Attention: on some models, the output location "M", to which the stator winding wire is connected, may differ from that shown in the figures, so do not mix up the traction relay terminals when performing checks.
Adjusting the axial clearance of the drive gear
1. Disconnect the stator winding wire from the terminal "M" traction relay.
2. Connect the wires from the 12V battery terminals through the switch to the terminals "S" (+) And "M" (-) traction relay, as shown in the figure.
3. Set the switch to position "ON", while the starter drive gear will move forward until it stops.
Attention: check within 10 seconds. With a longer test time, the winding of the traction relay may be damaged.
4. Using a feeler gauge, measure the axial clearance between the pinion gear and the stop ring. It must be within the specified limits.
Nominal value - 0.5 -2.0 mm
5. If the axial clearance is outside the range of nominal values, then adjust it by setting (withdrawals) shims between the traction relay and the starter front cover.
Checking the retracting winding of the traction relay
1. Disconnect the stator winding wire from the terminal "M" traction relay.
2. Connect the wires from the 12V battery terminals to the terminals "S" (+) And "M" (-) traction relay.
Attention: check within 10 seconds. With a longer test time, the winding of the traction relay may be damaged.
3. If the drive gear extends, then the retracting winding of the traction relay is OK. If the drive gear does not extend, then replace the traction relay.
Checking the holding winding of the traction relay
1. Disconnect the stator winding wire from the terminal "M" traction relay.
2. Connect the wires from the battery terminals to the terminal "S" (+) and starter housing (-), as it shown on the picture.
Attention: this check must be carried out quickly, no more than 10 seconds, in order to prevent the winding from burning out.
3. Manually extend the drive gear until it stops (to the limit ring).
4. If the drive gear remains in the extended position, then the holding coil is good. If the gear retracts, then there is a break in the holding winding. In this case, replace the traction relay.
Checking the return of the armature of the traction relay
1. Disconnect the stator winding wire from the terminal "M" traction relay.
2. Connect the wires from the 12V battery terminals to the terminal "M" (+) and starter housing (-).
Attention: check within 10 seconds. With a longer test time, the winding of the traction relay may be damaged.
3. Extend the drive gear by hand and release. If the gear immediately returns to its original position, then the traction relay is working properly. If not, replace the traction relay.
Attention: be careful when performing this operation so that the drive gear does not pinch your fingers.
Starter test without load
1. Clamp the starter in a soft-grip vise. Connect the wires from a fully charged 12V battery to the starter leads as follows:
- A) Connect in series between terminal "M" starter motor and battery positive ammeter (with a scale of 100A) and a carbon sliding contact rheostat as shown in the figure.
- b) Connect a voltmeter with a scale of 15 V in parallel with the stator winding circuit.
- V) Set the rheostat slider to the position of maximum resistance.
- G) Connect the wire from the negative battery terminal to the starter housing.
- d) Using a rheostat, set the voltage of the voltmeter to 11 V.
2. Check that the maximum current consumption corresponds to the rated value, and also that the starter armature rotates freely, without jerking or jamming.
Current consumption - max. 90 A
Note:
- If the current consumption is high at low starter speeds, then the cause is a defect in the bearings, mechanical contact of the armature and stator, short circuit to the housing of the armature and / or stator windings.
- - If the current consumption is high and the starter does not rotate, then the cause is a short circuit on the housing of the windings of the traction relay or armature, or jamming of the bearings.
- - If there is no current and the starter does not rotate, then the cause is a defect in the armature and / or stator windings or a defect in the brushes and / or commutator.
- - If the current consumption is low at low starter speeds, then the cause is poor contact at the stator winding output points.
- - If the current consumption is high at high starter speeds, then the reason is the short circuit of the stator winding.
- - If the current drawn is low at high starter speeds, the starter is good.