TM 5-4520-256-14
3-38. ELECTRODE MAINTENANCE - Continued.
b. Inspection.
(1) Inspect electrode for burned or corroded tip.
(2) Inspect insulator for cracks and signs of arc-over.
(3) Inspect studs for corrosion.
c. Cleaning.
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.
(1) Clean all metal parts with cleaning solvent (item 11, Appendix E).
(2) Allow to dry.
`d. Installation.
(1) Install studs (6 and 9) into electrodes (7 and 10).
(2) Install o-rings (8 and 11), onto electrodes (7 and 10).
(3) Install bushings (3 and 4) into block assembly (16).
(4) Install electrodes (7 and 10) into block assembly (16) with the o-rings (8 and 11) fitting half-way into the small
block.
(5) Aline the electrodes and set gap as shown in figure 3-53. Install setscrews (5 and 17).
(6) Install fire ring (15) and screw (13) into burner (14).
(7) Install block assembly (16) into burner (14) and position end of nozzle one inch from end of fire ring (15).
(8) Install three setscrews (12) into burner assembly (14).
(9) Install gasket (21) and burner assembly (14) into heat exchanger with the electrodes at the top.
(10)
Install eight flat washers (20), eight lockwashers (19), and eight nuts (18).
(11)
Connect ignition leads to electrodes (7 and 10).
(12)
Connect fuel line (1) to nozzle assembly (2).
Change 3 3-122
