TUBE 9K5691 - Caterpillar

Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.Problem
Illustration 1 g01914570
(1) Contaminated oil ringRemanufactured cylinder packs have been received by dealers that have buildup, which is caused by contaminated Volatile Corrosion Inhibitor (VCI) oil. Contaminated VCI oil is drying on the cylinder packs. This leaves a ring around the piston crown, which looks like rust. The buildup of oil that is around the outside of the piston crown is shown in Illustration 1.Solution
Only the remanufactured cylinder packs that are listed in the Table 1 should be inspected for buildup of contaminated oil on the piston crown.
Table 1
Cylinder Packs that are Affected    
OR-1572    
0R-4515    
0R-8200    
0R-8777    
0R-8778    
0R-9847    Only remanufactured cylinder packs have been recalled in order to be cleaned. Clean VCI oil will be reapplied to the remanufactured cylinder packs.
Illustration 2 g01914685
Remanufactured cylinder packs that have been cleaned and coated with VCI may still have stains that are related to cleaning. Refer to Illustration 2. These cylinder packs are acceptable to use for repair.