Vulcan-Hart Comprehensive Guide to Blower and Motor Service for Vulcan SG4D Convection Oven

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BLOWER AND MOTOR

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

1.Remove racks.

2.Remove the screws securing the snorkel and remove the snorkel.

3.Remove screws securing baffle panel and remove the panel.

4.If replacing:

A.Blower Only - Loosen set screws on blower hub and using a bearing puller, remove blower from motor shaft.

1)Reverse procedure to install and adjust blower position as outlined under the Blower Adjustment in Service Procedures and Adjustments section.

B.Motor - Perform step 4A and continue procedure.

5.Remove the screws that secure the motor mounting plate to the rear wall.

6.Place a piece of cardboard on the bottom of the oven cavity to protect its surface from any damage during motor assembly removal.

7.Pull the motor assembly into the oven cavity and place it on the cardboard.

8.Remove the junction box cover from the motor, disconnect lead wires and remove the conduit.

9.Remove motor mounting bolts and flat washers, then lift the motor from the mounting plate.

10.Position the replacement motor on the motor mounting plate and install mounting bolts and washers. Hand tighten mounting bolts only.

11.Reconnect to lead wires at the motor, and replace conduit and junction box cover.

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Contents SG4 & SG6 Series Full Size GAS Convection Ovens VULCAN-HART Table of Contents Table of Contents General Removal and Replacement of Parts Component LocationBottom Front Cover Covers and PanelsTop Front Cover Right Side PanelControl Panel Components SG4D/SG6D SG4C/SG6CComponent Panel Components Temperature Probe SG4C/SG6C Temperature Probe ShownGAS Burners GAS Orifice GAS Solenoid ValveIgnition Control Module Spark Igniter and Flame SenseBlower and Motor Oven Doors and Bearings Door Window Roller Latch Assembly Independent DoorsDoor Catch Roller Assembly Independent Doors Door Switch Interior Lights Lamp AssemblyHigh Limit Thermostat Fan Installation Tips Cooling FANTest Steps Service Procedures and AdjustmentsSolid State Temperature Controller Test SG4D/SG6D Solid State Temperature Control Calibration SG4D/SG6D Calibration StepsTemperature Probe Test SG4D/SG6D Temp F OhmsProbe Test Operation Setup ModeComputer Controller SG4C/SG6C Computer Control Calibration SG4C/SG6C Solid State Relay TestGAS Pressure Adjustment Door Switch Adjustment Verification of Spark AT IgnitorBlower Adjustment Flame Current MeasurementDoor Adjustment Door Strike Adjustment Independent DoorsDoor Catch Roller Adjustment Electrical Operation Component DescriptionFront View Plug, Socket and Components SG4D/SG6DPlug, Socket and Components SG4C/SG6C Control Panel Component PanelFront View Cook Cycle SG4D/SG6D with Solid State Temperature ControllerSequence of Operations Timer Cycle Cool Down Cycle Solid State Temperature ControllerSG4C/SG6C with Computer Controller Normal Cook CyclePage Temperature and Time Cycle Normal Cooking Roast and Hold CycleWiring Diagrams 426574 Rev. C Schematics ThermostatGAS Convection Oven SG4 with Watlow 734 Control Troubleshooting Symptoms Possible CausesComputer Control Models only Symptom Possible Causes Symptoms Possible CausesError Codes Probable Cause Solution Problem