KIT- 4732191 - Caterpillar

Inflation of Tires with Nitrogen (N2)
Caterpillar recommends using dry nitrogen (N2) gas for both tire inflation, and tire pressure adjustments on all rubber tired machines. Nitrogen is an inert gas and will not support combustion inside the tire.
Proper nitrogen inflation equipment, and training in using the equipment, are necessary to avoid over inflation. A tire blowout or rim failure can result from improper or misused equipment.Because a fully charged nitrogen cylinder's pressure is approximately 15 000 kPa (2200 psi), a tire blowout and/or rim failure can occur if the inflation equipment is not used correctly.
In addition to reducing the risk of an explosion, using nitrogen 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 (4 or more years). It also reduces the corrosion of rim components and the resultant disassembly problems.
Stand behind the tread when inflating a tire.
Set the tire inflation equipment regulator at no more than 140 kPa (20 psi) over the recommended tire pressure.
Use only Caterpillar Part 6V4040 Nitrogen Tire Inflation Group, or equivalent, to inflate tires from a nitrogen gas cylinder. Refer to Special Instruction, Form SMHS7867, for tire inflation instructions.Use the same tire pressures for nitrogen inflation that are used for air inflation. Consult your tire dealer for operating pressures.
The chart below is for shipping pressures only. Consult your tire dealer for operating pressures.
651E Tractor
651E Scraper
657E Tractor
657E Scraper
Adjusted Inflation Pressures
A tire inflated in a warm shop area will be underinflated if the machine works in freezing temperatures. Low pressure shortens the life of a tire.When operating in freezing temperatures, consult the Cold Weather Operation Guide, Form SEBU5338 for adjusted inflation pressures.Roading
Before roading a machine, consult your tire dealer for recommended tire pressures and speed limitations."TON km/h" (TON MPH) limitations must be observed. Consult your tire dealer for the speed limit of the tires involved.When traveling long distances, stop every 40 km (25 miles) or 3 hours for 30 minutes to allow the tires and components to cool.