TM 9-4520-258-14
CHAPTER 4
UNIT MAINTENANCE INSTRUCTIONS
PAGE
Section I.
Repair Parts and Special Tools List ................................................................
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.
Lubrication Instructions....................................................................................
4-2
4-4
Lubrication Instructions ........................................................................................
4-2
Section III.
Service Upon Receipt........................................................................................
4-4
4-5.
Site Requirements ...............................................................................................
4-4
4-6.
Service Upon Receipt of Material ..................................................................... ...
4-5
4-7.
Installation Instructions ........................................................................................
4-6
Section IV.
Unit Preventive Maintenance Checks and Services (PMCS) ...........................
4-12
4-8.
General ...............................................................................................................
4-12
Section V.
Unit Troubleshooting Procedures....................................................................
4-26
4-9.
Introduction..........................................................................................................
4-26
4-10.
Troubleshooting ...................................................................................................
4-26
Section VI.
Unit Maintenance Procedures...........................................................................
4-54
4-11.
General ...............................................................................................................
4-54
4-12.
Personal Safety ...................................................................................................
4-54
4-13.
Proper Equipment................................................................................................
4-54
4-14.
Exhaust Pipe .......................................................................................................
4-55
4-15.
Duct Assembly.....................................................................................................
4-57
4-16.
Remote Control Thermostat.................................................................................
4-59
4-17.
Power Cable Adapter Cord ..................................................................................
4-66
4-18.
Control Box Cover Assembly ...............................................................................
4-70
4-19.
Top Panel Assembly............................................................................................
4-72
4-20.
Rear Panel Assembly ..........................................................................................
4-74
4-21.
Door Assemblies Side Rear and Side Front .........................................................
4-86
4-22.
Duct Cover Assembly ..........................................................................................
4-90
4-23.
Return/Supply Screen......................................................................................... .
4-92
4-24.
Control Box Assembly .........................................................................................
4-94
4-25.
Fuel Pressure Gage.............................................................................................
4-110
4-26.
Combustor Control Relay Assembly.....................................................................
4-112
4-27.
Air Pressure Switch .............................................................................................
..4-118
4-28.
Thermostat Assembly ....................................................................................... ...
4-124
4-29.
Combustor Fan Assembly....................................................................................
4-130
4-30.
Fuel Pump and Solenoid Valve............................................................................
4-136
4-1
