Adjusting the steering column must be done after adjusting the driver's seat in relation to the control pedals. For this you need:
- - turn the handle 23 towards you and up, loosening the fixation of the steering column;
- - set the steering wheel to a comfortable position;
- - fix the selected position of the steering column by turning the handle 23 down and away from you.
The bearings should be adjusted when an axial or radial clearance appears in the bearings of screw 2 (Fig. 2) To make sure that these clearances are present, it is necessary:
- turn the steering wheel 2.5 turns from the position of rectilinear movement in any direction;
- - swing the steering gear screw for the fixed fork by hand; if at the same time the screw will have axial or radial movement (play of the fork relative to the steering gear cover), then the screw bearings must be adjusted.
- Adjustment is done in the following sequence:
- disconnect the bipod 18 and the fork shaft 12 of the steering wheel;
- . unscrew the bolts securing the steering gear to the bracket and remove the steering gear from the car;
- . drain the oil through the hole closed by the plug 4;
- . take out two plugs 20 on the crankcase;
- . remove the two covers 17 and 19 and the sponge seal 16 of the sector shaft;
- . remove retaining ring 14;
- . straighten the holes on the bearings of the sector shaft with a beard and remove them with a puller, eliminating shocks and distortions on the bearing;
- . remove shaft-sector 3;
- . unscrew the bolts securing the upper crankcase cover, remove the cover and take out one of the shims 5;
- . reinstall the crankcase cover and check the torque of the screw in the bearings.
The torque should be 0.4-0.8 Nm. In this case, no play of the screw should be felt;
. install the sector shaft 3 and bearings, lubricating the seating surfaces and sealing rings with steering oil.
During installation, the bearings should be eccentric downwards (the shaft-sector is as far away from the ball nut as possible).
Skewing during assembly is not allowed.
Jamming of bearings on the sector shaft or crankcase indicates misalignment or incorrect orientation of the bearing eccentricities;
- . adjust the engagement in the nut-sector pair;
- . to fix the bearings of the shaft-sector from rotation by bending the shoulder on the bearings into the holes on the crankcase;
- . assemble the steering gear in reverse order;
- . install the steering gear on the car;
- . pour oil;
- . install the bipod 18 and the shaft yoke 12 (when installing the wedge 10, the nut 6 and washers should be on the side of the machined end on the yoke 8).
Adjusting the engagement of a pair of nut - steering gear sector.
The gap in the engagement of the working pair is considered acceptable if the play at the lower end of the bipod with the wheels positioned for moving in a straight line with the propeller bearings adjusted is not more than 0.3 mm.
If the backlash exceeds this value, then it is necessary to adjust the engagement of the nut-sector pair, since the operation of the car with excessive backlash leads to failure of the steering mechanism.
The sequence of operations for checking the engagement of the pair is as follows:
- - put the wheels in the position of driving in a straight line and by turning the steering wheel, align the mark “C” at the end of the screw with the rib “B” of the top cover 9 (the mark “O” should be at the bottom);
- - disconnect the longitudinal steering rod from the bipod; - while shaking the bipod with your hand, determine the play at its end (in this case, the axial play of the screw should not be felt).
If the bipod play is greater than 0.3 mm, adjust the engagement of the pair in the following order:
- . remove the steering gear from the car;
- . remove two plugs 20 on the crankcase near the sector shaft;
- . disconnect the bipod 18, remove the two covers 17 and 19 and the sponge seal 16 of the sector shaft;
- . straighten the holes on the bearings of the shaft-sector 3 with a beard;
- . adjust the engagement of the nut with the sector by simultaneously turning the outer rings 15 in the crankcase holes clockwise from the side of the splines on the sector shaft.
When adjusting, exclude the possibility of misalignment of the shaft-sector in the outer rings (incorrect orientation of the bearing eccentricities).
The torque of the screw on the adjusted mechanism should be 1-1.8 N:
- - fix the shaft bearings from turning - sectors by bending the shoulder on the bearings into the holes on the crankcase;
- - re-check the torque of the screw and the play at the end of the steering arm;
- - install two plugs 20 on the crankcase, sponge seal 16 of the sector shaft (lubricating and the shaft-sector under it with grease), two covers 17 and 19 and bipod 18;
- - install the steering gear on the vehicle;
- - connect the tie rod to the bipod and cotter pin.
On the new steering gears, the screw turning torque has been increased (to compensate for the running-in of parts) to 1.8 ± 0.35 Nm.
If you need to adjust the column locking mechanism, you must:
- - remove the lower casing 8 by unscrewing two screws and releasing it from the lower clamp;
- - remove the upper casing 24, bringing the dispenser as close as possible to the driver;
- - loosening the locknut, tighten the bolt to a torque of 9.0—12 .5 Nm (0.9-1.25 kgf/m);
- - fix the locknut with a torque of 14-18 Nm (1.4-1.8 kg/m), eliminating the bolt loosening;
- - check column fixation;
- - install the upper and lower covers.
Let's look at the adjustment in more detail in the pictures
You can also adjust the clearance in the propeller bearings on the car, but for subsequent adjustment of the engagement of the nut - shaft-sector, it is more convenient to immediately remove the steering gear.
1. Remove the steering gear.
- 2. To avoid damage, remove the plastic cover
- 3. Remove the foam seal.
- 4. With the “13” head, we unscrew the four bolts securing the upper cover of the crankcase of the mechanism
- 5. Prying off with a screwdriver, remove the cover
6. Remove one of the shims.
We install the cover, tighten the bolts and check the play.
If there is a backlash, remove another gasket.
Having achieved the absence of backlash, we adjust the gap in the engagement of the nut-shaft-sector pair.
To do this, we install a bipod on the shaft and, having slightly tightened its nut, rotate the screw to move the bipod to the middle position, after which we swing the sector shaft by the bipod.
The travel of the end of the bipod should not be felt (exceed 0.3 mm).
7. If it is larger, then prying with an awl or a thin screwdriver, remove the plastic cover
- 8. We take out two plugs.
- 9. Using pliers, remove the spring rings on both sides of the mechanism case.
10. With a thin beard, with a blunt end, we straighten the holes on the edge of the outer ring of the sector shaft bearings
11. Using a special key, we turn the eccentric outer rings of the bearings in the crankcase holes clockwise from the side of the splined end of the sector shaft.
When adjusting, it is necessary to exclude the possibility of misalignment of the sector shaft, for which we turn both bearings alternately at a small angle until the gaps in the engagement are eliminated.
The torque of the screw on the adjusted mechanism should be 10–18 kgf.cm.
We fix the eccentric rings from turning by bending their flanges into the crankcase holes with a beard.
We assemble the steering mechanism in the reverse order and install it on the car.
Foam rubber when assembling, we wet the shaft-sector sealer with gear oil, and the spline connection with SHRUS-4 or SHRB-4 grease.