8.8.4. Dismantling, assembly and check of technical condition of a motor-reducer of a cleaner


Fig. 8-37. Details of a motor-reducer of screenwash: 1 — a cover; 2 — the panel; 3 — a reducer gear wheel; 4 — a steel washer; 5 — a textolite washer; 6 — a plate of fastening of a cover; 7 — the case; 8 — an anchor; 9 — a crank; 10 — a lock ring; 11 — a protective cap; 12 — a spring washer; 13 — a sealing ring; 14 — an adjusting washer; 15 — a thrust bearing; 16 — an electric motor cover

For dismantling of a motor-reducer unscrew screws of fastening of a cover of 1 (fig. 8-37) of a reducer and remove it together with the panel 2. Then unscrew screws of fastening of a cover 16 to the case 7 of the electric motor and separate them. Take out an anchor of the 8th electric motor.
To remove a gear wheel 3 reducers, turn off a nut of fastening of a crank 9, remove a lock ring from an axis and take out from the case an axis with a gear wheel and washers.
After dismantling blow internal cavities of the electric motor compressed air for removal of deposits of coal dust and check a condition of brushes and a collector.
Brushes have to freely, without jammings to move in brush holders, and springs have to be whole and have sufficient elasticity. Smooth out a collector a fine-grained grinding skin, and then wipe with the pure rag which is slightly greased with technical vaseline. If the collector strongly burned or is worn-out, then it is better to replace a motor-reducer new.
Check whether there are no jamming traces on anchor shaft necks. If necessary smooth out them a fine-grained grinding skin.
At assembly you take away brushes from a collector not to break them and not to damage their edges, and insert an anchor into the case with extra care, avoiding blows of an anchor about poles not to break them.
After assembly, for centering of bearings, knock with the wooden hammer on the motor-reducer case, and then check it at the stand.