TM 10-4520-259-13&P
CHAPTER 4
UNIT MAINTENANCE INSTRUCTIONS
PAGE
Section I
Repair Parts; Tools; Special Tools;
Test Measurement and Diagnostic
Equipment (TMDE); and Support Equipment.......................................
4-2
4-1
Common Tools and Equipment............................................................
4-2
4-2
Special Tools, TMDE, and Support Equipment ....................................
4-2
4-3
Repair Parts.........................................................................................
4-2
Section II
Service Upon Receipt ..........................................................................
4-2
4-4
Unpacking............................................................................................
4-2
4-5
Inspecting Unpacked Water Heater......................................................
4-2
4-6
Processing Unpacked Water Heater....................................................
4-3
Section III
Unit Preventive Maintenance Checks and
Services (PMCS) .................................................................................
4-3
4-7
General................................................................................................
4-3
4-8
Unit PMCS Procedures........................................................................
4-3
Section IV
Unit Troubleshooting Procedures............................................................................
4-8
4-9
General................................................................................................
4-8
4-10
General Instructions.............................................................................
4-8
4-11
Troubleshooting...................................................................................
4-8
Section V
Unit Maintenance Procedures.................................................................................
4-17
4-12
General................................................................................................
4-17
4-13
Fuel Supply Control Assembly.............................................................
4-18
4-14
Burner Head Assembly........................................................................
4-21
4-15
Smokestack and Guard Assembly (M-80)/
Exhaust Duct (M-85)............................................................................
4-28
4-16
Ignition Transformer Assembly.............................................................
4-30
4-17
Electrical Components.........................................................................
4-34
4-18
Ignition Cable Assemblies....................................................................
4-41
4-19
Fuel Filter Assemblies (M-80) and (M-85) ............................................
4-43
4-20
Fuel Pump Assemblies ........................................................................
4-48
4-21
Water Vessel and Skid Assemblies......................................................
4-49
4-22
Upper and Lower Manifold Assembly...................................................
4-51
4-23
Drum Fill Adapter Assembly, Type II ....................................................
4-54
4-1
