Maintenance Kits, Adjusting Pump Pressure

Dayton Operating Instructions and Parts Manual

3E358B and 3E359B

Dayton® Portable

Oil-Fired Heaters

PUMP PRESSURE ADJUSTMENT FOR HEATERS WITH FUEL FILTER INTER- NAL TO PUMP

6. Remove pressure gauge. Replace psi pressure gauge plug in fuel pump

port marked “GAUGE.”

1.Remove pressure gauge plug from fuel pump port marked “GAUGE.”

2.Install accessory pressure gauge (part number 110380-01) to fuel pump port marked “GAUGE” (See Figure 20). Do not use bleeder valve port to check pressure. Bleeder valve port contains pressure higher than operating pressure. Setting pump pressure with gauge in bleeder valve port will result in wrong operating pressure.

3.Start heater (See Operation, page 5). Allow motor to reach full speed.

4.Adjust pressure. Use small flat blade screwdriver to turn slotted screw at fuel pump port at top right side of pump. Turn screw clockwise to increase pressure. Turn screw counterclockwise to decrease pressure. See specifications below for correct pressure for each model.

5.Stop heater (See To Stop Heater, page 6).

6.Remove pressure gauge. Replace pressure gauge plug in fuel pump port marked “GAUGE.”

	Pump
Model	Pressure
Model 3E358B	100 psi
Model 3E359B	110 psi

Pressure

Gauge

Fuel Pump Port Marked “GAUGE”

Pressure

Adjustment

Port

Figure 20 - Adjusting Pump Pressure

PUMP PRESSURE ADJUSTMENT FOR HEATERS WITH FUEL FILTER/CANIS- TER EXTERNAL TO PUMP

1.Remove pressure gauge plug from fuel pump port marked “GAUGE.”

2.Install accessory pressure gauge (part number 110380-01) to fuel pump port marked “GAUGE” (See Figure 21).

3.Start heater (See Operation, page 5). Allow motor to reach full speed.

4.Adjust pressure. Use small flat blade screwdriver to turn slotted screw at fuel pump pressure adjusting port.

Turn screw clockwise to increase pressure. Turn screw counterclock- wise to decrease pressure. See specifications, next column, for correct pressure for each model.

5.Stop heater (See To Stop Heater, page 6).

	Pump
Model	Pressure
Model 3E358B	100 psi
Model 3E359B	110 psi

Fuel Pump

Pressure

Gauge

isp

Fuel Pump Port

Fuel Pump Port Marked “PRESS ADJ”

Marked “GAUGE”

Figure 21 - Adjusting Pump Pressure