9.3. Frame and towing device


Fig. 8.37. Frame of cars of family UAZ-31512: and – for cars with a forward spring suspension bracket; 1,7,11,13,14 – cross-pieces; 2 – longeron; 3 – forward arm of fastening of the engine; 4 – arm of fastening of the forward shock-absorber; 5,8,10 – arms of fastening of a body; 6 – back arm of fastening of the engine; 9 – muffler suspension bracket arm; 12 – support of an arm of a back spring; 15 – arm of fastening of the back shock-absorber; 16 – axis of the forward end of a back spring; 17 – support of an arm of a forward spring; 18 – arm of fastening of a starting heater of the engine; 19 – arms of fastening of a radiator; 20 – arm of a forward spring; 21 – arm of fastening of facing of a radiator; 22 – spring arm; 23 – arm of cross draft; 24 – stabilizer arm; 25 – arm of the longitudinal lever


Fig. 8.38. Frame of cars of family UAZ-3741: 1 – longeron; 2,3,8,9,10,14 – cross-pieces;
4 – forward arm of an engine mount; 5 – arm of fastening of the forward shock-absorber;
6 – arm of fastening of a body; 7 – amplifier of a longeron; 11 – arm of fastening of the back end of a spring; 12 – arm of fastening of the back shock-absorber; 13 – arm of fastening of the forward end of a spring; 15 – arm intermediate fastenings of a cable of parking brake system;
16 – arm of fastening of a radiator; 17 – arm of fastening of a forward brake hose;
18 – arm of fastening of the lever of parking brake system; 19 – arm of fastening of a case of the steering mechanism; 20 – forward hook


Frame of cars (rice. 8.37, 8.38) consists of two longerons connected among themselves by cross-pieces.

Fig. 8.39. The towing device with an elastic element: 1 – cap; 2 – pin; 3 – persistent nut; 4 – case; 5 – elastic element; 6 – arm; 7 – towing hook; 8 – "doggie"; 9 – latch; 10 – washer; 11 – press butterdish; 12 – chain; 13 – forelock


Towing device (rice. 8.39) with an elastic element it is intended for operation of the car with the trailer.

Fig. 8.40. Towing device of a rigid design: 1 – case; 2 – "doggie"; 3 – latch;
4 – forelock; 5 – chain


On cars UAZ-31512, UAZ – 3741, UAZ-3962, UAZ-2206 is established the towing device of a rigid design (fig. 8.40) which for long work with the trailer is not calculated.
Forward part of a frame of cars with a spring suspension bracket is executed under installation of a spring suspension bracket, back – under installation of low-laminated springs.
The frame of the car UAZ-3153 in comparison of UAZ-31512 is extended on 380 mm with the corresponding increase in base of the car. Lobbies (from each party) and back (on the left side) the ends of longerons of a frame are equipped with towing loops.
The frame of cars UAZ-33036, UAZ-39094, UAZ-39095 in comparison with a frame of the car UAZ-3741 is executed under the increased base of the car (2550 mm instead of 2300 mm) due to movement of arms of fastening of back springs back. Length of longerons remained former.

Maintenance
Improve fastening of forward towing hooks, a forward bumper, mudguards of the engine, a removable cross-piece and rear bumpers in process of operation of the car.
Check reliability of fastening of the towing device to a back cross-piece of a frame and grease the rubbing surfaces as directed of the table of greasing. Oil axes of a latch and a doggie liquid.
At operation towing at-bora longitudinal movement of a hook in the case can appear. For its elimination squeeze an elastic element, having tightened a nut 3 (see rice. 8.39) so that the collected hook freely rotated around the axis without notable axial movement in the case.

Repair
Eliminate distortions and cracks in details of a frame with editing and tea leaves, in some cases with the help of installation of amplifiers in places of malfunction. A frame govern in a cold state.
When weakening rivet connection of arms cut down rivets, ream openings and establish rivets of bigger diameter. Before it cut out in the amplifier of a longeron over an arm a window for access to rivets from the internal party of a longeron, and after installation of new rivets make a window.
At impossibility of repair of rivet connection replace rivets with bolts with the nuts corresponding to diameter of openings in longerons and arms.