TM9-4120-400-14
HEATER ELEMENTS (HR1-HR6 3 phase units) and (HR1-HR4 single phase
4-43.
units). - c o n t i n u e d
Figure 4-38. Heater Elements
INSPECTION
Visually inspect each heater for obvious damage, deformation, cracked or broken sheath, burnt out spots, and
loose, broken, or otherwise damaged leads.
TESTING
Using a multimeter check continuity of each heating element. Continuity should be indicated.
REMOVAL
1.
Tag and disconnect leads from terminal board TB2.
2.
Remove two screws (1), lock washers (2), and flat washers (3) and remove heater support (4).
Remove three screws (5) and lock washer (6) from heater mounting bracket (7).
3.
4.
Slip bracket up enough to gain access to top heater.
5.
Remove retaining nut (8), lock washer (9), flat washer (10), and insulating washer (11) and slip heater (12) out
of bracket.
Remove remaining heaters using same methods as (4) and (5) above.
6.
CLEANING
Use a clean dry cloth to wipe dust and dirt from heaters. Do not use solvent or detergent.
4-105
