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116170-01A 13
www.desatech.com
SERVICE PROCEDURES
Continued
NOZZLE ASSEMBLY
1. Remove upper shell (see Upper Shell Re-
moval, page 10).
2. Remove fan (see
Fan, page 10).
3.
Remove fuel and air line hoses from nozzle as-
sembly (see Figure 23, page 12 or Figure 24).
4. Turn nozzle assembly 1/4 turn to left and pull
toward motor to remove (see Figure 25).
5. Place plastic hex-body into vise and lightly
tighten.
6. Carefully remove nozzle from the nozzle adapter
using 5/8" socket wrench (see Figure 26).
7. Blow compressed air through face of nozzle.
This will free any dirt in nozzle area.
8. Inspect nozzle sleeve for damage.
9. Replace nozzle into nozzle adapter until
nozzle seats. Tighten 1/3 turn more using 5/8"
socket wrench 4.5 to 5.1 N-m (40 to 45 in-lbs).
See Figure 26.
10. Attach nozzle assembly to burner strap (see
Figure 25).
Nozzle/
Adapter
Assembly
Combustion
Chamber
Air Line
Hose
Nozzle
Adapter
Bracket
Figure 24 - Removing Air and Fuel Line
Hoses (115/165 Models Only)
Fuel
Line
Hose
Photocell
Bracket
Figure 25 - Removing Nozzle/Adapter
Assembly
Nozzle/
Adapter
Assembly
Combustion
Chamber
Figure 26 - Nozzle and Nozzle Adapter
Nozzle Face
Nozzle
Nozzle Sleeve
Nozzle Adapter
Air Line
Fitting
Fuel Line Fitting
11. Attach fuel and airline hoses to nozzle as-
sembly. See Fuel and Air Line Replacement
and Proper Routing, page 14.
12. Replace fan (see
Fan, page 10).
13. Replace fan guard and upper shell (see Upper
Shell Removal, page 10).