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8-1-3-proverka-i-regulirovka-uglov-ustanovki-perednikh-koles.html
8.1.3. Check and adjustment of corners of installation of forward wheelsCheck and adjustment of corners of installation of forward wheels is carried out at special stands according to the instruction on the stand.
The prevention  Check of corners of installation of wheels is obligatory, if replacement or repair of details of a suspension bracket which can cause change of corners of installation of wheels are made.
At the new car (before the first maintenance service) corners of installation of wheels have following values:
| - Longitudinal angle of slope of an axis of turn – 4 ° |
1 ° |
Mm; |
| –1 ° 30’ |
| - Disorder 0 ° 30’ |
40’ |
Mm; |
| – 30’ |
– A convergence – 1/7 mm.
After carrying out of the first maintenance service (through 2000-3000 km of run) and at the further operation of the car value of corners of installation of wheels should be:
– A longitudinal angle of slope of an axis of turn – 4°±30 ’ (3°30’±30 ’) *;
– Disorder – 0°30’±20 ’ (0°5’±20 ’) *;
– A convergence – 2/4 mm (3/5 mm) *.
The difference in longitudinal angles of slope of axes of turn of the right and left wheels should not exceed 0°30 ’.
Before adjustment of corners of installation of wheels check up:
– Pressure of air in tyres;
– An axial backlash in bearings of naves of forward wheels;
– Serviceability of the shock-absorber (absence of jamming of a rod);
– Radial and axial palpation of tyres;
– A backlash in the top spherical hinges of a suspension bracket;
– A steering wheel free wheeling.
The found out malfunctions eliminate and make necessary adjustments.
The control and adjustment of corners of installation of wheels can be spent both on the loaded car, and on not loaded, however the control of corners on the loaded car yields more exact results. Therefore, in responsible cases, it is recommended to carry out the control and installation of corners on the car under static loading 3136 Н (320 кгс) that corresponds approximately to weight of four persons and cargo in 40 kg in a luggage carrier.
The car is loaded or the special cargoes suspended to the bottom of a body, or a ballast (280 kg), placed on pillows of seats and in a luggage carrier (40 kg). Forward seats should be on the average position of their longitudinal course. Cargo in a luggage carrier takes places in regular intervals. Fuel shortage is compensated by the cargo which had on the right party of the area of a luggage carrier.
After car installation on the stand, directly ahead of the control of corners, a<прожмите> car suspension bracket, putting 2-3 times effort in 392-490 Н (40-50 кгс), directed from top to down, at first on a back bumper, and then on the forward. Thus car wheels should settle down in parallel longitudinal axis of the car.
Sequence of check and adjustment of corners of installation of wheels the following:
– A corner of a longitudinal inclination of an axis of turn;
– A disorder corner;
– A convergence.
* In brackets values of corners without loading, without brackets – with loading are given.
CORNER OF THE LONGITUDINAL INCLINATION OF THE AXIS
If at check the corner size does not correspond to the data resulted above, change quantity of adjusting washers 27 (fig. the Forward suspension bracket see), established between an axis of the bottom lever and a cross-beam.
For adjustment of a corner of a longitudinal inclination of an axis of turn - ослабьте nuts of fastening of an axis of the lever to a cross-beam also change quantity of adjusting washers under bolts for reception of a correct corner of a longitudinal inclination of an axis of turn, being guided by the resulted table.
Change of a corner of disorder and longitudinal inclination of an axis of turn at change of quantity of washers in packages
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Quantity of the washers added in a package or withdrawn from it
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Wheel disorder
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Longitudinal angle of slope of an axis of turn of a wheel
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Forward bolt
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Back bolt
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Thickness of washers, mm
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0,5
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0,8
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0,5
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0,8
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1
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1
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- (7 '-9 ’)
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- (11 ’–14 ’)
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0
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0
|
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-1
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-1
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(7 '-9 ’)
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(11 ’–14 ’)
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0
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0
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1
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0
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0
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0
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- (18 ’–20 ’)
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- (29 ’–32 ’)
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-1
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0
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0
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0
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(18 ’–20 ’)
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(29 ’–32 ’)
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0
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1
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- (7 '-9 ’)
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- (11 ’–14 ’)
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(18 ’–20 ’)
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(29 ’–32 ’)
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0
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-1
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(7 '-9 ’)
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(11 ’–14 ’)
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- (18 ’–20 ’)
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- (29 ’–32 ’)
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-1
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1
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- (7 '-9 ’)
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- (11 ’–14 ’)
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(36 ’–40 ’)
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(58 ’–64 ’)
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1
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-1
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(7 '-9 ’)
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(11 ’–14 ’)
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- (36 ’–40 ’)
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- (58 ’–64 ’)
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Tighten nuts динамометрическим a key and check up a longitudinal angle of slope of an axis of turn.
