Pump Pressure

Adjustment

1.Remove pressure gauge plug from filter end cover.

2.Install accessory pressure gauge (part number HA1180).

3.Start heater (see Operation, page 8). Allow motor to reach full speed.

4.Adjust pressure. Turn relief valve to right to increase pressure. Turn relief valve to left to decrease pressure. See specifications at right for correct pressure for each model.

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

Fuel Filter

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

2.Remove side cover.

3.Pull upper fuel line off fuel filter neck (see Figure 15).

4.Carefully pry bushing, fuel filter, and lower fuel line (100/150 models only) out of fuel tank (see Figure 16).

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

6.Attach upper fuel line to fuel filter neck.

7.Replace side cover.

(35/50/70 Models Shown)

Pressure

 

 

Relief

 

 

Valve

Gauge

 

 

 

 

 

Plug

 

 

 

 

 

 

Pressure

Figure 13 - Pressure Gauge Plug Removal Gauge

 

Pump

 

Model

Pressure

 

35

3

PSI

 

50

3.6

PSI

 

70

4

PSI

 

100

4

PSI

 

150

5

PSI

Figure 14 - Adjusting Pump Pressure

 

 

 

Fuel Filter

Side Cover

Upper Fuel Line

35/70 FUEL FILTER REMOVAL

PFA/P 037A

Figure 15 - Fuel Filter Removal, 35/50/70 Models

Fuel Filter, Bushing,

and Lower Fuel Line

Upper

Fuel

Line

Side Cover

Figure 16 - Fuel Filter Removal, 100/150 Models

099618

13

Page 13
Image 13
Desa 50 owner manual Pump Pressure Adjustment, Fuel Filter

50 specifications

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