Section V. UNIT MAINTENANCE PROCEDURES
UNIT MAINTENANCE INTRODUCTION.
Instructions in this section provide general procedures to be followed for inspection, removal, cleaning, repair,
replacement, or installation of components and testing authorized at the unit level as specified by the Maintenance
Allocation Chart (MAC).
Perform the PMCS and lubrication instructions contained in Table 4-1.
Schedule the next preventive maintenance checks and services on DD Form 314, Preventive Maintenance
Schedule and Record.
All operational checks included in the maintenance procedures will include the techniques and methods required to ensure
the satisfactory performance of the Heater. Reference the operators instructions for starting, operating, and shutdown
INSPECTION OF COMPONENTS.
Examine bearings for rusted or pitted rollers, balls, races, or separator. Examine balls and races for abrasion
and/or serious discoloration. The following are conditions for bearing rejection:
Cuts or grooves parallel to ball or roller rotation.
Nicks and gouges outside race load areas are not cause for rejection unless deep enough to cause
bearing binding or misalignment.
Fatigue pits (as opposed to minor machine marks or scratches).
Clean all parts before inspection. Check for defects such as physical distortion, wear, cracks, and
Check all hose surfaces for broken or frayed fabric, breaks caused by sharp kinks, or chafing against other
parts of the unit. Inspect metal tubing lines for kinks. Inspect fitting threads for damage. Replace any defective part.
Check for leaks after assembly and during initial operation period.
Visually inspect all castings and weldments for cracks.
Inspect all wiring for chafed or burned insulation. Inspect all terminal connectors for loose connections and
Inspect gears and splines for cracks, pitting, and discoloration.