5.1. Maintenance

Possible malfunctions of steering and ways of their elimination



In due time tighten bolts of fastening of a case of the steering mechanism to a frame longeron, check fastening of fingers of steering drafts, a bipod and the lever of a rotary fist. Check a free wheeling of a steering wheel, adjust the steering mechanism, grease hinges of steering drafts and add oil in a case of the steering mechanism (the steering mechanism without hydraulic booster) or in an oil tank (the steering mechanism with the hydraulic booster) as directed tab. 1.

Fig. 252. Hinge of steering drafts: 1 – cap;
2 – spring; 3 – heel; 4 – the washer is spherical lower; 5 – the washer is spherical top; 6 – protective ring; 7 – spring cap; 8 – forelock; 9, 13 – a nut; 10 – spherical finger; 11 – cracker;
12 – tip; 14 – draft


At emergence of a gap in hinges of steering drafts wrap against the stop a cap of 1 (fig. 252), then turn off it on 1/2 turns and in this situation to a zakernita.
Periodically check an inhaling of nuts of 13 tips of steering drafts.
Do not allow emergence of gaps in conic connections of levers and fingers 10. For their elimination to a rasshplintuyta a nut 9, tighten it to the full and again to a zashplintuyta. The untimely inhaling of the specified connections causes wear of conic openings in levers that will demand replacement of details.
Pay attention to a condition of fastening of bearings in forks of hinges of the driveshaft of steering.
At emergence of a radial gap in the hinge (axial movement of a crosspiece in bearings) in addition you raskernit bearings in forks so that not to allow smyaty a bearing glass. In bearings of a crosspiece Litol-24 lubricant at assembly at the plant is put and in operation it is not required to add it.
Service of system of the hydraulic booster of the steering mechanism consists in check of a tension of a belt of the drive of the pump, tightness of hoses and their connections, lack of leaks of sealants of the pump and steering mechanism and level of oil in an oil tank.

Check and adjustment of a tension of a belt of the drive of the pump of the hydraulic booster
At a normal tension of a belt its deflection in the middle between pulleys of a bent shaft and the pump when pressing a belt with a force of 39 N (4 kgfs) has to make:
– 12–17 mm for UAZ-3160,-31601,-31605;
– 8–14 mm for UAZ-31604.
If necessary regulate a belt tension movement of the pump on an arm of its fastening to the engine. For this purpose weaken bolts of fastening of the pump to an arm, move the pump with the tension screw to a normal tension of a belt and tighten bolts of fastening of the pump. Replace a belt in case of its damage or excessive stretching.

Check of level and replacement of oil in system of the hydraulic booster
Add oil to the level of a grid of the bulk filter of an oil tank or no more than 5 mm are higher. Oil has to be previously filtered via the filter with a filtration subtlety no more than 40 microns.
The applied oil – the P TU 381011282-89 brands, volume of the filled-in oil – 1,1 l.
Replace oil according to tab. 1, and also at repair or adjustment of the steering mechanism.
Fill system of the hydraulic booster in the following order:
1. Uncover an oil tank, fill in oil before its emergence over the filtering grid (no more than on 5 mm).
2. Without launching the engine, turn a steering wheel or an entrance shaft of the mechanism from one extreme situation in another before the termination of an exit of vials of air from oil in a tank. Add oil in a tank. When pumping it is necessary to disconnect draft of a bipod from a bipod or to hang out forward wheels.
3. Launch the engine, at the same time adding oil in a tank. To prevent hit of air to the soaking-up highway, supply of oil during gas station has to be not less than 5 l/min.

Note
In case of plentiful foaming of oil in a tank which demonstrates hit of air in system stop the engine and let's oil be defended within not less than 20 min. (to an exit of vials of air from oil).
Examine places of accession of hoses to units of system of the hydraulic booster and if necessary eliminate leakage.

4. Let's the engine work 15–20 with and pump over system of the hydraulic booster for removal of residual air from the steering mechanism turn of a steering wheel from one extreme situation in another, without detaining in extreme provisions, on three times in each party.
5. If necessary add oil in a tank.
6. Close a tank a cover and tighten a cover nut by effort of a hand.
Through each 100 000 km of a run or two years of operation replace the filter in an oil tank.

