Pump Pressure Adjustment; Fuel Filter; Spark Plug - L.B. White Tradesman K70 Owner's Manual

SERVICE
PROCEDURES
Continued
PUMP PRESSURE
ADJUSTMENT
1. Remove pressure gauge plug from filter
end cover.
2. Install accessory pressure gauge (part
number 500-20907).
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.
Correct Pump Pressure
70,000 BTU Unit: 4.0 PSI
150,000 BTU Unit: 5.0 PSI
5. Remove pressure gauge. Replace pres-
sure gauge plug in filter end cover.
Figure 7 - Pressure Gauge Plug Removal
150,000 BTU Unit Shown
Figure 8 - Adjusting Pump Pressure
150,000 BTU Unit Shown
104041

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 (150,000 BTU unit only)
out of fuel tank.
5. Wash fuel filter with clean fuel and re-
place in tank.
6. Attach upper fuel line to fuel filter neck.
7. Replace side cover.
Fuel Filter
Relief Valve
Location
Side Cover
Fuel Filter, Bushing,
and Lower Fuel Line
Pressure
Gauge Plug
Pressure
Gauge
Side Cover
Figure 9 - Fuel Filter Removal
OWNER'S MANUAL
Upper Fuel Line
70,000 BTU Unit
Upper Fuel Line
150,000 BTU Unit
9

SPARK PLUG

1. Remove upper shell (see page 8).
2. Remove fan (see page 8).
3. Remove spark plug wire from spark plug.
4. Remove spark plug from burner head
using 13/16" open-end wrench.
5. Clean and regap spark plug electrodes
as follows:
70,000 BTU unit – .055" gap
150,000 BTU unit – .075" gap
6. Install spark plug in burner head.
7. Attach spark plug wire to spark plug.
8. Replace fan (see page 8).
9. Replace fan guard and upper shell.
Burner
Head
Spark
Plug
Figure 10 - Spark Plug Removal
Figure 11 - Spark Plug Gap
Spark Plug
Wire
Bend Here to
Adjust Gap
Gap
Continued