Webasto Thermo 350 Service Manual download pdf (Page 53)

Thermo 230 / 231 / 300 / 301 / 350 8 Servicing

803

8.5.2 Burner Head Opening and Closing

or Removal and Installation

WARNING

The igniter box operates with high voltage. Prior to

opening the burner head the connectors of the cable

harness in the vehicle have to be disconnected to prevent

lethal injuries.

After closing and fixing burner head, reconnect connec-

tors in the vehicle.

NOTE

Maintenance on the heater is easy. By swinging the

burner head open the following components become

accessible:

– fuel pump and fuel nozzle

– solenoid valve

– igniter box

– igniter electrodes

– flame sensor

– combustion chamber

– nozzle block preheater (if installed)

In order to obtain a convenient burner head opening angle

it is required to disconnect the electrical connection(s) to

the temperature limiter and temperature sensor.

Opening or removal

1. Disconnect electrical connections to temperature

limiter and temperature sensor.

2. Loosen nuts (3, Fig. 801) enough to release hinge

bolts (2).

3. Swing hinge bolts (2) out.

4. Swing burner head (4) open.

5. Remove cotter pin (1) as required to remove burner

head.

Closing or installation

1. As required fasten burner head (4, Fig. 801) in

position using cotter pin (1).

2. Swing burner head (4) closed and locate for

assembly.

3. Swing hinge bolts (2) into lock position and secure

with nuts (3).

4. Torque nuts (3) with 7.5 Nm + 1 Nm.

5. Reconnect electrical connections to the temperature

limiter and temperature sensor.

NOTE

When making electrical connections observe wiring color

codes.

Fig. 801 Swinging Burner Head open

1 Cotter pin

2 Screw (2)

3 Nut (2)

4 Burner head

NOTE

Depending on the burner head direction of swing the

cotter pin may be located on the opposite side.

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Webasto Thermo 350 Service Manual Page 53

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