114278-01C
10
SERVICE PROCEDURES
Continued
Figure 13 - Air Output, Air Intake, and
Lint Filters, 165,000 Model 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 14).
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 specifications correct
pressure for each model (see Figure 15).
5. Remove pressure gauge. Replace pressure
gauge plug in filter end cover.
Figure 14 - Pressure Gauge Plug
Removal (70,000 Btu Model Shown)
Pressure
Gauge
Plug
Pressure
Gauge
Figure 15 - Adjusting Pump Pressure
(70,000 Btu Model Shown)
Relief
Valve
Pump
Model Pressure
70
4.7 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 16 or 17).
4. Carefully pry bushing, fuel filter, and lower
fuel line (165,000 model only) out of fuel tank
(see Figure 17).
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 16 - Fuel Filter Removal,
70,000 Model
Fuel Filter and
Bushing
Side Cover
Upper Fuel Line
Fuel Filter, Bushing,
and Lower Fuel Line
Upper Fuel Line
Side
Cover
Figure 17 - Fuel Filter Removal,
165,000 Model