OPERATING CONTROLS AND PROCEDURES MLC90A-1/MLC100-1 OPERATOR MANUAL
3-56
Published 12-10-19, Control # 258-05
COLD WEATHER HEATERS
To preheat critical components and lubricant sumps during a
cold weather shutdown, an optional Cold Weather Heater Kit
is available. The kit contains the following heaters:
See Figure 3-22
• Engine coolant heater (item 1) 750W.
• Engine oil heater (item 2) — 300W.
• Hydraulic tank heater (item 3) — 2,000 watt.
The hydraulic tank heater is designed to keep the
hydraulic oil temperature 30°F (17°C) warmer than the
ambient air temperature.
A thermostat (located under heater cover) is factory-set
to turn the heater on at 31°C (87°F) and off at 100°F
(38°C).
• Battery pad heaters (item 4) — two, 75W each with
thermostat (item 5) set at: ON 5°C (41°F) and OFF 15°C
(59°F).
The heaters are powered by the 240V AC Power Supply
described on page 3-54
.
Refer to Figure 3-21
for identification of the heater circuit
breakers.
NOTE When operating below –30°F (–34°C), the heater
package may not provide adequate protection.
Contact your Manitowoc dealer for
recommendations.
To turn the heaters ON, see Turning AC Power ON on
page 3-54.
To turn the heaters OFF, see Turning AC Power OFF on
page 3-54.
CAUTION
Avoid Machinery Damage
When the ambient temperature is above 30°F (–1°C) or
when the engine is running, do not turn on the engine oil
pan or coolant heaters. Doing so may result in
overheating because they are not supplied with a
thermostat.
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