Bird Technologies 8255 - Manual (Page 24)

Inspection
With the rugged and simple construction of the loads, pe-
riodic inspection will be necessary at only about six
month intervals. Inspection should include the items
listed below:
s Oil Leakage - check for coolant oil leaking
around the radiator tank, particularly at the
front and back around the underside of the
clamping band. If leakage is observed, refer to
the troubleshooting section and, check tight-
ness of the front and rear clamping bands.
s Inspect the load for completeness and general
condition of the equipment.
Preventive Maintenance
Due to the basic simplicity of construction, the major re-
quirement for preventive maintenance is to keep the
equipment clean, particularly the radiator fins. It is im-
portant to maintain the heat transfer efficiency of the
cooling fins.. Also, occasionally check the coolant level in
the radiator tank.
CAUTION
The unit is factory filled to the proper level with 0.8
gallons (3.03 liter) of Bird P/N 5-1070. No other coolant
should be used
Checking
Coolant Level
To check the coolant level:
1. Remove the vent plug from the socket on the top
surface of the expansion tank. Unscrew the vent
plug using a 3/4 wrench.
+
Note: The coolant level, at room temperature,
should not be more than 1/8 inch above the bot-
tom surface of the expansion tank.
2. Check the coolant level by carefully lifting the
front end of the load and noting presence of cool-
ant on the bottom surface. The coolant quantity
should be sufficient to fill the radiator cylinder.
The inner housing, for the resistor element, is
specially shaped to match the dielectric proper-
ties of the recommended coolant.
Bird Model 8251/52/55 Termaline Coaxial Load Resistor
12