AIR OUTPUT, AIR INTAKE, and Lint Filters

Dayton Operating Instructions and Parts Manual

3VG79B

Dayton® Portable

Forced Air Heater

Maintenance (Continued)

5.Dry fan thoroughly.

6.Replace fan on motor shaft. Place fan hub flush with end of motor shaft (See Figure 6).

Fan

Motor

Flush

Motor

Shaft

Setscrew

Figure 6 - Fan Cross Section

7.Place setscrew on flat of shaft. Tighten setscrew firmly (40-50 inch-pounds).

8.Replace fan guard and upper shell.

1.Remove upper shell (See Figure 5, page 5).

2.Remove filter end cover screws using 5/16" nut-driver (See Figure 7).

3.Remove filter end cover.

4.Replace air output and lint filters.

5.Wash or replace air intake filter (See Preventative Maintenance Schedule, page 9).

6.Replace filter end cover.

7.Replace fan guard and upper shell.

IMPORTANT: Do not oil filters.

Air Intake Filter

Filter End Cover

Fan Guard

Lint Filter

Air Output

Filter

Figure 7 - Air Output, Air Intake, and Lint

Filters

PUMP PRESSURE ADJUSTMENT

1.Remove pressure gauge plug from filter end cover (See Figure 8).

2.Install accessory pressure gauge (Part Number HA1180) (See Figure 9).

3.Start heater (See Operation, page 5). Allow motor to reach full speed.

4.Adjust pressure to 6.2 psi. Turn relief valve to right to increase pressure. Turn relief valve to left to decrease pressure (See Figure 9).

5.Stop heater. Remove pressure gauge. Replace pressure gauge plug in filter end cover.

Relief Valve

Pressure

Gauge Plug

Figure 8 - Pressure Gauge Plug Removal

Pressure

Gauge

Figure 9 - Adjusting Pump Pressure

FUEL FILTER

1.Remove side cover screws using 5/16" nut-driver.

2.Remove side cover (See Figure 10, page 7).

3.Pull lower fuel line off fuel valve fitting.

4.Carefully pry bushing, lower fuel line, and fuel filter out of fuel tank.

5.Wash fuel ﬁlter with clean fuel and replace in tank.

6.Attach lower fuel line to fuel valve fitting.

7.Replace side cover.

FUEL VALVE

1.Remove side cover (See Figure 10), fan guard, and upper shell (See Figure 5, page 5) screws using 5/16" nut-driver.

2.Remove fan (See Fan, pages 5 and 6).

3.Pull lower fuel line off the fuel valve fitting (See Figure 11, page 7).

High Voltage.