operator’s seat
Two forced circulating
heating system
__________________ 2 preheaters from 9 kW
automatic preheating/warm keeping of all
working pumps, slew pumps, fan pumps, slew
motors, drive motors and valves blocs
Fuel preheater __________________ heat exchanger with warm engine coolant,
preheated fuel at the entry of the engine
Features of the Electrical Preheating
System
Electrical system is designed corresponding to europeen standards
400 V/230 V/50 Hz. Optionally the system can be delivered corre spond ing
to CSA standards.
– Different components with CSA approval
– Different tension and frequency 440 V/254 V/60 Hz
Safety IT-System
________________ isolated ground, monitoring of: short circuit,
overload, isolation; system reactions: warning
(acoustical/optical), shut down
Battery charge __________________ continuously during standstill
24 V board network ____________ continuous power supply
Accessory parts ________________ additional alternator to ensure 100 % lighting
and heating, additional battery pack for
emergency lighting
Electrical Heating After Engine Start
(without Electrical Supply)
Continuous flushing of swing and travel motors with an additional gear
pump, in order to supply oil at operating temperature even if travel or swing
functions are not actuated.
Continuous preheating fuel with a warm engine coolant heat exchanger.
Stand-by Heating Operation
If the machine is turned off for more than one hour and the ambient air
temperature is below – 10 °C, connect the external generator set to start the
heaters (auto-regulated) in order to maintain the excavator in predefined
temperature and to be able to restart quickly.
Heated areas
____________________ operator’s cab, cab elevation, valve bank
compartment, engine compartment
Heated components __________ engine and splitter box, main, slew, oil cooler,
watercooler pumps, batteries, travel, swing
motors, main valves blocks, electrical boxes
and joysticks, grease pumps and control valves
Steel Construction
The steel structures of the Liebherr standard excavators are good for
– 40 °C. Minimum required are Charpy impact values of 27 joule at minimum
ambient temperature.
Liebherr requirements:
for steel plates LH 380
________ 36 Joule at – 40 °C
for casting parts
for mining
________________________ AOD (Argon Oxygen Decarburizing) or
VLS (Very Low Sufur) steel > 60 Joule at – 20 °C
Operator’s Cab
Design ____________________________ increased thermal insulation at walls, roofs
and cab floor
Heating system __________________ heating capacity adapted to arctic conditions,
windshield and front side windows pre heated
to defrost, and also insulation glass, heated
operator’s seat (minimum temperature inside
the operator’s cab during standstill + 15 °C/
+ 59 °F)
Controls __________________________ electrical boxes and joysticks equipped with
24 V electrical heating elements
Insulation
Thermal insulated
components
______________________ complete power pack, main control valve
compartment, hydraulic tank module, fuel
tank and cab elevation, battery compartment,
cab roof, floor and walls, grease containers
Closed carbody openings ____ mechanically adjustable louvers to isolate the
excavator
– in front of engine radiator
– in front of hydraulic radiator
Snow protection for
engine air filter intake
__________ optional air intake from the engine compart-
ment is possible
Central Lubrication System
Design ____________________________ thermal insulated grease containers, large
nominal width for all grease lines, special
injector for cold climate
Heated components __________ electro thermal wrap around, both grease con-
tainers
Additionnal Measures
Low temperature
adapted lubricants
____________ for uppercarriage, for undercarriage
Undercarriage components
in – 40 °C version
________________ accumulators, track tensioning cylinder,
(standard track roller are good for – 40 °C)
Uppercarriage components
in – 40 °C version
________________ splitter box, gear pumps, accumulators,
fan drive motors
Attachment ______________________ use of special low temperature hoses for upper-
carriage to attachment and attachment hoses
4 R 9350 Arctic