10.5.1. Features of a design

On the UAZ Hunter cars with UMZ-4218 engines install a starter 42.3708, on cars with ZMZ-409 and ZMZ-5143 engines – a starter 6012.3708. These starters are similar on a design and represent the electric motor of a direct current with electromagnetic excitement. In alternative executions with ZMZ-409 and ZMZ-5143 engines install starters of Iskra or Bosch on cars. These starters also represent electric motors of a direct current with electromagnetic excitement, with the built-in planetary reducers and couplings of a free wheeling of roller type.

Fig. 10.5. Starter 42.3708: 1 – cap; 2 – a cover from the drive; 3 – lever axis; 4 – rotor shaft; 5 – drive gear wheel; 6 – starter drive; 7 – rotor; 8 – intermediate support; 9 – drive lever; 10 – case; 11 – stator winding; 12 – pole; 13 – rivet; 14 – anchor of the traction relay; 15 – basic washer of a spring; 16 – relay anchor spring; 17 – case of the traction relay; 18 – the holding winding; 19 – the involving winding; 20 – spring; 21 – contact disk; 22 – cover of the traction relay; 23 – spring; 24 – contact bolt; 25 – conclusion; 26 – insulating plug; 27 – brush spring; 28 – a cover from a collector; 29 – sealing ring; 30 – coupling bolt; 31 – protection cover; 32 – brush; 33 – holder of a brush; 34 – persistent ring; 35 – lock ring; 36 – persistent washer; 37 – rotor winding; 38 – relay anchor plunger; 39 – insulating plug; 40, 41 – protective caps; 42 – collector; 43 – rotor shaft plug; 44 – buffer spring

From above on the case of a starter the traction relay with two windings is installed: involving and holding. At turn of a key in the ignition lock situation "II" joins a power-supply circuit of windings of the traction relay, the anchor of the relay is involved and via the lever enters into gearing a starter gear wheel with a gear wreath of a flywheel of the engine. At the end of the course the anchor includes a power-supply circuit of a starter and at the same time disconnects the involving relay winding (food moves only on the holding winding). At return of a key in the ignition lock in situation "I" the power-supply circuit of a starter and the holding winding is disconnected, the anchor under the influence of a spring brings a starter gear wheel out of gearing with a gear wreath of a flywheel. The device of a starter 42.3708 is shown in fig. 10.5, and a production Iskra AZE2154 starter — in fig. 10.6

Fig. 10.6. Production Iskra AZE2154 starter: 1 – a cover from the drive; 2 – starter drive; 3 – drive lever; 4 – reducing transfer; 5 – traction relay; 6 – stator; 7 – anchor; 8 – brush holder; 9 – back cover
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Technical characteristics of starters are given in tab. 10.4.

Table 10.4 Technical characteristics of starters