Check of a free wheeling of a steering wheel
The condition of the steering mechanism is considered normal and not demanding adjustment if the free wheeling of a steering wheel in provision of the rectilinear movement does not exceed 10 °.
In the presence of the hydraulic booster check a free wheeling of a steering wheel during the operation of the engine in the idling mode, shaking a steering wheel in that and other party prior to turn of forward wheels.
On the car without hydraulic booster (the steering mechanism with transfer a worm roller) check a free wheeling from applying of effort of 7,5 N (0,75 kgfs) on a rim of a steering wheel in that and other party.
The free wheeling 10 ° corresponds
40 mm at measurement on a rim of a steering wheel.
If a free wheeling more specified, check at first fastening of the steering mechanism, a condition of hinges of steering drafts and hinges of a steering column, an inhaling of bolts of fastening of forks of hinges, nuts of fastening of a bipod and the lever and fastening of a steering wheel, be convinced of lack of a gap in shlitsevy connection of the driveshaft. Start adjustments after elimination of malfunctions.

Adjustment of the steering mechanism with transfer a worm roller
Adjustment of the steering mechanism needs to be carried out for elimination of gaps in bearings of a worm and between a worm and a roller.
Begin adjustment with check of an axial gap in bearings of a worm. In the presence of a gap in bearings of a worm when rocking a steering wheel the worm moves in the axial direction. Movement of a worm can be noted if to clasp a case mouth with a palm, and to touch by a thumb an end face of a shaft of a worm or the remote plastic plug installed on a shaft of a worm. If axial movement of a worm is absent, regulate only gearing of a roller with a worm.

Fig. 253. Steering worm roller mechanism: 1 – case; 2, 27 – plugs; 3 – cuff; 4 – bipod; 5 – washer; 6 – nuts; 7 – epiploons; 8,14 – bearings; 9 – stopper; 10 – shaft of the steering mechanism; 11 – worm; 12 – lower cover; 13 – adjusting laying; 15 – roller axis; 16 – bipod shaft roller;
17 – bipod shaft; 18 – bolts of fastening of a case; 19 – hinge; 20 – adjusting screw; 21 – the cap-type nut; 22 – lock washer; 23 – pin; 24 – bearing; 25 – side cover of a case; 26 – laying


You carry out adjustment of bearings of a worm by means of laying of 13 (fig. 253) established between a case 1 and the lower cover of the 12th case of the steering mechanism in the following order:
1. Remove the steering mechanism from the car.
2. Merge oil from a case.
3. Fix the steering mechanism in a vice.
4. Turn off the cap-type nut 21 and remove a lock washer 22 from the adjusting screw 20.
5. Turn off bolts of fastening of a side cover 25.
6. Easily striking with a copper or aluminum drift an end face of a shaft of the 17th bipod, take out a bipod shaft together with a roller 16 and a cover and carefully remove laying 26.
7. Turn off bolts of fastening of the lower cover 12 and uncover.
8. Carefully separate and remove thin paper laying 13.
9. Establish the lower cover into place, tighten bolts and check axial movement of a worm.
10. If axial movement is not eliminated, again remove the lower cover, remove thick laying, and on its place establish earlier removed thin. Do not remove more than one laying at once.
11. Rotation of a worm 11 finally check an inhaling of bearings 8 and 14. At the correct inhaling of roller bearings the moment of rotation of a worm has to be 0,5–1,0 N · m (0,05–0,10 kgfs · l) (without the established bipod shaft) that corresponds to the effort of 2,2-4,5 N (0,22–0,45 kgfs) made on the radius of 212,5 mm (on a rim of a steering wheel).
You carry out adjustment of gearing of a roller with a worm (it is possible without removing from the car) in the following order:
1. Establish a steering wheel in the situation corresponding to the rectilinear movement of the car.
2. Disconnect steering draft from a bipod.
3. Turn off the cap-type nut 21 and remove a lock washer 22 from the adjusting screw 20.
4. Turning the adjusting screw 20 clockwise, eliminate a gap in gearing.
5. Put on a lock washer. If the opening in a washer does not coincide with a pin, combine them, turning the adjusting screw.
6. Screw a nut 21 on the adjusting screw and, shaking a hand a steering bipod, check lack of a gap in gearing.
7. Check the effort necessary for a provorachivaniye of a steering wheel. The steering wheel has to be turned from the average situation corresponding to the rectilinear movement at effort of 9-16 N (0,9–1,6 kgfs),
on a steering wheel that corresponds to the moment of rotation of 1,9-3,4 N · m (0,19 - 0,34 kgfs · м).

