Transmission Overload Protection
A stoker transmission will also include an overload protection device that automatically breaks the electrical circuit to the motor in the event that an obstruction should become lodged in the conveying mechanism of the unit. To reset (after removal of the obstruction), push in reset button on the side of the transmission.
Removal of Obstruction
Read the manufacturer’s instructions for removing obstructions from the conveying mechanism of the transmission. If these are not available, then you will have to determine the best way to gain access to the obstruction and remove it. There is usually an obstruction cleanout panel located in the back of the hopper. Full access to the feed screw is obtained by removal of this panel. It may be necessary to reverse the rotation of the feed screw manually to relieve the obstruction. To do this, the transmission must be placed in neutral. This can be done by disengaging the transmission from the conveying mechanism.
Lubrication
The electric motor should be lubricated at the beginning of the heating season and twice during the season. Use a good grade of medium engine oil.
The transmission will require approximately one pint of a suit- able grade of engine oil. This should be checked once each season. The oil should be removed and replaced at the end of two heating seasons provided there has been no flooding. Should the transmission become submerged in water, it is recommended that it be serviced by a representative of the stoker manufacturer.
Summer Service
It is recommended that the stoker be prepared for the next heating season just after the spring heating has been completed. The stoker should be prepared in the following manner:
1. Remove the coal from the hopper.
2. Paint or grease the inside of the hopper.
3. Open the hopper lid for air circulation.
4. Remove any siftings from the retort base, and remove any ash or clinker formation from the burner.
5. Clean and oil the electric motor and adjust the belts.
6. Oil the stoker screw (or worm).
7. Replace oil in the transmission, if necessary.
8. Run a heavily oiled coal or sawdust through the stoker, leaving the feed screw and coal tube full, over the summer. This prevents corrosion and rusting.