John Deere AC-70 - Manual (Page 23)

Service
Operator’s Manual 23
MAINTENANCE (CONTINUED):
NOZZLE ASSEMBLY:
1. Remove upper shell (See "Maintenance: Upper Shell
Removal")
2. Remove fan (See "Maintenance: Fan").
3. Remove fuel and air line hoses from nozzle assembly
(Fig. 16 or Fig. 17).
4. Turn nozzle assembly 1/4 turn to left and pull toward motor
to remove (Fig. 18).
5. Place plastic hex-body into vise and lightly tighten.
6. Carefully remove nozzle from the nozzle adapter using 5/8"
socket wrench (Fig. 19).
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 Fig. 19.
10. Attach nozzle assembly to burner strap (Fig. 18).
11. Attach fuel and airline hoses to nozzle assembly.
See "Maintenance: Fuel and Air Line Replacement
and Proper Routing".
12. Replace fan (See "Maintenance: Fan").
13. Replace fan guard and upper shell (See "Maintenance:
Upper Shell Removal").
FUEL AND AIR LINE REPLACEMENT AND PROPER
ROUTING:
1. Remove upper shell (See "Maintenance: Upper Shell
Removal").
2. Remove side cover screws using 5/16" nut driver (Fig. 12
or 13).
3. Remove side cover.
4. Inspect fuel and air line hoses for cracks and/or holes. If fuel
line hose is damaged, disconnect from nozzle adapter (Fig.
16 or 17) and from fuel filter (See "Maintenance:Fuel Filter").
If air line hose is damaged, disconnect from nozzle adapter
(Fig. 16 or 17) and from barb fitting on pump end cover (Fig.
20).
5. Install new air and/or fuel line. Attach one end of air line hose
to barb fitting on pump end cover (Fig. 20) and the other end
to nozzle adapter (Fig. 16 or 17). Attach one end of fuel line
hose to fuel filter (see "Maintenance: Fuel Filter") and the
other end to nozzle adapter (Fig. 16 or 17).
Note: Route hoses as shown in see Fig. 16 or 17, according to
model. Hoses are not to touch photocell bracket.
6. Replace side cover.
7. Replace upper shell and fan guard (See "Maintenance: Upper
Shell Removal").
(Fig. 18)
Nozzle/
Adapter
Assembly
Combustion
Chamber
Nozzle Face
Nozzle
Nozzle Sleeve
Nozzle Adapter
Air Line
Fitting
Fuel Line Fitting
(Fig. 19)
Air Hose
Pump End Cover
Barb
Fitting
115/165 Models 70 Models
Barb Fitting
(Fig. 20)