RT800E OPERATOR MANUAL
OPERATING CONTROLS AND PROCEDURES
Radiator Shutters
Super Capacitor
When starting the engine the shutters on the radiator will close and will open when the coolant temperature reaches 71°C (160°F).
The super capacitor provides additional cranking during cold weather startup. The super capacitor is connected to the standard batteries with an isolation relay. The positive relay feed is activated when the key is in the crank and run positions.The super capacitor allows the starter to be cranked for 30 seconds then cycled off for 60 seconds before cranking again until the engine starts.
Auxiliary Cab Heater The superstructure crane cab is heated with an auxiliary air heating system that runs independently of the engine. The heat is generated by burning fuel taken from the heater fuel reservoir. To heat the operator’s cab, activate the auxiliary diesel heater and adjust the temperature control switch mounted in the overhead panel. The fan for the heating system delivers warm air into an air distribution box. The air is circulated according to the setting of the controls and then delivered into the crane cab by a fan through the various air extraction and air delivery vents. Do not cover the vents with bags, articles of clothing or any other objects. Keep the hot air inlet and hot air outlet free of dirt and foreign bodies. Soiled or blocked hot air lines may cause overheating, and result in damage. The crane auxiliary cab heater can be operated while the diesel engine is running or is stopped as part of the programmable auxiliary heating system). The standard hot water crane cab heater can also be turned on after the engine has started and is warmed to operating temperature. NOTE:
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When using the heater at high altitudes, the factory heater setting will need to be re-calibrated for proper heater operation.
Heating at altitudes up to 1,500 m (4,921 ft) Unlimited heating is possible
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Diesel Fuel Diesel fuel with low temperature characteristics is required to operate the engine down to an ambient temperature range from - 40°C (-40°F) to 49°C (120°F). Refer to the applicable engine manual for proper specifications. Use the correct grade of fuel for the prevailing temperature. Diesel fuel should have a cloud point of 6°C (10°F) less than the lowest expected temperature. In case of emergency, kerosene may be added to the fuel to bring the cloud point down to the required temperature.This will minimize clogging of filters and small passages by wax crystals. The addition of kerosene is NOT recommended for general use. Refer to the Cold Weather Package and Lubricants, page 5-3 of this operator manual.
CAUTION Engine Damage Hazard! If “Ultra Low Sulfur” fuel is not used in engines that require it, the engine warranty will be void and the engine performance will quickly deteriorate and may stop running.
Heating at altitudes over 1,500 m - 3,000 m and (4,921 ft - 9,842 ft)
Operation Below -40°C (-40°F)
Heating is possible for short periods at this altitude (example: driving over a mountain pass or taking a break while travelling between job sites).
For crane operation below -40°F, capacities shall be derated 3.67% of the capacities shown on the load chart for each 1.8°F below -40°F (1°C below -40°C).
During longer stays, (example: construction job project), the fuel supply must be adjusted to the altitude or the heater will malfunction. This can be done by installing an air pressure sensor kit (Manitowoc part number 90037674). Contact an authorized Manitowoc distributor or Manitowoc Crane Care for additional assistance. NOTE:
Accelerated discharging of battery will occur when the crane engine is switched off. If you run the heater while the crane engine is stopped, the batteries voltage will need to be recharged after short periods of time.
Air Diverter An air diverter directs warmed air collected from under the engine hood when the temperature is below -9°C (15°F) to preheat the air intake going to the engine.
Grove
CRANE WARM-UP PROCEDURES The following procedures detail the actions that must be taken to properly warm the different crane components before operating the crane. NOTE:
For temperatures below -9°C (15°F) refer to arctic lubricants and conditions in the Operator and Service Manuals.
Before starting the crane, ensure the appropriate lubricants are used for the prevailing ambient temperatures in which the crane will operate in (a list of lubricants and their temperature ranges can be found in the Lubrication section of your crane’s Operator Manual, by contacting your local Manitowoc distributor, or by contacting Manitowoc Crane Care directly).
Published 04-05-2017 Control # 307-08
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