Top View of Screed Junction Box
Trouble and Remedies for Oil Burner
1. No Oil Spray and No Ignition
(a) Check instrument panel switch for ON. It is also the system circuit breaker and may have tripped
immediately by an overload.
(b) Check junction box burner switch for ON.
(c) Check solenoid valve selector switch (located close to valves on RH side of burner). It has three
positions, BURNER-OFF-SPRAY DOWN.
(d) Check wiring to switches. There should be 12 volts DC at the power terminal. (Refer to electrical
trouble shooting data in Section 4.)
2. Oil Spray but No Ignition
(a) Turn burner switch to OFF.
(b) Remove burner cover and check for contact of ignition coil wire to electrode contact strip.
(c) Remove electrode assembly. Clean electrode points and insulator and determine if insulator is cracked
or broken. Check setting of electrode points to specifications in Figure 35.
(d) Check wiring from switch to pulsator and from pulsator to coil. (Refer to Electrical Section 4.)
(e) Re-install electrode assembly in burner. Install cover. Turn burner switch to ON. If there is still no
ignition, check pulsator. (Refer to Burner Electrical System Troubleshooting Instructions in Section 4.)
3. Ignition but No Spray from Burner Nozzle
(a) Be sure hand valve in burner fuel line is open.
(b) Check fuel oil tank for level. Be sure sediment filter element is not plugged.
(c) Turn burner switch ON and make sure fan is running. Turn solenoid selector switch to SPRAY DOWN
and squeeze spray nozzle lever to see if normal spraying occurs. (Be sure hand valve in hose line is
(d) If normal spraying occurs turn switch to BURNER and check at burner solenoid wire terminals for 12
VDC with voltmeter. If no voltage, the toggle switch or wiring is faulty.
(e) If 12 VDC is present, turn switch to OFF. Disconnect burner fuel line at shut-off valve. Hold a container
in such a way that a spurt of oil can be safely caught. With pump running, jog switch to BURNER
position. If no oil spurts into container, solenoid valve is inoperative.
(f) If oil spurts from valve, re-connect fuel line. Clean burner nozzle and the strainer ahead of it.
Note: Pump must develop 100 PSI pressure in feed line for proper operation.
Replace pump if gauge installed in feed line does not show 100 PSI.