CLAMP-BENT BOLT 3887020 - Caterpillar

Brown Color Variation
The brown color variation is caused by a chemical reaction between condensation and deposits on the surface of the bearing. This may lead to corrosion on the bearing surface. If the corrosion penetrates below the tin flash into the bearing do not use the bearings. If there is any confusion if the bearing stain is a surface stain or an indication of deeper corrosion do not use the bearings. Do not use bearings that display dark brown or dark purple or black discoloration that is corroded into the overlay. Refer to the illustrations below. Note: Do not confuse brown discoloration with a rust preventive that may be applied at the supplier. The rust preventive adds additional corrosion protection during shipment. Follow the cleaning procedure in Reuse and Salvage Guideline, SEBF8009 in order to determine if the discoloration is a rust preventive.Bearings that Are Unacceptable for Use
Do not use any bearing with any of the following conditions:
Dark brown, dark purple or black spots that are corroded into the overlay.
Large areas of dark brown discoloration similar to illustrations below.Bearings that Are Acceptable for Use
Bearings with the following conditions are suitable for use:
Light shallow stains that do not penetrate the overlay.
Gray color variation that changes in intensity from light gray to dark gray.
Color variation on the sides of the bearings is acceptable because the side of the bearing is not part of the rotating element of the design.
Illustration 1 g03269617
Material code
Illustration 2 g03269636
The bearing has a large amount of stain on the surface of the bearing. Do not use the bearing.
Illustration 3 g03269641
The bearing indicated that the corrosion (2) has penetrated the tin overlay. Do not use the bearing.
Illustration 4 g03269776
The bearing indicated that the corrosion (3) has penetrated the tin overlay. Do not use the bearing.
Illustration 5 g03269796
The bearing has stain (4) on the surface. Do not use the bearing.
Illustration 6 g03269799
The bearing has a small stain on the surface. The stain has not penetrated the surface and is acceptable for use.
Illustration 7 g03269816
Any stain on the edge or corrosion on the edge of the bearing is acceptable
Illustration 8 g03269839
The bearing indicates the tin flash thickness color variation. This bearing is acceptable for use.
Illustration 9 g03269841
This bearing has light staining on the surface that has not penetrated the surface and is acceptable for use.
Illustration 10 g03269843
The bearing has a small stain on the surface as well as the tin flash thickness color variation. The stain has not penetrated the surface and is acceptable for use.
Illustration 11 g03269847
The bottom bearing has a small stain on the surface. The stain has not penetrated the surface and is acceptable for use. The top bearing has some water marks on the face as well as some tin flash thickness color variation. This bearing is also acceptable for use.Note: For additional information on usability of Main Bearings and Connecting Rod Bearings please refer to Reuse and Salvage Guideline, SEBF8009.