- Motor Grader:
- 14M (S/N: B9J1-UP)
Introduction
The problems that are identified below do not have any known permanent solutions. Until permanent solutions are known, use the solutions that are identified below.
Problem
Several reports have been received regarding fine copper particles in the drive axles on certain 14M Motor Graders. The 304-8429 Bearings on the 14M final drive planetary have brass cages in addition to the brass sleeve bearings and thrust washers in the differential. This is a likely reason for higher brass generation on certain 14M Motor Graders.
Solution
To this date, Caterpillar is not aware of any field failures due to the copper generation. Continue to monitor machines through Scheduled Oil Sampling (SOS) and with regular inspections of the screen and filter. Repair actions should not be completed on the basis of copper readings alone.
An increase in copper in the oil sample or copper in the filters does not necessarily indicate a pending problem. Copper is a soft metal which is not abrasive and copper does not cause wear of other components. A potential problem is suspected if copper and another element increase simultaneously.
High copper readings can be present in oil from sources that may not cause a failure. Caterpillar does NOT recommend the repair of the power train solely on the copper reading of the SOS.