Adjustment of the steering mechanism with the hydraulic booster
For performance of adjustment of the steering mechanism it needs to be removed from the car.
Carry out adjustment of the steering mechanism in the following sequence:
1. Fix the steering mechanism in a vice so that delivery and drain openings were below. Turning manually an entrance shaft (rotor) of the steering mechanism, merge oil from the mechanism.
2. Slightly pressing a hand an entrance shaft along its axis, shake a bipod. If at the same time axial movement of an entrance shaft is felt, execute adjustment of a tightness of bearings of the screw:

Fig. 254. The steering mechanism with the hydraulic booster: 1 – nut; 2, 19, 21, 22, 35, 39 – sealing rings; 3 – glass; 4, 10 – persistent bearings; 5, 6 – a sealant; 7 – lath piston; 8 – screw;
9 – case; 11 – union of a delivery hose; 12 – union of a drain hose; 13 – sleeve; 14 – cuff; 15 – torsion; 16, 38 – pins; 17 – шариковод; 18 – balls; 20 – the channel in a case; 23 – bipod;
24 – bipod nut; 25 – the cover is protective lower; 26 – lock rings; 27 – adjusting washers; 28 – bipod shaft support; 29 – roller; 30 – bipod shaft; 31 – the cover is protective top; 32 – rotor; 33 – protective cap; 34 – distributor case; 36 – the channel in the distributor case; 37 – a bolt of fastening of the case of the distributor to a case


– with the help a small beard and the hammer carefully, without applying excessively strong blows, correct a fillet of a glass of 3 (fig. 254);
– turning a glass 3 clockwise, eliminate a gap;
– check the moment of a provorachivaniye of an entrance shaft which has to be no more than 3 N · m (0,3 kgfs · м). Measure the moment throughout no more than one turn of an entrance shaft from any extreme situation;
– you zakernit edge of a glass in case wall grooves.
3. If axial movement of a rotor is not felt or is eliminated, and on average the provision of a shaft of a bipod when rocking for a bipod the gap is felt, execute adjustment of gear gearing:
– turn off a nut 24 and remove a bipod 23;
– remove top 31 and lower the 25th protective covers;
– remove lock rings 26 and adjusting washers 27;
– straighten adjusting washers;
– turning at the same time bipod shaft support 28 counterclockwise (if to take a detached view the shlitsevy end of a shaft of a bipod), eliminate a gap in gearing. You carry out adjustment in the provision of a shaft of a bipod corresponding to average position of the gear sector;
– check the bipod shaft provorachivaniye moment which has to be within 35–45 N · m (3,5–4,5 kgfs · l) upon transition of a shaft of a bipod through average situation.
If after adjustment of a tightness of bearings and a gap in gear gearing the gap does not manage to be eliminated, the gap means the ball screw is caused by wear of transfer. In this case the steering mechanism is subject to repair;
– establish adjusting washers, bend one of moustaches in both adjusting washers in a bipod shaft support groove (at discrepancy of one of short moustaches with a groove of a support of a shaft of a bipod remove an adjusting washer, turn it on 180 ° and establish into place) and establish lock rings.
4. Install the steering mechanism on the car, then establish a bipod and wrap by hand a bipod nut.
5. Attach a driveshaft fork, delivery and drain hoses, without allowing their twisting and sharp excesses, fill in oil in a hydraulic system (see above).
6. Attach draft of a bipod, tighten also to a zashplintuyta a nut of a spherical finger, tighten a bipod nut.