Adjusting the gap between the end face of the drive gear and the stop
1. Disconnect the field winding wire from the output «M» traction relay.
2. Connect a 12-volt battery to the terminals «S» And «M».
3. The drive gear should move to the engaged position.
4. Using a feeler gauge, check the clearance between the end face of the drive gear and the stop (standard value - 0.5-2.0 mm).
5. If the axial play of the armature shaft does not fit within the specified limits, adjust it by installing or removing shims between the traction relay and the cover on the drive side.
Checking the retracting winding of the traction relay
1. Disconnect the field winding wire from the output «M» traction relay.
2. Connect a 12-volt battery to the terminals «S» And «M».
3. If at the same time the drive gear is shifted to the engagement position, the retracting winding of the relay is OK. If this does not happen, replace the traction relay.
Checking the holding winding of the traction relay
1. Disconnect the field winding wire from the output «M» traction relay.
2. Connect a 12-volt battery to the terminal «S» And «mass».
3. If the drive gear extends to the engaged position, the relay is good. If the gear repeatedly extends and returns to its original position, this indicates a break in the holding winding. Replace traction relay.
Idling mode check
1. Clamp the starter in a soft grip vise and connect a fully charged 12V battery to the starter as follows:
2. Connect control ammeter (with a scale of 100 A) and carbon rheostat, as shown in the figure.
3. Connect a voltmeter (scaled to 15 V) parallel to the starter.
4. Set the carbon rheostat to the off position.
5. Connect the wire from the negative battery terminal to the starter housing.
6. Using a rheostat, set the voltage to 11 V using a voltmeter.
7. Turn on the starter and check that the maximum current consumption is correct, as well as the smoothness and ease of rotation of the starter armature. (Regulatory values: current consumption: no more than 90 A; armature speed:, not less than 3000 rpm)
Checking the release of the traction relay
1. Disconnect the field winding wire from the output «M» traction relay.
2. Connect a 12-volt battery to the terminal «M» And «mass» («-»).
3. Extend and retract the drive gear. If the gear quickly returns to its original position, the traction relay is working properly. Otherwise, replace the traction relay.