OPERATING CONTROLS AND PROCEDURES RT765E-2 OPERATOR MANUAL
3-22 Published 4-09-2021, Control # 364-11
• At locations where explosive dust is found or
can be formed (example: coal, wood or grain
dust).
• There is a risk of suffocation when using the
heater!
• Do not operate the heater in enclosed spaces
(example: garages).
To activate the heater, ensure the fuel supply valve from the
heater fuel reservoir is turned to the ON position. Ensure the
battery disconnect switch is turned to the ON position and
push the activation button at the heater control panel. A
green light will illuminate indicating the system is activated.
The start-up and shutdown cycles may take approximately 2
minutes for initialization. Ensure the coolant, transmission
heater, swivel, battery heater, in-line fuel pump, in-line fuel
heater, and hydraulic reservoir heater are heating properly.
To de-activate the heater, push the button at the heater
control panel. The green light will turn off indicating the
system is de-activated. The shutdown cycle may take
approximately 2 minutes.
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.
Radiator Shutters
When starting the engine the shutters on the radiator will
close and will open when the coolant temperature reaches
71°C (160°F).
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, arti-
cles 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 die-
sel engine is running or is stopped as part of the programma-
ble 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: 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
• Heating at altitudes over 1,500 m - 3,000 m and (4,921 ft
- 9,842 ft)
Heating is possible for short periods at this altitude
(example: driving over a mountain pass or taking a break
while traveling between job sites).
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 (Grove part number 90037674). Contact an
authorized Grove 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.
If machine is equipped with cold weather package, ensure
air diverter is switched to outside air intake in ambient
temperatures above - 9°C (15°F).
Battery Heater
An in-line battery coolant heater circulates warm coolant
under the battery when the temperature is below
- 9°C (15°F). The battery coolant heater should be activated
2 hours before starting the crane to allow sufficient time to
preheat batteries and assist with easy start-up conditions.
If machine is equipped with cold weather package, ensure
battery heater coolant valve is switched off in ambient
temperatures above
-9°C (15°F).
Super Capacitor
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.
If crane has been left with battery disconnected for an
extended period of time, super capacitor will need up to 30
minutes to charge before having full cranking capacity.
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