Steering gear
Includes a worm gear located in the crankcase 13 (pic. 124), steering wheel 16, steering shaft 14 and mounting parts.
The steering wheel is plastic, reinforced with a steel frame. A sound signal switch is installed on the wheel, the contact part of which is closed with a plastic cover. The steering wheel hub has a hole with a double cavity, and the shaft 14 has a double slot, due to which the steering wheel is attached to the shaft with a nut in only one position.
The steering shaft with its tip is connected to the worm shaft with the help of splines and a coupling bolt. The upper part of the shaft rests on a plastic sleeve installed in the tube 17 of the upper shaft support. This pipe is inserted into the bracket 18 and fixed in it with a clamp, which is tightened with a bolt. A switch for direction indicators and headlights is attached to the flange of the pipe of the upper shaft support.
Bracket 18 of the steering shaft is attached to the body with four bolts. The bracket and the upper part of the shaft are covered with plastic casings 15.
The crankcase of the steering mechanism is attached to the left side member 19 of the body from the inside of the engine compartment with three bolts. Adjusting washers are installed between the crankcase and the spar, by selecting which they achieve the alignment of the worm shaft and the steering shaft.
In crankcase 7 (pic. 125) a worm 6 is located, which engages with a double-ridged roller 12 of the bipod shaft 11. The gear ratio of the worm pair is 16.4. The worm is pressed onto the shaft 13 and rotates in the upper 14 and lower 15 bearings, and the inner races of the bearings are the end surfaces of the worm, on which the running tracks for the bearing balls are made. The axial clearance in the worm bearings is adjusted by selecting gaskets 16 between the crankcase and cover 17. These gaskets are supplied in spare parts in two sizes: 0.1 and 0.15 mm thick.
The bipod shaft rotates in two bronze bushings 10 pressed into the steering gear housing. At the upper end of the shaft, a roller 12 rotates on a needle bearing, and a bipod 8 is put on the lower end of the shaft, which has conical splines. Therefore, the bipod can be installed on the shaft in only one specific position.
The position of the bipod shaft, which ensures the correct engagement of the roller with the worm, is adjusted by screw 2. The axial clearance between the screw head and the groove of the shaft is eliminated by selecting adjusting plates 1, which are supplied as spare parts in eleven sizes with a thickness of 1.95 to 2.20 mm.
TAd-17i oil is poured into the crankcase of the steering gear at the level of the filler hole in the cover 5, closed with a plug 4 (12, in fig. 124).
Steering gear
Includes three traction - medium 3 (see fig. 124) and two extreme 1, as well as a bipod 2, a pendulum lever 4 with a bracket 10 on the spar 11 and pivot levers 9 trunnions 7 and the middle link 3 is solid, has ball joints at the ends for connection with the pendulum lever and steering arm. Each end rod consists of two threaded ends connected to each other by an adjusting sleeve 5. The sleeves are fixed on the rods with the help of two clamps 20. Rotation of the sleeve 5 changes the length of the side rod when adjusting the toe of the front wheels. The tips of the extreme rods with the help of ball joints are attached to the levers 9 of the pivot pins, to the pendulum arm and to the steering arm 2. The pivot pins rotate in the lower 6 and upper 8 hinges of the suspension.
The ball joints of the rods have a steel pin 1 (pic. 126), the spherical head of which is located in a conical plastic insert 4. The spring 5 presses the insert against the body 3 and creates an interference fit in the connection of the pin with the insert and the thrust tip.
During assembly, the ball joints are filled with SRB-4 grease and sealed on one side with a plug 6 rolled into the rod end, and on the other side with a rubber protective cap 2. Replenishment or replacement of lubricant during vehicle operation is not required.
Bracket 10 (see fig. 124) the pendulum lever is attached with two bolts to the right side member of the body against the steering gear housing. In bracket 2 (pic. 127) two plastic bushings 8 are installed, in which the axis 9 rotates. During assembly, Litol-24 grease is placed in the bracket. Replenishment or replacement of it in operation is not required.
The dimensions of the main mating parts and the limits of permissible wear are given in Table. 18.
