MIL-HDBK-1138
Table 8 (Continued)
Problem
Solution
Icing in idle units
Pump units dry routinely.
Icing in gear units
Install heat tapes on drain
line.
Drain water in bullgear after
rain and when temperature
rises.
Hoses and hydrants freeze
Leave lines on.
Drain lines after use.
Traveling bridge controls
Build enclosure over controls.
ice-up
Icing of bus bar for bridges
Install heat guns or warm air
blower.
Switches on monorakes freeze
Shut off units in snow and ice
to prevent freezing.
Accumulation of snow on
Shut down rake during
monorake rails stops wheels
snowstorms and remove snow.
Automatic sampler freezes
Build insulated boxes heated
with a 100-watt lightbulb.
Waste activated sludge lines
Locate lines deeper.
freeze
Install proper drainage.
Source: Taken in part from U.S. Army CRREL Special Report 85-11.
Caution: Take care during this operation since
slippery footing, loss of equipment (attach lines and floats),
and damage may result during ice removal.
Covering clarifiers will eliminate many of these
potential problems. When designing covers, consider snow loads,
weatherproofing of electrical controls, and the possibility of
humidity within the covers.
7.3.2
Mechanical and Electrical Equipment Protection.
The viscosity of lubricating oils will change as a result of
freezing temperatures. The operator can either change the oil to
suit the expected temperature range or use heat tape or
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