ZIL-131 disc wheels with split rim and spacer ring, interchangeable, rim size 9.0 RG - 20

Tires in sizes 12.00--20 adapted for variable pressure operation

The spare wheel is installed on the car without tire pressure and without the spool in the valve.

When assembling a spare wheel with a tire and tube (after repairing the tube), the tire must be inflated to the nominal pressure, after which it must be deflated.

Without waiting for the complete release of air from the valve of the spare wheel chamber, a cap must be screwed onto the valve.

Wheel assembly with ZIL-131 tire

The wheel consists of a rim 3 with a welded disc, a seat ring 4 and a bead wheel 5.

The spacer ring 9 prevents the tire from turning on the rim with reduced air pressure.

The presence of conical shelves on the rim requires especially careful assembly and disassembly of the wheels, compliance with all instructions for maintenance and operation, and the use of mounting tools.

The tires of the car have a directional tread pattern, and it is necessary to install spiked wheels on the car in strict accordance with the direction of the pattern (see Fig. 1, b).

The direction of rotation of the wheels in the figure is indicated by an arrow.

Before assembling the wheel, you must:

  • a) remove dirt, rust and rubber residue from the surface of the wheel, especially from the rim surfaces of the bead and seat rings facing the tire;
  • b) inspect the wheel externally;
  • c) paint the cleaned parts of the wheel with quick-drying enamel;
  • d) inspect the tire and chamber, remove dirt, dry them, sprinkle with talc the inner surface of the tire; the seating surface of the tire beads must not have rubber sagging.

Assemble the wheel with the tire in the following order:

  • 1. Lay the tire on the side surface with which it will face outward, taking into account the direction of the tread pattern.

Put the inner tube into the tire so that the valve is pointing down, and straighten out the folds of the inner tube.

  • 2. Open the lock of the spacer ring. Keep your hands at a distance of 150-200 mm from the cut of the ring.

Insert the spacer ring into the bar so that the hole for the valve is pointing down.

  • 3. Insert the chamber valve into the spacer ring valve guide hole and close the lock using a straight spudger.
  • 4. Center the spacer ring in relation to the tire beads with light blows from the hammer handle.
  • 5. Insert the rim into the tire so that the valve guide on the spacer ring aligns with the valve groove on the rim.
  • 6. Turn the tire with the rim bolted up and insert the seat ring between the rim and the bead.
  • 7. Install the bead ring so that the nuts can be screwed on and tightened. The tightening torque should be 25-35 kgm.

The tire beads are clamped with 17 nuts 2 on the bolts 1 using the bead ring 5. Nuts and bolts have right-hand threads on all wheels.

The bead ring fastening nuts must be tightened evenly, alternately tightening mutually opposite nuts.

  • 8. Inflate the tire to a pressure of 3 kg/cm2.

Disassembly of the tire must be carried out in the following order:

ZIL-131 wheel dismantling techniques

  • 1. Release the air completely from the chamber.
  • 2. Loosen four nuts diametrically opposed to each other.
  • Then, one by one, loosen the rest of the nuts and unscrew them.

Lastly, unscrew the four nuts that were loosened earlier.

Never loosen the bead ring nuts without first venting the tire.

  • 3. Remove the bead ring with the flat end of a straight spudger (position 1 in fig. 2).
  • 4. Remove the landing ring, for what; insert the mounting blade with a curved grip into the groove located near the cut of the seat ring from the inside, and press the mounting blade down (position II) repeat the operation for the remaining slots.

Do this technique several times and ensure that the end of the seat ring, on which the grooves are located, is taken out;

  • - insert a straight mounting blade with a straight end between the end of the rim and the curved part of the seat ring, fix this position;
  • - also place the curved end of the mounting blade with a crooked grip between the end of the rim and the seat ring and press it down (position III), thus completely removing the seat ring.
  • 5. Turn the wheel over, insert a straight mounting spatula between the rim flange and the tire bead until it hits the rim and push it down.

Insert a mounting blade with a curved grip into the resulting gap between the tire and the rim.

Press both mounting blades in this engagement down (position IV).

Repeat the previous operation around the entire circumference until the tire bead is completely removed from the conical rim flange.

If it is not possible to remove the rim by hand, then it must be removed from the tire using the technique shown in fig. 1 (V position).

  • 6. Stand the tire vertically, push the valve into the cavity of the tire through the hole in the valve guide on the spacer ring.

Open the lock of the spacer ring using a spudger (position VI), then rotate the ring inside the tire by 90° and remove it completely (position VII).

The wheel is attached to the hub with eight studs. To prevent self-loosening of the wheel nuts, the right side hub studs are right-handed, the left side hub studs are left-handed.

To indicate the left-hand thread, nuts have a circular slot at the corners of the faces, and on the studs - at the end.

When putting on the wheels, the wheel nuts to the hubs must be tightened evenly crosswise, alternately tightening mutually opposite nuts. The tightening torque of the wheel nuts must be at least 40 kgm.