TEST OR INSPECTION
Figure 4-9. Dryer tumbler burner nozzle, removal and installtion
Clean all parts in a well-ventilated area. Avoid inhalation of solvent fumes and prolonged exposure
of skin to cleaning solvent. Wash exposed skin thoroughly. Dry cleaning solvent (Fed. Spec. P-
D-680) used to clean parts is potentially dangerous to personnel and property. Do not use near open
flame or excessive heat. Flash point of solvent is 100 to 138F. (38 to 59C.
b. Clean the burner nozzle using cleaning solvent, Fed. Spec. P-D-680. and dry thoroughly.
c. Install the burner nozzle and secure by turning clockwise.
Step 4. Check for improper electrode gap.
a. Remove tumbler burner electrode and nozzle.
to figure 4-10 and adjust the burner ignition gap
(1) Adjust ignition electrodes (1 and 2, fig. 4-10) by bending until a 3/16 inch
(.4763 cm) clearance exists between inside edge of electrode tips.
When bending electrodes, exercise care to prevent cracking the porcelain, (3 and 4).
(2) Adjust clearance between the center of the fuel nozzle tip (5) and the
edge of the electrode to 1/4 inch (.64 cm).
(3) Install tumbler burner electrode and nozzle.