18
Yoder YS 640
3. Remove the burn grate from the firebox. Inspect and clean thoroughly. Make cer-
tain that the combustion holes in the burn grate and the igniter tube in the firebox are
free of debris or ash build up. Visually inspect the air way between the combustion fan
and the firebox to be certain that it is free and clear of ash and debris. (A shop vacuum
works well for ash and debris removal.)
4. Inspect for and remove any grease build up on the bottom of the cooking chamber.
5. Inspect the silicone seal around the firebox, paying particular attention to the seal
above the firebox at the hopper wall. It will be necessary from time to time to reapply
high heat silicone such as Permatex 81878 in this area which ensures proper combus-
tion and grill performance.
6. Reinstall the burn grate. Begin by resting the right hand side of the burn grate on
the firebox and then pressing down on the left hand side of the burn grate until fully
seated. When the burn grate is properly seated it rests firmly on the right hand side of
the firebox and fits close to the hopper wall. Finally, check that the igniter assembly is
centered in the respective hole in the burn grate.
BURN GRATE
FIREBOX
BURN GRATE
FIREBOX
MOUNT
IGNITER
END IN
OPENING
RIGHT SIDE
FIG 11
FIG 12
