The device of the wheels. KAMAZ vehicles with a glued 6X4 formula include two single front steering wheels and four dual rear drive wheels

The front wheels of KamA3 cars are discless with spoked hubs, with split rims and pneumatic tires with a universal tread pattern.

Kamaz car front wheel

The front wheel (fig. 1) consists of a hub, rim and tire.

In the center of the hub there is a cavity in which there are sockets for installing bearings and a hub collar.

There are five spokes on the hub, evenly spaced around the circumference.

The ends of the spokes end in conical supports designed to fit the tapered surface of the rim. The 28° cone angle provides, when tightening the nuts, the frictional force necessary to securely connect the rim to the hub and prevent it from turning when braking.

The studs for attaching the rims to the wheel hubs are right hand threaded. There are five holes in the body of the hub between the spokes for the brake drum mounting bolts.

The bolt nuts are self-locking.

To reduce tire wear and improve vehicle stability and handling, the hub and brake drum assembly is balanced.

Permissible unbalance 700 Nm.

To eliminate the imbalance in production, the heaviest place of the hub with the drum assembly is first determined, and then a load is welded to the outer surface of the brake drum from the opposite side.

The mass of the load is determined by the magnitude of the unbalance to be eliminated.

The wheel rim with a conical landing shelf is collapsible. It consists directly of the rim, the lock ring and the bead ring.

On the one hand, the rim flange ends with a bead, on the other hand, with a shaped section designed to fit on the conical surfaces of the spokes and accommodate the bead and lock rings.

The lock ring is split. It is made of a special steel profile. The bead ring is also steel.

Pneumatic, chamber tire with a radial cord and a universal tread pattern.

The tire marking is 260-508P, which means: 260 is the width of the inflated tire profile in mm, 508 is the outer diameter of the rim, P is a tire with a radial cord.

The tire and rim assembly is balanced against the conical surface and the end of the rim.

Permissible unbalance 0.3 Nm. The imbalance is eliminated by installing balancing weights.

The number of loads, depending on the imbalance to be eliminated, may be different, but should not exceed five. When installing the load, impacts on it and the spring should be excluded.

The load must be tightly pressed against the lock ring, the protrusion of one load relative to neighboring ones should not exceed 3 mm.

KamaZ rear wheels

The rear wheels of KamAZ 6X4 vehicles are also discless. The rim of the inner wheel is mounted on the conical surface of the spokes of the rear hub.

The distance between the tires of the twin wheels is provided with a spacer ring, which is corrugated for increased rigidity.

This ring also transmits to the inner wheel the tightening force of the nuts and clamps that secure the outer wheel.

Rear wheel clamps differ from front wheel clamps as they have a bevel that both centers and clamps the outer wheel rim.

The hubs rotate on tapered bearings mounted on the trunnions of the drive axles

Installing a Kamaz spare wheel

The spare wheels of vehicles with a 6X4 wheel arrangement (except for the KamAZ-5511 dump truck) are installed in a horizontal position above the right side member on the bracket 10 (Fig. ), which is fixed with five bolts on the frame side member.

The mechanism for raising and lowering the spare wheel is installed on the same bracket.

The gate shaft 4 is kept from turning in the opposite direction by the ratchet 3 and the latch 8, which is constantly pressed against the ratchet by the spring 7.

Installing a spare wheel of a KamAZ-5320 car: 1 - nut, 2 - belleville spring, 3 - gate ratchet, 4 - gate shaft, 5 - cable, 6 - nut, 7 - latch spring, 8 - gate latch, 9 - support, 10 - bracket

To lift the wheel, the shaft is rotated by the square shank with a balloon wrench, the cable 5 is wound around the shaft and lifts the support 9 together with the wheel. In the raised position, the wheel is fixed with a nut 6.

Installing a spare wheel of a KamAZ-5511 dump truck

On dump trucks KAMAZ-5511 spare wheel is fixed on the front side of the platform. Raising and lowering the wheel is carried out using mechanism 1 (Fig. 4) with cable 2, which is passed through block 3.

Fig. 4 Installing the spare wheel of the KamAZ-5511 dump truck

KAMAZ-4310 wheel

Fig. 5 Wheel of a KamAZ-4310 car: 1 - lock ring, 2.4 - side rings, 3 - tire with a chamber and rim tape, 5 - rim

On off-road vehicles with a 6X6 wheel arrangement, all wheels are single, which reduces the resistance to vehicle movement. Disc wheels, with a toroidal surface of the landing flanges of the rim 5 (fig.).

They are equipped with two bead rings 2 and 4, a locking ring 1 and a wide-profile tire 3 with an off-road tread pattern.

The tire model used is IP184, size 1220X400-533, which means: 1220 mm - outer diameter of the tire, 400 mm - profile width, 533 - outer diameter of the rim.

The tapered surfaces of the rim and bead rings provide an interference fit for the tire, which allows you to work with reduced air pressure in it. The wheels are attached to the hubs with ten studs and nuts.

The wheel hubs on the trunnions of the axles of cars with a 6X6 wheel arrangement are fixed in the same way as the front wheel hubs of cars with a 6X4 wheel arrangement: with a bearing nut and a lock nut, between which two washers are installed to prevent self-loosening of the nuts.

The centralized pneumatic system of KamAZ-4310 vehicles allows you to adjust the tire pressure from the cab within 80 ... 320 kPa, depending on road conditions.

The spare wheel on this vehicle is installed behind the cab in a special holder that has a mechanism for lowering and raising the wheel with a hydraulic drive.

To remove the spare wheel, disconnect the pinch screws, set the handles on the pump to the "Lower spare wheel" position and lower the wheel.

To lift the spare wheel, install it in the hinged bracket of the holder and, swinging the pump handle in the "Lifting spare wheel" position, raise the wheel and secure it with the pinch screws.

The position of the handles for raising and lowering the spare wheel is shown on the plate on the pump.

On KamAZ-43105 vehicles, the spare wheel holder is installed on the inside of the front side of the platform. A removable winch is provided to lift the spare wheel.