Cleaning
Radiator
The principle maintenance required by the operator will be
the cleaning of the radiator fins. Keep the radiator of the
Model 8135 Termaline Load clean and free of dust. Wipe
away the accumulated dust and grime with a soft clean
cloth. If the insulator or metallic contact surfaces of the RF
input connector should become dirty or grimy, clean care-
fully with a soft clean cloth. Use self-drying, spray or aero-
sol contact cleaner that leaves no residue on the inaccessible
portions of the connector.
Inspection
Periodic Inspection - with the rugged and simple construc-
tion of the Model 8135 Termaline Load, periodic inspection
will be necessary at only about six month intervals. Inspec-
tion should include the items listed below:
Oil Leakage
Check for coolant oil seepage around the radiator tank, and
particularly at the front and back around the underside of
the clamping bands. See paragraph 5.1, Troubleshooting, if
leakage is observed. Check tightness of the clamping bands,
both front and back.
Cleanliness
Check for cleanliness of the radiator fins and the RF connec-
tor. Proceed as in paragraph Cleaning.
Completenes
s
Inspect the Model 8135 Termaline Load for completeness
and general condition of the equipment.
Preventive Maintenance
Most of the preventive maintenance procedures are covered
in the previous paragraph 5.5, Inspection. If any portions of
the radiator are corroded or rusted, clean the area carefully
with a fine flint sandpaper, and touch up the grey enamel.
RF Assembly Test
DC Resistance - Check the condition of the load resistor by
accurate measurement of the dc resistance between the in-
ner and outer conductors of the RF input connector. Use a
resistance bridge or ohmmeter with an accuracy of one per-
cent or better at 50 ohms for this purpose. The measured re-
sistance should be nominal 50 ohms. For greater accuracy,
the resistance of the load should be carefully checked prior
to use at ambient room temperature. This resistance value
should be recorded and used as a reference. Subsequent re-
sistance measurements should not deviate more than two
percent from this value.
Bird Model 8135 Termaline Coaxial Load Resistor
10
