9.1.12. Starter 29.3708

Technical characteristic
Rated power, kW....... 1,3
The consumed current at the maximum power, And, no more....... 260
The consumed current in the slowed-down state, And, no more....... 500
The consumed current idling, without relay, And, no more....... 60

Features of the device
On cars 2115 with the carburetor engine the starter of type 29.3708 can be established. It represents the electric motor of a direct current with the mixed excitement and with the electromagnetic dvukhobmotochny traction relay.

Fig. 9.36. Starter 29.3708: 1 – restrictive ring; 2 – drive gear wheel; 3 – roller of the obgonny coupling; 4 – obgonny coupling; 5 – drive lever; 6 – a cover from the drive; 7 – relay anchor; 8 – relay winding; 9 – contact plate; 10 – relay cover; 11 – contact bolts; 12 – collector; 13 – brush; 14 – a cover from a collector; 15 – casing; 16 – case; 17 – stator pole; 18 – anchor; 19 – flood ring

Four poles 17 with excitement windings, three of which seriyesny and one shuntovy, are fixed in the case 16 (fig. 9.36). The case together with covers 6 and 14 are pulled together with two bolts. The anchor has a face collector. The back end of a shaft of an anchor rotates in the ceramic-metal plug pressed in a cover 14, and the forward end — in the plug pressed in a coupling case.

Fig. 9.37. Scheme of connections of a starter 29.3708: 1 – starter; 2 – rechargeable battery; 3 – generator; 4 – assembly block; 5 – ignition switch; P1 – the involving winding of the traction relay; P2 – the holding winding of the traction relay

The scheme of connections of a starter 29.3708 is shown in fig. 9.37. At inclusion of a starter tension from the rechargeable battery moves on both windings of the traction relay of a starter (the involving P1 and the holding P2). After short circuit of contacts of the traction relay the involving winding is disconnected.
Malfunctions of a starter 29.3708 same, as at a starter 5712.3708 (it is described in section 7), excepting the malfunctions connected with a reducer. But still additional malfunction is possible: short circuit or break in stator windings in case an anchor of a starter does not rotate or rotates too slowly.

Check of a starter at the stand

Fig. 7.16. The scheme of connections for check of a starter at the stand: 1 – the voltmeter with a scale limit not less than 15 V; 2 – starter; 3 – a rheostat on 800 A; 4 – the ampermeter with the shunt on 1000 A; 5 – switch; 6 – rechargeable battery

Check of a starter 29.3708 is similar described in section 7 for a starter 5712.3708. Connections of a starter at the stand are carried out according to fig. 7.16. But numerical values of parameters of check others.
So, when checking operability of a starter it is recommended to check its work at the brake moments 2; 6 and 9 N · m (0,2; 0,6 and 0,9 kgfs · м).
In the mode of full braking force of the consumed current has to be no more than 500 And, tension has to be not less than 7 V and the brake moment has to be not less than 13,72 N · m (1,4 kgfs · м).
On the idling mode force of the consumed current has to be no more than 60 And, and the frequency of rotation of an anchor of 4200-5500 min.-1 at a tension on plugs of a starter of 11,5-12 Century.

Fig. 9.36. Starter 29.3708: 1 – restrictive ring; 2 – drive gear wheel; 3 – roller of the obgonny coupling; 4 – obgonny coupling; 5 – drive lever; 6 – a cover from the drive; 7 – relay anchor; 8 – relay winding; 9 – contact plate; 10 – relay cover; 11 – contact bolts; 12 – collector; 13 – brush; 14 – a cover from a collector; 15 – casing; 16 – case; 17 – stator pole; 18 – anchor; 19 – flood ring

For check of the traction relay establish between a restrictive ring 1 (see fig. 9.36) and a gear wheel laying 12,8 mm thick and turn on the relay. Tension of turning on of the relay at a gear wheel emphasis in laying has to be no more than 9 V at the ambient temperature of (20±5) °C. If tension is more, then it indicates malfunction of the relay or drive.

Repair of a starter
Dismantling

Fig. 9.38. Starter details: 1 – lock ring; 2 – restrictive ring; 3 – the drive with the obgonny coupling; 4 – lever axis; 5 – forward cover; 6 – drive lever; 7 – relay anchor; 8 – traction relay; 9 – back cover; 10 – lock washer; 11 – protection cover; 12 – coupling bolt; 13 – adjusting washer; 14 – brush spring; 15 – brush; 16 – case; 17 – anchor

Turn off a nut on lower contact to a bolt of the traction relay 8 (fig. 9.38) and disconnect from it a stator winding conclusion. Unscrew screws of fastening of the traction relay and remove it. Disconnect an anchor of 7 relays from the drive lever 6. Take out a rubber cap with a washer from a forward cover.
Unscrew screws and remove the protection cover 11. Remove a lock washer 10, turn out coupling bolts 12 and disconnect the case 16 with a back cover 9 from a forward cover 5 with an anchor 17.
Unscrew fastening screws to brush holders of conclusions of a winding of the stator and disconnect the case from a back cover. Remove springs 14 and brushes 15.
Remove lock 1 and restrictive 2 rings and disconnect an anchor from the drive 3.
Rasshplintuyte also take out an axis 4 levers from a forward cover. Disconnect the lever 6 from the drive and take out the drive 3 of a forward cover. The drive understands after removal from a nave of the coupling of a lock washer.
If the traction relay of folding execution, then for its dismantling unscrew screws of fastening of a cover and unsolder conclusions of windings from the plug "50" and from the tip fixed on lower contact to a bolt of the traction relay.
After dismantling blow details compressed air and wipe.
Check of technical condition of details
Check of technical condition of details of a starter 29.3708 is similar to the check of details of a starter 5712.3708 described in section 7.
In addition check a condition of surfaces of shliyets and pins of a shaft of an anchor. On them there should not be zadir, забоин and wear. If on a surface of a shaft traces of yellow color from the gear wheel plug appeared, remove them with a fine-grained grinding skin as they can become the reason of jamming of a gear wheel on a shaft.
Check reliability of fastening of brush holders on a back cover. Brush holders of positive brushes should not have short circuits with a weight. Brushes have to move freely in grooves of brush holders. Replace the brushes which are worn out on height to 12 mm new.
Check a dynamometer pressure of springs upon brushes which for new brushes has to make (10±1) N [(1±0,1) kgfs] and if necessary replace springs new.
Assembly
Before assembly oil engine screw vents of a shaft of an anchor and a nave of the obgonny coupling, a gear wheel and the plug of a back cover. Grease the Povodkovy ring of the drive with jellied Litol-24 lubricant.
Assembly of a starter is carried out as it should be, the return to dismantling. 13 (see fig. 9.38) provide with selection of an adjusting washer an axial free wheeling of an anchor no more than 0,5 mm. Put on the isolating plastic tube the coupling bolt passing about stator winding conclusions.
After assembly check a starter at the stand.