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FRAME INSTR 2277940 - Caterpillar



2277940 FRAME INSTR Caterpillar parts FRAME
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41
Alternative (cross code) number:
CA2277940
227-7940
2277940
Caterpillar 2277940 FRAME INSTR

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Inflation of Tires with Nitrogen
Improperly inflated tires can cause excessive heat build-up, resulting in blowouts.Proper nitrogen inflation equipment and training in its use are necessary to avoid over inflation. A tire blowout or rim failure can result from improper or misused equipment.
Over or under inflated tires can cause excessive or uneven tire wear, rim damage or tire failure.Keep the valve caps on to prevent dirt from entering the valve stems. Otherwise, valve damage can occur.
Caterpillar recommends using dry nitrogen (N2) gas for both tire inflation and tire pressure adjustments on all current and past production rubber tired machines. Nitrogen will not support combustion inside the tire.In addition to reducing the risk of an explosion, using nitrogen instead of air to inflate tires lessens the slow oxidation of the rubber and the accompanying gradual tire deterioration. This is especially important for tires that have an expected long service life (four or more years). It also reduces the corrosion of rim components and the resultant disassembly problems.
Set the tire inflation equipment regulator at no more than 140 kPa (20 psi) over the recommended tire pressure.
Because a fully charged nitrogen cylinder's pressure is approximately 15 000 kPa (2,200 psi), a tire blowout and/or rim failure can occur if the inflation equipment is not used correctly.
Stand behind the tread when inflating a tire.
Use only a Caterpillar 6V4040 Nitrogen Tire Inflation Group, or equivalent, to inflate tires from a nitrogen gas cylinder. See Special Instruction, Form SMHS7867, for tire inflation instructions.Use the same tire pressures for nitrogen inflation as would be used for air inflation. Consult your tire dealer for operating pressures.Check the inflation pressure with the tires cold and at the same outside temperature in which the machine will operate. Use a Caterpillar 4S6524 or 1P545 Tire Pressure Gauge or equivalent.Have your tire dealer inspect tires with deep cuts or gouges.Measure the tire pressure if a tire appears improperly inflated.Tire Pressures
Consult your tire dealer for the operating pressure when the machine is put into operation.
The inflation pressures shown in the chart are cold inflation shipping pressures for tires on Caterpillar machines.Pressures for each application will vary from those shown and should always be obtained from your tire supplier. The "R" in tire size denotes radial construction.Adjusted Inflation Pressures
A tire inflated in a warm shop area, 18°C to 21°C (65°F to 70°F), will be under inflated if the machine works in freezing temperatures. Low pressure shortens the life of a tire.When inflating tires in a heated area, make allowances in pressure for cold, outside temperatures. See the Cold Weather Recommendations Operation and Maintenance Guide, Form SEBU5898, for adjusted inflation pressures.


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