The prevention At adjustment of corners of installation of forward wheels application of P-shaped adjusting linings which should be established a cut downwards is supposed.
CORNER OF DISORDER OF FORWARD WHEELS
If the disorder corner differs from norm, adjust it, having changed quantity of adjusting washers 27 (fig. the Forward suspension bracket see), established between an axis of the lever and a cross-beam, being guided by the table.
For increase in a corner of disorder remove from both bolts identical quantity of washers, and for reduction – add.
CONVERGENCE OF FORWARD WHEELS
| PERFORMANCE ORDER |
| 1. If the convergence size differs from norm, ослабьте coupling хомутики lateral draughts and a key 67.7813.9504 turn both муфты on identical size in opposite directions; thus муфты навертываются or turn away and change length of lateral draughts. |
| 2. Having executed adjustment, establish coupling хомутики a cut horizontally (towards a back part of the car) with a deviation upwards or downwards no more than 60 ° and in such position tighten them. At the tightened nuts of an edge of cuts coupling хомутиков should not adjoin. |
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CHECK AND ADJUSTMENT OF BACKLASHES IN BEARINGS OF THE NAVE OF THE FORWARD WHEEL
The scheme of adjustment of bearings of a nave of a forward wheel
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And – a nut edge;
In – a label on a washer |
| PERFORMANCE ORDER |
| 1. For backlash check lift a forward part of the car, обоприте it on supports and remove forward wheels. |
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2. Under a bolt of fastening of a wheel establish the adaptation 02.7834.9505. Rest a leg of the indicator 1 against an end face of an axis of a repeated fist, at zero position of an arrow and, moving a nave 4 along an axis of a rotary fist, measure size of moving (backlash) on the indicator (2 – a bolt; 3 – an arm). |
3. If the backlash is more 0,15 mm, adjust it in a following order:
- Turn away an adjusting nut from a pin of a rotary fist;
- Establish new or were in the use, but on other car, a nut and tighten its moment 19,6 Н·м (0,7 кгс·м);
- On a washer make a label In (fig. the Scheme of adjustment of bearings of a nave of a forward wheel see), then release on 20-25 ° a nut so that an edge And is not has reached a label In a little;
- Stop a nut in this position, pressing лунки on a nut neck into grooves on the end of an axis of a rotary fist. |
| 4. After adjustment the backlash in the bearing should be within 0,02–0,08 mm. |
| 5. At backlash adjustment it is necessary to consider that a carving direction on the left pin of a rotary fist right, on the right pin – left. |
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GREASING REPLACEMENT IN BEARINGS OF NAVES OF FORWARD WHEELS
| PERFORMANCE ORDER |
| 1. Ослабьте bolts of fastening of wheels. |
| 2. Lift a forward part of the car and обоприте it on supports, turn away bolts and remove wheels. |
| 3. Having unbent petals of lock plates, turn out bolts of fastening of a support of a brake; remove a support and take him aside, without disconnecting a hose of a supply of a liquid that air and a dirt have not got to system of a hydrodrive of brakes; the support should not hang on pipelines. |
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4. A stripper 67.7801.9514 remove a cap of a nave of a forward wheel. |
| 5. Turn away an adjusting nut, remove a washer. |
| 6. Stripper А.40005/1/9В press a nave, in gathering with a brake disk, the external bearing and an epiploon; cautiously, not to damage an epiploon, remove a nave from a rotary fist. |
| 7. Wash out an internal cavity of a nave and bearings kerosene. |
| 8. Before installation separators of bearings fill with greasing ЛИТОЛ-24. Space between external rings of bearings, on an internal surface of a nave, in regular intervals fill with the same greasing, in number of 40 In a nave cap, before its installation, put 25 г greasings. |
| 9. Cautiously, not to damage an epiploon, establish a nave in gathering with a brake disk on a rotary fist, then an internal ring of the external bearing, a washer and turn new or were in the use, but on other car, a nut. |
| 10. Adjust a backlash in nave bearings as it is described above. |
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BALANCING OF WHEELS
Wheels at special stands according to the rules described in instructions, applied on stands balance. After balancing a maximum permissible disbalance of a wheel in gathering with the tyre - 24,5 Н·мм (2600 г·мм). This size of a disbalance corresponds to weight грузика about 15 a wheel Disbalance is eliminated balancing грузиками which are kept on a rim special пружинками. It is not recommended to exceed weight грузиков in each plane of balancing more than 80
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