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Mounting and demounting safely

A safe mounting of heavy tires requires great care and has a strong effect on the driving qualities and the service life of the tires. At worst, an incorrect mounting of the tire onto the rim may cause the tire to burst, leading to a risk of serious injury. Therefore it is important that an agricultural tire is always mounted and demounted by a qualified professional, who knows the procedure from inside out and has all the appropriate tools for it.

Before mounting

1. Make sure that the rim, the tire (and the tube) are compatible, and that the tire is suitable for your machine. Use only rims recommended or permitted by the tire manufacturer.

  • Check that the tire can be fitted onto the rim (table).
  • Check the correspondence of rim diameter (DW16L x 30) and tire diameter (19.4 R30).

Note: No rounding up or down. There are rims in the market with seat diameters 16.5" and 16.1" – never fit 16" tires to these rims.

2. Mounting used tires/rims or tubeless tires

  • When mounting onto a used rim, check that the rim is clean and intact with no visible damage. Never mount a tire to a damaged or deformed rim.
  • When mounting a used tire, examine it carefully to see if there are any damages that must and can be fixed before mounting onto a rim.
  • When mounting a tubeless tire onto a rim, make sure to insert a new tubeless valve each time.

Note: When changing tire sizes or types, always check the relationship between the rolling circumferences and make sure that the combination is within the limits given by the tire manufacturer.

Preparing for mounting

Lubricate the rim seats and tire beads so that the lubricant is applied up to 2 inches higher than the rim edge on the outside of the beads. Also lubricate the inside of the bead in order to prevent damage. Make sure that the lubricant is suitable for this particular use. Never use silicone, antifreeze or hydrocarbon-based products.

Mounting the tire onto the wheel

To mount the tire on the wheel:

  1. Position the valve/valve hole at the bottom.
  2. Position the bead-breaker "window" away from the valve to avoid damaging the bead.
  3. Lift the tire into the rim so that the first tire bead is on the rim edge. Consider the rotation direction (arrow on the side of the tire).
  4. Turn the first bead over the rim edge and push it into the deepest rim well. Lightly tighten the valve nut. When fitting an inner tube, position it slightly inflated inside the tire.
  5. Bring the second bead over the rim edge and push it into the deepest rim well.
  6. Finish tightening at the valve.
  7. Center the tire by slightly lowering the jack to approach the center of the tire on the rim.
  8. Remove the valve core and inflate slowly to ensure that the beads are in the right position. When using inner tubes, make sure that the beads are not pinching it.
  9. Inflate to 1,0 bar* to ensure that the beads are in right positions. Do not exceed the pressure.

Note: *1,5 bar for tires with tire diameter <15"

Inflating and positioning the beads

SAFETY FIRST

Inflating entails the most remarkable safety risk in the tire industry, yet one that can be minimised by carefully observing all safety instructions.

Top 7 Safety instructions for inflating

  • Check that the tire is correctly mounted and the beads are in right positions
  • Use a safety cage
  • Use safety goggles, safety shoes and safety earmuffs
  • Use inflation guns with a long extension tube (min. 5 m)
  • Never stand in front of the wheel
  • See the inflation pressure recommendations in your tire manufacturer's manual
  • If you notice anything abnormal, deflate the tire and start over by checking the rim and mounting first.

Preparing for inflating

Check that the beads are in right positions, centered to the rim edges. Inflate up to 1 bar to ensure this. If not, deflate and lubricate again. Inflate to 1 bar and check again. Repeat this until the beads are correctly positioned.

Inflating

Always use an intact inflation gun with a calibrated pressure gauge, connected to the valve with an air extension tube (min 5 meters) and a clip system on the valve side. Never stand directly in front of the wheel.

Steps to inflate a tire are as follows:

  1. Remove the valve core.
  2. Tighten the valve nut by hand.
  3. Inflate to the target pressure (fitting pressure, operating pressure or storage/shipment pressure determined by the tire manufacturer).
  4. Screw on the valve cap.

After tire mounting, regularly check that the nuts are still tight, at first after approximately three hours of use.

Removing the rim

Never remove the tire when it is inflated. Also, use appropriate tools only in order to avoid damage.

  1. Ensure that the tire is completely deflated. Remove the rim nut and push the valve through the valve hole (when using inner tubes).
  2. Unseat the beads beginning from the removal notches (if applicable). When using a hydraulic unseating tool, place it between the tire bead and rim flange to force the bead off the seat.
  3. Carefully lubricate the rim flange and tire beads.
  4. Push the outside bead at the bottom into the well. Insert the tire lever under the bead at the top and pry the bead over the rim flange.
  5. Hold that part over the rim flange with one tire lever and pry the next bead section over the flange with another one.
  6. Holding the tire lever under the inside bead at the side of the tire, pry the rest of the inside bead over the flange.Holding the tire lever under the inside bead at the side of the tire, pry the rest of the inside bead over the flange.

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