Pump pressure adjustment, Fuel filter, Spark plug – Sears 583.35683 User Manual
Page 11
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Pump Pressure
Adjustment
1. Remove pressure gauge plug from
filter end cover.
2. Install accessory pressure gauge
(part number 583.35802).
3. Start heater (see Operation, page
7). 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.
4. Carefully pry bushing, fuel filter,
and lower fuel line (110,000 Btu/Hr
Model only) out of fuel tank.
5. Wash fuel filter with clean fuel and
replace in tank.
6. Attach upper fuel line to fuel filter
neck.
7. Replace side cover.
Spark Plug
(35/55,000 Btu/Hr Models)
1. Remove upper shell (see page 10).
2. Remove fan (see page 10).
3. Remove fuel and air line hoses
from nozzle assembly.
4. Remove spark plug wire from
spark plug.
5. Remove two screws using 5/16"
nut-driver and remove burner strap.
6. Place hex-body of spark plug into
vise and tighten.
7. Remove spark plug mounting nut
using 11/16" open-end wrench.
8. Remove burner strap from spark
plug.
9. Clean and regap spark plug
electrodes to .055" gap.
10.
Replace burner strap onto spark
plug. Rotate burner strap to
position spark plug electrodes (see
Figure 18, page 12).
Continued
Figure 14 - Fuel Filter Removal,
35155,000 Btu/Hr Models
Combustion
Chamber
Figure 15 - Fuel Filter Re
moval, 110,000 Btu/Hr Model
Figure 16 - Spark Plug Removal, 35/55,000 Btu/Hr Models
I№
Bend Here
to Adjust
Gap
.055" Gap
Figure 17 - Spark Plug Gap, 35/55,000 Btu/Hr Models