Pump Pressure Adjustment; Fuel Filter - Desa 40,000 Owner's Manual

SERVICE PROCEDURES
Continued

PUMP PRESSURE ADJUSTMENT

1. Remove pressure gauge plug from filter end cover (see Figure 13).
2. Install accessory pressure gauge (part number HA1180).
3. Start heater (see Operation, page 5). 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 specifica-
tions correct pressure for each model (see Figure 14).
5. Remove pressure gauge. Replace pressure gauge plug in filter
end cover.
Pressure
Gauge
Plug
Figure 13 - Pressure Gauge Plug Removal (40/55/60/70 Models
Shown)
Pump
Model Pressure
40 3.0 PSI
55 3.4 PSI
60 3.4 PSI
70 4.7 PSI
110 5.3 PSI
115 5.3 PSI
150 5.4 PSI
155 5.4 PSI
165 5.6 PSI
200 6.2 PSI
Figure 14 - Adjusting Pump Pressure (40/55/60/70 Models Shown)

FUEL FILTER

(For 40/55/60/70/110/115/150/155/165 Models Only)
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 or 16).
4. Carefully pry bushing, fuel filter, and lower fuel line (110/115/
150/155/165 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.
108871
Relief
Valve
Pressure
Gauge
For more information, visit www.desatech.com
For more information, visit www.desatech.com
SERVICE PROCEDURES
Fuel Filter
and Bushing
Side Cover
Figure 15 - Fuel Filter Removal, 40/55/60/70 Models
Fuel Filter, Bushing,
and Lower Fuel Line
Side
Cover
Figure 16 - Fuel Filter Removal, 110/115/150/155/165 Models
9 9
Upper Fuel Line
Upper Fuel Line