Pump Pressure
Adjustment
1.Remove pressure gage plug from fuel pump port marked “GAGE.”
2.Install accessory pressure gage (part number M4574) to fuel pump port marked “GAGE” (see Figure 10).
3.Start heater (see Operation, page 8). Allow motor to reach full speed.
4.Adjust pressure to 100 psi. Use small flat blade screw- driver to turn slotted screw at fuel pump port marked “PRESS ADJ.” Turn screw clockwise to increase pressure. Turn screw counterclockwise to decrease pressure.
5.Remove pressure gage. Replace pressure gage plug in fuel pump port marked “GAGE.”
Pump
(Procedure if pump is binding)
1.Remove upper shell (see page 14).
2.Loosen hex screw on flange clamp at rear of motor with 5/16"
3.Turn fan with hand (see Figure 12).
4.If fan turns freely, tighten screw on flange clamp.
5.If fan does not turn freely, replace pump.
6.Replace upper shell.
Fuel Lines
(Procedure for tightening fuel lines)
1.Remove upper shell (see page 14).
2.Use 7/16" wrench and tighten fuel lines at solenoid valve (see Figure 13), pump, and pump fuel filter assembly (see Figure 14).
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Pressure | Fuel Pump Port | |
Marked “PRESS ADJ” | ||
Gage | ||
|
Fuel Pump Port
Marked “GAGE”
Figure 10 - Adjusting Pump Pressure
Hex Screw On
Flange Clamp
Figure 11 - Location of Screw | Figure 12 - Turning Fan with Hand | |
on Flange Clamp |
| |
Burner Head | Pump | |
Fuel Filter | ||
| ||
| Assembly | |
| Pump |
| Fuel |
Solenoid | Line |
| |
Valve | Fuel |
| Lines |
Figure 13 - Fuel Line at | Figure 14 - Fuel Lines at Pump and |
Solenoid Valve | Pump Fuel Filter Assembly |
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