3.5.2.3. Repair

For carrying out repair remove the forward leading bridge from the car and sort.
After dismantling and washing of details check their state and reveal their suitability for further work.
And differential you carry out repair of a case, the main transfer according to the instructions stated in the section "Zadny Bridge". At a half shaft casing bend you carry out its editing in a cold state. Replace worn-out details of rotary fists new, using these tab. 16.
Remove Peredny Bridge in the following order:
1. Establish blocks under back wheels of the car.
2. Disconnect on the left and right longerons pipelines of hydraulic brake system from the flexible hoses going to brake mechanisms of forward wheels. Turn off nuts of fastening of flexible hoses and remove them.
3. Turn off nuts of fastening of the lower ends of shock-absorbers.
4. Turn off bolts of fastening of a pe-redny cardan shaft to a flange of the leading gear wheel.
5. Rasshplintuyte also turn off a nut of a spherical finger of a bipod, having disconnected draft from a bipod.

Fig. 236. Forward suspension bracket: 1 – laying is vibration-absorbing; 2, 17 – spring arms;
3 – shock-absorber; 4, 21 – hinges rubber-metal; 5, 10 – nuts; 6 – step-ladder; 7, 8 – plugs rubber; 9, 16 – arms of the longitudinal lever; 11 – washer; 12 – hinges rubber; 13 – stabilizer arm; 14 – stabilizer; 15 – longitudinal bar; 18 – spring; 19 – buffer; 20, 23 – arms of cross draft; 22 – cross draft


6. Disconnect the stabilizer 14 (see fig. 236) cross stability from longitudinal bars of the 15th suspension bracket, cross draft 22 from an arm 23 on a frame, the back ends of longitudinal bars 15 from arms 9 on a frame.

Dismantling of the forward bridge
You carry out dismantling of the forward bridge in the following order:
1. Install the bridge on the stand.
2. Rasshplintuyte also turn off a nut of fastening of a finger of thirst of a bipod for the lever of a rotary fist and remove draft of a bipod.
3. Turn off bolts of fastening of the brake mechanism to the case of a rotary fist and remove it, unscrew screws and remove brake disks.
4. Remove couplings of shutdown of wheels.
5. Straighten the unbent edges of a key washer, turn off a nut and a counter-nut, remove a lock washer and an internal ring with rollers of the external hug bearing of the right and left wheels.
6. Remove naves of wheels.
7. Turn off bolts of fastening and remove guards of brake disks, pins of rotary fists and take out hinges of rotary fists.
8. Rasshplintuyte also turn off nuts of fastening of fingers and remove draft of a steering trapeze.
9. Turn off bolts of fastening sharo-howl support to a half shaft casing. Remove an emphasis-ogranichiteli of turn of wheels and vypressuyte spherical support from casings of half shafts.
10. Turn off nuts of fastening of the rotary lever on the case of a rotary fist. Remove the lever and a set of adjusting laying.
11. Turn off fastening bolts top - it slips shkvornya other rotary fist and remove a slip with a set of adjusting laying.
12. Turn off bolts of fastening of the lower slips shkvorney and remove slips with a set of adjusting laying.
13. Turn off bolts of fastening of an epiploon of a spherical support and remove an epiploon of a spherical support.

Fig. 231. Stripper shkvorney


14. Vypressuyte shkvorni with the help of adaptation shown in fig. 231 also remove the case of a rotary fist.
You carry out dismantling of a rotary fist without removal of the forward bridge from the car in the following order:
1. Substitute blocks under back wheels of the car.
2. Lift a jack a forward wheel from the party demanding dismantling.
3. Execute operations of subitem 2-9.
4. Turn off nuts of fastening of the rotary lever or bolts of fastening of the top slip shkvornya on the case and remove the lever or a slip with a set of adjusting laying.
5. Turn off bolts of fastening of the lower slip shkvornya and remove a slip with a set of adjusting laying.
6. Turn off bolts of fastening of an epiploon of a spherical support.
7. Vypressuyte shkvorni adaptation also remove the case of a rotary fist.

Dismantling and assembly of hinges of equal angular speeds
You carry out dismantling of hinges in the following order:
1. Note paint a mutual arrangement of fists of hinges.
2. Part fists, for this purpose knock with a fork of a short fist on a wooden support.
3. Clamp in a vice the hinge for a long fist a short fist up.

