Heater Element Assembly Replacement.
This task covers:
Shop Equipment, Automotive Maintenance and
Power shut off, power panel and rear control panel
ECU covers and doors opened or removed
ECU work platform installed (reference
CBPS contains high electrical currents. To prevent electrical shock when working on
electrical system, ensure that power cable is disconnected from power panel and ECV
batteries are disconnected per TM 9-2320-387-24-1. Tag power panel and battery area with
sign that states that the power must remain OFF while work is being performed.
Remove jewelry and observe all safety rules for working around high voltage.
Remove/disassemble only to the extent necessary to remove or replace defective
assemblies/components. Use standard maintenance shop practices/procedures.
Remove twelve nuts and twelve flat washers securing leads to twelve posts on top of heater
element assembly (1). Tag and remove leads.
Remove three screws (2), three lockwashers (3), three flat washers (4), three nuts (5), three
lockwashers (6) and three flat washers (7) securing heater element assembly (1) to ECU
enclosure (8). Remove heater element assembly (1). Discard three lockwashers (3) and three
Remove two nuts (9), two lockwashers (10) and two flat washers (11) securing guard (12) to
heater assembly rear bracket (17). Discard two lockwashers (10).
Remove six screws (13), six lockwashers (14) and six flat washers (15) securing two retainer
plate assemblies (16) to heater assembly rear bracket (17). Discard six lockwashers (14).
Remove two screws (18), two lockwashers (19) and two flat washers (20) securing overheat
switch bracket (21) to front bracket cover (22). Discard two lockwashers (19).
Remove four screws (23), four lockwashers (24) and four flat washers (25) securing front bracket
cover (22) to heater assembly front bracket (26). Discard four lockwashers (24).
Remove 24 screws (27), 24 lockwashers (28) and 24 flat washers (29) securing six heating
elements (30) to heater assembly front bracket (26). Discard 24 lockwashers (28).