Manitowoc 777 User Manual

Reference Only
OPERATING CONTROLS AND PROCEDURES 777 OPERATOR’S MANUAL
3-64 Published 10-01-12, Control # 044-05 v2
COLD WEATHER HEATER PACKAGE
General
The heaters provided in the cold weather heater package
preheat critical machinery and lubricant sumps during cold
weather shutdown. Figure 3-37 identifies heater
components.
A 777 working in an arctic climate — outside temperature
continuously below 0°F (-18°C) to -30°F (-34°C) — should
be equipped with the heaters identified in this topic and
lubricated with the lubricants listed in Section 5 of this
manual.
Heaters
The heaters operate on electrical power supplied by an
owner furnished external power supply.
120 Volt AC Option
The heater package includes the following:
• Engine Oil Sump (300 watts)
• Hydraulic Oil Tank (two, 500 watts each)
• Control Console (30 watts)
NOTE: A 1,500 watt engine coolant heater is supplied as
standard equipment with the engine. This heater
has its own cord. The total power requirement for
the heater package plus the coolant heater is 2,830
watts.
240 Volt AC Option
The heater package includes the following:
• Engine Oil Sump (300 watts)
• Engine Coolant (1,000 watts)
• Hydraulic Oil Tank (two, 500 watts each)
• Control Console (125 watts)
Thermostats
Thermostats turn the heaters on and off at the temperatures
listed below.
Turning Heaters On
1. Check that external power supply is off.
2. Connect external power supply cord to cord at hydraulic
tank on crane.
3. Turn on external power supply.
Turning Heaters Off
1. Turn off external power supply.
2. Unplug external power supply cord from cord at
hydraulic tank on crane.
CAUTION
Machinery Damage!
Operating in an arctic climate without heaters can
damage machinery during cold weather start-up due to
lack of lubrication.
Heater package described in this topic may not provide
adequate protection when operating below -30°F (-34°C).
Contact Service Department at factory for
recommendations.
CAUTION
Hydraulic Pump Damage!
To prevent damage to pumps, warm hydraulic oil to 60°F
(16°C) minimum before operating crane in an arctic
climate.
Heater Heater On Heater Off
Hydraulic Oil
Reservoir
60°F (16°C) 80°F (27°C)
Engine Oil Sump 60°F (16°C) 80°F (27°C)
Control Console 50°F (10°C) 60°F (16°C)
WARNING
Electrocution Hazard!
Severe electric shock can cause death or serious injury.
Crane owner/user must make provisions for turning off
electrical power supply before connecting and
disconnecting power supply cords

Manitowoc 777 Specifications

General

Brand	Manitowoc
Model	777
Category	Construction Equipment
Language	English