Table of contents: Removal the starter ↓ Replacing brushes ↓
When the ignition key is turned to the "Start" position, power is supplied to terminal 50 of the solenoid relay located on top of the starter.
At the same time, the engagement lever engages the starter gear along the spiral turns with the toothed ring of the engine flywheel.
Only after the gear is fully engaged does the retractor relay fully turn on the power coming from terminal 30 of the battery, and then the starter vigorously cranks the engine.
The starter motor and the gear are connected to each other via a gearbox. Therefore, the electric motor rotates much faster than the gear.
When the engine is started, the gear again disengages from the flywheel.
Removal the starter
Disconnect the ground wire from the battery, otherwise there is a high risk of a short circuit.
Remove the lower engine compartment protection (chapter "Body elements").
Raise the car from the front right and secure it.
Remove all wires from the starter relay.
Remove the starter mount from the front in the direction of travel (where it is).
Remove the mounting bolts or nuts on the starter mounting flange (that is, from behind in the direction of travel).
Remove the starter.
Replacing brushes
If the starter does not work, then perhaps the whole problem is in the wear of its brushes. Carbon brushes can only be purchased complete with a mounting plate. Since the starter housing must be sealed after opening, you will also need D3 sealant in the spare parts store. Next, for models with a 4-cylinder engine, you will need a powerful soldering iron and solder.
Remove the starter.
On the closed side of the starter, unscrew the two slotted head screws securing the small bearing cover and remove the cover.
Remove the lock washer and adjusting washer from the shaft located under the cover.
Remove both screws (or nuts with studs) from the back cover of the case and remove the cover.
Measure the length of the brushes - minimum length 8 mm.
To replace the brushes, disconnect the mounting plate from the retractor relay.
Reassemble the starter, sealing the housing cover, mounting screws and bearing cover.
Remove the starter.
Disconnect the wire from the starter.
Remove the three screws on the solenoid relay mounting flange.
Slightly press the retractor relay and remove the spring from the starter lever.
The starter on the right side of the engine is difficult to access (the illustration shows a 4-cylinder engine). The numbers mean:
1 — terminal wire 50 (from the ignition switch);
2 — terminal 30 wire (from battery);
3 - starter mount;
4 — starter.
The illustration shows the starter (5-cylinder engine) disassembled:
1 - brush holder;
2 - anchor;
3 — gearbox;
4 — bearing housing;
5 — body;
6 — bearing housing cover;
7 — bearing cap;
8 - lock washer, adjusting washer and sealing gasket.
The original material is located on the website AudiManual.ru