TM 5-6115-590-12 attaching   hardware   and   remove   terminal   board   from power chassis. (2) Cleaning and Inspection. (a) Clean   terminal   board   with   filtered compressed air or wipe with a clean rag moistened with an approved cleaning solvent. (b) Visually  inspect  terminal  board  for evidence of cracks, corrosion, damaged threads or other evidence of damage. (3) Installation.    Install  replacement  terminal board in reverse order of removal. o. Relay K44. (1) Removal.    Unscrew  relay  connector  and pull the relay (fig.  4-38) from the connector (J4). (2) Cleaning and Inspection. (a) Wipe     relay     with     a     clean     rag moistened with an approved cleaning solvent. (b) Visually  inspect  relay  for  damaged pins for connector threads or other evidence of damage. (3) Test.    Apply  24V  DC  to  pins  A  and  B  of the relay and check that there is continuity between pins D and E.  Remove the 24V DC and check that the circuit between  pins  D  and  E  opens.    If  the  relay  does  not perform as outlined, it is defective (4) Installation.    Install  replacement  relay  in reverse order of removal. p. Wiring Harness Assembly. (1) Removal. Remove wiring harness assembly (fig.  4-37) only as required for access to other components or to replace damaged parts. NOTE Tag  or  otherwise  identify  all  connectors, terminals  and  wire  leads  and  location  of supporting clamp as removed to facilitate reassembly (2) Cleaning and Inspection. (a) Clean parts with filtered compressed air, or wipe with a clean rag moistened with an  approved  cleaning  solvent,  or  by  brushing  with  an electrician's brush. (b) Visually   inspect   for   burned,   bent, loose,  corroded  or  otherwise  damaged  connector  pins and terminals.  Inspect insulation for burns, chafing and deterioration.          Inspect     wiring     for     breaks,     loose connections   or   other   obvious   damage.      Replace   all damaged parts. (3) Repair.        Replace    damaged    terminals, connectors and receptacles by unsoldering connections, installing replacement part and soldering m accordance with    Military    Specification    MIL-S-6872    using    SN60 solder that conforms to Federal Specification QQ-S-571. 4-59.  Lower Electrical Power Chassis Assembly a. General.      The   lower   electrical   power   chassis assembly consists primarily of relays, transformers, and electrical harness assembles.  This paragraph describes    procedures    for    maintaining    the    chassis assembly.   Access  to  the  chassis  assembly  is  obtained by removing the engine and skid access panel shown in Figure    4-32.        Tag    or    otherwise    identify    electrical connections as they are removed to aid m reassembly. b. Wiring Harness Assemblies. (1) Removal. (a) Tag  and  disconnect  all  connectors and  electrical  leads  from  components  on  chassis  (fig 4-39) (b) Remove  all  securing  clamps    and mounting hardware and remove harness assemblies (2) Cleaning and Inspection. (a) Clean connectors with filtered compressed   air   and   wipe   wires   with   a   clean   rag moistened with an approved cleaning solvent. (b) Visually inspect harnesses for damaged   or   corroded   connectors,   frayed   or   burned insulation and evidence of other damage. (3) Test.  Test individual wires for continuity (4) Installation. Install replacement harnesses in reverse order of removal. c Relay (K1). (1) Removal.    Remove  terminal  post  cover from  relay.    Tag  and  disconnect  electrical  connections from   relay   Remove   four   screws   and   eight   washers Remove relay. (2) Cleaning and Inspection. (a) Clean relay with filtered compressed air or wipe with a clean rag moistened with an approved cleaning solvent. (b) Visually  inspect  relay  for  corrosion. cracks, damaged threads or other evidence of damage. (3) Installation.    Install  replacement  relay  in reverse order of removal procedures. d. Relay (K11). (1) Removal.    Remove  terminal  post  cover from  relay.    Tag  and  disconnect  electrical  connections from  relay.    Remove  four  screws  and  eight  washers. Remove relay (2) Cleaning and Inspection. (a) Clean relay with filtered compressed air or wipe with a clean rag moistened with an approved cleaning solvent (b) Visually  inspect  relay  for  corrosion. cracks, damaged threads or other evidence of damage. (3) Installation.    Install  replacement  relay  in reverse order of removal procedures. e. Relay (KI6). (1) Removal.    Tag  and  disconnect  electrical connections and bus bars from relay.  Remove attaching screws   and   washers   and   remove   relay   from   power chassis 4-93