PISTON 7G0730 - 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 g02995976
(1) 356-1487 Spindle
Illustration 2 g02998278
Spindle with laser heat treated rings
Illustration 3 g02998280
Spindle without laser heat treated ringsThe 356-1487 Spindles are part of the 279-7458 Rear Wheel Gp and 247-5520 Rear Wheel Gp . The 356-1487 Spindles that are being used for the spindle replacement program may vary in appearance due to procurement from various sources.The process difference used by various sources may lead to slight differences in appearance as shown in Illustration 2 and Illustration 3, especially in the bearing surfaces.Solution
Some 356-1487 Spindles may not exhibit the typical dark gray circumferential striping in the bearing journal regions. All these spindles have been properly heat treated to meet or exceed the hardness requirements and are good to use.