18:20. Repair of the generator

Dismantling

Prevention

Establish on sponges of a vice soft protective slips, for an exception of damage of details of the generator.


PERFORMANCE ORDER
1. Fix the generator in a vice and turn out four screws of fastening of a back cover of the generator.
2. Palniky, 200 W heat a back cover and remove it from the generator.

Prevention

If the back cover is not heated, it is very difficult to remove it in connection with very dense landing.


3. The screw-driver with a flat edge remove a forward cover of the generator together with a rotor.

Prevention

Be careful not to lose a lock spring which is located at the back bearing.


4. Fix a rotor in a vice and turn off a nut, then remove a pulley, a rotor and a forward cover.
5. If necessary, using a stripper, remove the forward bearing from a generator shaft.
6. A stripper, remove the back bearing from a generator shaft.
7. Turn out a nut on the plug B and remove the isolating plugs.
8. Turn out five screws, and remove the rectifier and the brush holder.
9. Divide a back cover and the stator.
10. A soldering iron unsolder the rectifier and wires, then remove tension regulator.

Prevention

You see off Otpaivaniye during no more than 5 with, otherwise tension regulator can be damaged.


11. To replace brushes. Unsolder a wattled wire and remove a brush.

Check of a rotor

PERFORMANCE ORDER
1. Measure by an ohmmeter resistance between contact rings. If resistance differs from demanded, replace a rotor.

Resistance: 3,5–4,5 Ohms
2. An ohmmeter check conductivity between a contact ring and an anchor of a rotor. With conductivity, replace a rotor.
3. If the surface of a contact ring has a roughness or wear tracks, smooth out it an emery paper.

Check of the stator

PERFORMANCE ORDER
1. An ohmmeter check conductivity between stator coil wires.
2. In the absence of conductivity, replace the stator.
3. An ohmmeter check conductivity between stator coils.
4. With conductivity, replace the stator.

Check of the block of the rectifier

PERFORMANCE ORDER
1. An ohmmeter check conductivity between conclusions of each diode.
Negative (black)
Positive (red)
Conductivity
Е Pn, P1, P2, P3
About
In Pn, P1, P2, P3
X
T Pn, P1, P2, P3
X
Pn, P1, P2, P3 E
X
B
About
Pn, P2, P3, T
About
Pn T
X
2. If necessary, replace the rectifier block.

Check and replacement of brushes

PERFORMANCE ORDER
1. If brushes are worn-out to maximum permissible length, replace them.

Nominal length: 21,5 mm
Maximum permissible length: 8,0 mm
2. Measure effort of compression of a spring. Measure effort of a spring at a brush vystupaniye on 2 mm. If necessary, replace a spring.

Nominal force: 3,1–4,1 N
Maximum permissible effort: 1,6–2,4 N

Check of bearings

PERFORMANCE ORDER
1. Check the bearing for smoothness of rotation, lack of jammings and noise at rotation, and also a side play.
2. With any defects, replace the bearing.

Assembly

PERFORMANCE ORDER
1. Establish brushes and solder a wattled wire so that the line of extreme wear of a brush acted on 2–3 mm from the holder of brushes.
2. Solder tension regulator to the rectifier and windings of the stator.

Prevention

You carry out the soldering during no more than 5 with, otherwise tension regulator can be damaged.


3. Collect a back cover and the stator.
4. Screw screws of fastening of the rectifier and the brush holder.

Inhaling moment: 2,0–5,4 N • m
6. Install the back bearing and fix by a lock spring.
7. Install the forward bearing of the generator. For installation of the bearing it is desirable to use a manual press with a mandrel which diameter corresponds to diameter of an external ring of the bearing.
8. Fix a rotor in a vice, establish on it a forward cover and a pulley. Fix a pulley by a nut.

Inhaling moment: 59–98 N • m
9. Establish a back cover of the generator and fix by four screws.

Inhaling moment: 2,9–6,4 N • m