Filter
Top Products
116170-01A 11
www.desatech.com
SERVICE PROCEDURES
Continued
Figure 16 - Air Output, Air Intake, and
Lint Filters, 115/165 Models Only
Air Intake Filter
Filter
End
Cover
Lint Filter
Air Output Filter
6. Replace filter end cover.
7. Replace fan guard and upper shell.
IMPORTANT: Do not oil filters.
PUMP PRESSURE ADJUSTMENT
1. Remove pressure gauge plug from filter end
cover (see Figure 17).
2. Install accessory pressure gauge (part number
HA1180).
3. Start heater (see
Operation, page 6). 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 correct
pressure for each model (see Figure 18).
5. Remove pressure gauge. Replace pressure
gauge plug in filter end cover.
Figure 17 - Pressure Gauge Plug
Removal (70 Model Shown)
Pressure
Gauge
Plug
Pressure
Gauge
Figure 18 - Adjusting Pump Pressure
(70 Model Shown)
Relief
Valve
Pump
Model Pressure
40 3.0 PSI
55 3.4 PSI
70 4.7 PSI
115 5.1 PSI
165 5.6 PSI
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 19 or 20).
4. Carefully pry bushing, fuel filter, and lower
fuel line (115/165 Models only) out of fuel
tank (see Figure 20).
5. Wash fuel filter with clean fuel and replace in
tank.
6. Attach upper fuel line to fuel filter neck.
7. Replace side cover.
Figure 19 - Fuel Filter Removal,
40/55/70 Models
Fuel Filter and
Bushing
Side Cover
Upper Fuel Line
Fuel Filter, Bushing,
and Lower Fuel Line
Upper Fuel Line
Side
Cover
Figure 20 - Fuel Filter Removal,
115/165 Models