Hobart G2SDM77, Installation, Use And Maintenance Instructions

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6. REPLACING IMPORTANT COMPONENTS
The unit should be checked at least twice a year. You must check the burners, the ignition, the interignition, the maximum
and minimum settings. Moreover, you should check the good functioning of the windscreen/draft hood (Type BII) and
the air inlet.
To be performed exclusively by an “Authorised Service Centre”!
In order to replace these components, it is important to first do the following:
- Shut off the gas supply inlet valve;
- Remove the knobs;
- Disassemble the front panel;
- Possibly remove the grills, the flame-spreaders and the burners.
Now you can replace the more important components.
A) Worktop burner thermocouple (Fig. 3)
- unscrew the nut (7) with a size-8 spanner
- unscrew the nut (Fig. 2 position 3) with a size-9 spanner
- install a new thermocouple of the same type, following the opposite assembling order.
B) Worktop burner cock (Fig. 2)
- unscrew the nut (3) with a size-9 spanner;
- disassemble all the gas connections (4-5-6);
- install the new cock following the reverse order of assembling;
- Pay attention to the bypass! Replace or invert the bypass idle screw.
N.B. : Check for gas leaks with bubble soap: sealing must be perfect.
C) Oven thermostat (Fig. 5) “For gas oven units only”.
The thermostat is located on the supply backguard.
- disassemble the thermocouple (16) with a size-19 spanner;
- first remove the gas outlet towards the burners (13 and 15);
- remove the bulb inside the oven, which is fixed by bulb-holder brackets;
- remove the gas inlet (12) with a size-9 spanner;
- install a new thermostat following the reverse assembling order;
- change the idle bypass screw (11);
- install the bulb into the oven using its brackets.
N.B. : Check for gas leaks using bubble soap: sealing must be perfect.
D) Oven thermocouple (Fig. 4 position 6 and Fig. 5 position 16)
- remove the oven bottom;
- unscrew the thermostat nut with a size-9 spanner (Fig. 5 position 16);
- unscrew the nut (Fig. 4 position 6) with a size-10 spanner;
- install a new Targhet thermocouple, following the opposite assembling order.
N.B. : Unified SIT thermocouple: should be kept 4 or 5mm back in respect of its holder.
E) Oven pilot burner spark-plug (Fig. 4 position 5)
- remove the oven bottom;
- detach the high-voltage wire;
- remove the spark plug by unscrewing the nut with a size-10 spanner;
- install the new spark plug, following the opposite assembling order.
F) Oven and/or Plate piezoelectric igniter
It is very easy to disassemble the igniter from the oven dashguard:
- detach the high-voltage wire;
- unscrew the nut with a size-25 spanner;
- install the new piezoelectric igniter, following the opposite assembling order.