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 |
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1. Fix the generator in a vice and turn out four screws of fastening of a back cover of the generator. |
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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.
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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.
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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. |
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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. |
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8. Turn out five screws, and remove the rectifier and the brush holder. |
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9. Divide a back cover and the stator. |
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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.
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11. To replace brushes. Unsolder a wattled wire and remove a brush. |
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Check of a rotor
PERFORMANCE ORDER |
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1. Measure by an ohmmeter resistance between contact rings. If resistance differs from demanded, replace a rotor.
Resistance: 3,5–4,5 Ohms |
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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. |
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Check of the stator
PERFORMANCE ORDER |
1. An ohmmeter check conductivity between stator coil wires. |
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2. In the absence of conductivity, replace the stator. |
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3. An ohmmeter check conductivity between stator coils. |
4. With conductivity, replace the stator. |
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Check of the block of the rectifier
PERFORMANCE ORDER |
1. An ohmmeter check conductivity between conclusions of each diode. |
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Negative (black)
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Positive (red)
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Conductivity
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Е | Pn, P1, P2, P3 |
About
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In | Pn, P1, P2, P3 |
X
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T | Pn, P1, P2, P3 |
X
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Pn, P1, P2, P3 | E |
X
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B |
About
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Pn, P2, P3, | T |
About
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Pn | T |
X
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2. If necessary, replace the rectifier block. |
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Check and replacement of brushes
PERFORMANCE ORDER |
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1. If brushes are worn-out to maximum permissible length, replace them.
Nominal length: 21,5 mm Maximum permissible length: 8,0 mm |
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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 |
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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. |
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2. With any defects, replace the bearing. |
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Assembly
PERFORMANCE ORDER |
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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. |
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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.
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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 |
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6. Install the back bearing and fix by a lock spring. |
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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. |
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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 |
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9. Establish a back cover of the generator and fix by four screws.
Inhaling moment: 2,9–6,4 N • m |
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