7.10. Electric motor of a cleaner wind stele

Possible malfunctions of the electric motor of screenwash and ways of their elimination

The electric motor of screenwash – with excitement from permanent magnets, three-brush, with two speeds of rotation.
For protection of the electric motor against overloads in a cleaner the thermobimetallic safety lock is established.
The faltering operating mode of a cleaner is provided to the electronic relays 524.3747 installed in the assembly block.
This relay also includes a cleaner motor-reducer (small speed) at inclusion of a washer of a windshield.
Dismantling, assembly and check of technical condition of a motor-reducer of a cleaner

Fig. 304. Details of a motor-reducer of screenwash: 1 – persistent screw;
2 – thrust bearing; 3 – reducer gear wheel; 4 – panel; 5 – thermobimetallic safety lock; 6 – cover; 7 – cracker; 8 – electric motor case;
9 – anchor; 10 – brush holder; 11 – reducer case

For dismantling of a motor-reducer unscrew screws of fastening of a cover of 6 (fig. 304) of a reducer and remove it together with the panel 4 of the trailer switch. Then unscrew screws of fastening of the case 11 of a reducer to the case 8 of the electric motor and separate them. Take out an anchor of the 9th electric motor.
To remove a gear wheel 3 reducers, turn off a nut of fastening of a crank, 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 rather elastic. Wipe a collector with the pure rag which is slightly greased with technical vaseline. If the collector strongly burned or is worn-out, then replace a motor-reducer new.
Check whether there are no jamming traces on anchor shaft necks.
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, avoid 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.