Unigas RG91 Manual page 36

PART IV: MAINTENANCE
Removing the combustion head
1 Remove the top cover C;
2 remove the photoresistor from its seat;
3 unscrew the revolving connectors (E in figure) on the fuel pipes (use 2 spanners to avoid loosening the connections attached to the
distributor block);
4 loosen VRT screw to free the threaded rod AR, then screw out the 2 screws V holding the washer R and the screw VRT again;
5 remove the whole assembly as shown in figure;
6 clean the combustion head by means of a vacuum cleaner; to scrape off the scale use a metallic brush.
Note: to replace the combustion head reverse the procedure described above.
Removing the oil gun
Once the combustion head is removed, as described before, remove the oil gun as foloows:
1 unscrew the connectors from the oil pipes (E in figure) using 2 spanners to avoid loosening the connections attached to the distri-
butor block);
2 loosen the screw VB
3 remove the gun with the light oil nozzle holder.
4 clean the oil gun by means of a vacuum cleaner; to scrape off the scale use a metallic brush
5 replace the oil gun, if necessary.
Note: To re-assemble, follow the procedure above in reversed order.
AR
VRT
R
VB
C
E
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