Fig. 232. Dismantling of the hinge


4. Turn a short fist in hundred-ronu one of the leading (peripheral) balls. If thus the opposite ball does not leave flutes, press or hit with the copper hammer (fig. 232) on a short fist. Thus observe care as one of balls can take off from the hinge with a big speed.
5. Take out other balls of a sharni-r. After selection of new balls of the increased size (repair) or replacements of one of fists collect the hinge.
You carry out assembly of hinges in the following order:
1. Clamp in a vice a long fist in vertical situation.
2. Insert the central ball.
3. Establish a short fist on the central ball so that the tags noted by paint coincided and, turning it from the party in the party, establish serially three leading (peripheral) balls.
4. Part fists on 10–12 mm and turn a short fist on the maximum corner in the party from free flutes, establish the fourth ball in flutes.
5. Turn a short fist in vertical situation.
Balls of the hinge have to have such that the moment necessary for turn of a fist on 10-15 ° in all parties from a vertical at other fist clamped in a vice, equaled 30–60 N · m (3–6 kgfs · м). tightness
The difference of the moments of turn of a fist in two co-perpendicular directions of one hinge should not exceed 10 N · m (1,0 kgfs · м). For receiving the required tightness and ensuring the correct assembly balls need to be sorted on 9 groups.
The sizes of diameters of the leading sha-rik of the hinge of equal angular speeds in mm:
     I                  25,32-25,34 VI         25,42–25,44
     II                  25,34-25,36 VII        25,44–25,46
     III                 25,36-25,38 VIII       25,46–25,48
     IV                25,38-25,40 IX         25,48–25,50
     V        25,40–25,42
Diameter of the central ball is 26,988–0,05 mm.
Each hinge has to gather with balls of one group or two next groups.
For example: two balls with a diameter of 25,41 mm and two balls with a diameter of 25,43 mm. At assembly balls of one size surely arrange diametrically opposite to one another. The difference of diameters of two couples balls of one hinge is allowed no more than 0,04 mm.
After assembly roll the hinge at the stand within 2 min. with a frequency of rotation of 4,8 with-1 (300 min.-1) with change of a corner from 0 to 30 °.
At a running in balls and flutes grease as directed tab. 1.

Assembly of the forward bridge
You carry out assembly of the forward bridge in an order, the return to dismantling, taking into account the following:
1. Press the plug in a pin of a rotary fist aflush with a nest end face under a persistent washer.
After a press fitting deploy the plug and iron a brooch to diameter 32 +0,34+0,17 mm.
2. Limit longitudinal movements of the hinge of equal angular speeds by persistent washers, one of which establish in a spherical support, and another – in a pin.

Fig. 233. Installation of a persistent washer: 1 – persistent washer; 2 – pin; 3 – spherical support; 4 – plug


Oil flutes of persistent washers have to be turned to the hinge. For fixing of a washer in a nest raskernite it in 3 or 4 points which are evenly located on a circle. The size from the plane of a persistent washer of 1 (fig. 233) to a flange of a pin 2 has to be 7 +0,08–0,26 mm, from the plane of a washer 1 to the center of a spherical support 3 – 48,2 +0,38 mm.
3. When replacing in a spherical support of plugs 4 shkvorney deploy them after a press fitting to diameter of 25 +0,030 +0,008 mm. The caliber of diameter of 24,995 mm has to enter at the same time both plugs.
4. At installation of the hinge enclose in a spherical support lubricant according to tab. 1.
5. Shkvorni and plugs shkvorney before assembly grease with liquid lubricant.

Fig. 234. Selection of adjusting laying:
1 – spherical support; 2 – basic washer; 3 – shkvo-ren; 4 – adjusting laying; 5 – case of a rotary fist


shkvorney you will choose the number of laying for receiving certain axial tightnesses in plugs depending on the size B (fig. 234) determined by the sum of the sizes of a rotary fist and adjusting laying, and the size A determined by the sum of the sizes of a spherical support, basic washers and shkvorney. The number of laying has to be not less than five.
Carry out measurement under loading
1,6 kN (160 kgfs). The size A has to be 0,02-0,10 mm more than the size B.
Establish adjusting laying from above and from below on end faces of the case of a rotary fist. At even number of laying, identical on thickness, their number from above and from below has to be identical.
At even number of laying, but their different thickness or at odd number of laying the difference between the total thickness of the top and lower laying should not exceed 0,1 mm.
6. At assembly and installation of an epiploon of a spherical support impregnate its internal felt ring in warm motor oil.
7. After assembly check the forward bridge at the stand under loading and without it. Loading is created by simultaneous snubbing of both half shafts.
Correctly collected forward bridge should have no increased noise and heating, and also an oil leak through cuffs and epiploons, covers and bolt connections.