TM 5-4520-256-14
3-33. TUBE ASSEMBLIES MAINTENANCE.
This Task Covers:
a. Removal
b. Inspection
c. Cleaningd. Installation
INITIAL SETUP:
Tools Required:
Tool Kit, General Mechanics
Materials Required:
Cleaning Solvent (Item 11, Appendix E)
WARNING
Cleaning solvent, Federal specification P-D-680, is toxic and flammable. Use only in a well-
ventilated area. Avoid prolonged breathing of fumes. Keep solvent away from flames. Do not
use in excessive amounts. Avoid skin contact.
Equipment Conditions:
Heater unit shut down and cool.
Power cable disconnected from power source.
Access door and air filters removed (para 3-10a).
a. Removal.
(1) Tag both ends of the tube assembly and connection points for tubes.
(2) Remove tube assembly by loosening nuts at each tube end and remove tube assembly.
b. Inspection.
(1) Inspect tube connector for damaged or stripped threads and corrosion.
(2) Inspect tube assembly (including flared end) for cracks, pin holes, bends, dents, and corrosion.
Change 3 3-102.9/(3-102.10 blank)
