LINES GP-AFTERCOOLER AIR 1419842 - Caterpillar

Rolling Radius
The rolling radius parameter is used to determine speed displayed on the speedometer. Rolling radius varies depending on the tire installed on the machine. Use Table 2 to determine rolling radius for your machine.
Table 2
Rolling Radius    
P/N     Description     RR (mm)    
3017779     17.5/65-20 10PR SGLA (FAST GRIP)     517    
3017780     17.5/65-20 10PR SGLA (SNOW GRIP)     531    
3017781     14-17.5 FWD CONTRACTOR TITAN     439    
3017782     405/70R18 STP9 DUNLOP     491    
3017785     335/80R18 XZSL MICHELIN     474    
3017786     340/80R18 XMCL MICHELIN     480    
3017787     12.5/80 18 STL FIRESTONE     468    
2592935     14.5 - 20 E91 DUNLOP     523    
2592925     405/70R20 SPT9 DUNLOP     527    
2592928     12.5 X 20 ATU FIRESTONE     500    
2954000     400/70 R20 XMCL MICHELIN     518    
2592932     375/75R20 XZSL MICHELIN     519     If you are not using one of the tire sizes detailed in Table 2, then calculation will be necessary to attain the correct rolling radius. The following steps detail the procedure for measurement of "Rolling Radius":
Ensure that tire pressures are correct for the particular type of tire installed on the machine.
Park the machine in the straight ahead position (use Articulation Lock if necessary to ensure that machine is Straight).
Mark the Front tire in the center of the contact patch.
Mark the Ground in line with the mark in the center of the contact patch on the Front tire.
Mark the Rear tire in the center of the contact patch.
Mark the Ground in line with the mark in the center of the contact patch of the Rear tire.
Drive forward slowly (1 - 2 kph).
Once the marks on tire have made three or four revolutions (can be more, for a more accurate value), stop the vehicle when the first mark (whether that is the front or rear tire) is again in the center of the contact patch.
Mark the Ground in line with the mark in the center line of the contact patch.
Continue to drive the machine slowly forward until the second mark is in the center of the contact patch.
Once the second mark is in the center of the contact patch, stop the vehicle and mark the ground.
Note down the number of full revolutions that the tires completed.
Measure and note down the distance between the starting point for the Front tire and the finishing point after three or four revolutions.
Measure and note down the distance between the starting point for the Rear tire and the finishing point after three or four revolutions.
To determine the Rolling Radius of each tire, use the following formula:Rolling Radius (mm) = (Distance Travelled (mm) / Number of Revolutions) / (2*pi)Where pi = 3.14