(1) Using a dry cloth, wipe dirt and lint from the doors and bottom cover. Remove greasy or gummy spots with a
cloth dampened with solvent (P-D-680).
(2) Inspect the door hinges for bends or other damage which prevents the doors from closing properly. Replace
the entire door if it will not close.
(3) Replace the bottom cover if it is bent so much that the heater cannot be mounted level.
(4) Touch up any unpainted areas to prevent corrosion.
(5) Replace the stud turnlock fasteners if the slotted heads are stripped or if they do not hold the doors securely
c. Reassembly. Reverse the disassembly procedure.
All four data plates (fig. 4-20) should be check for legibility, and replaced if they are not legible. All but the one
which is embossed on the control box cover are riveted. If rivets are loose, drill them out and replace. The control box
cover contains electrical components, and should be replaced only by direct support maintenance.
Figure 4-20. Data Plates.