CASE GP-TRANSMISSION 4482138 - Caterpillar

Illustrations 46 & 47 Do not use again.Rust
Gears with light rust on the bearing bore can be used again if the rust can be removed by light polishing with crocus cloth and oil. Gears showing heavy rust cannot be used again because the rust will create pits.
Illustration 48 g02343161
Water inside the transmission caused excessive rust on the planet gear bearing bore.
Do not use again.Foreign Material
Foreign material, usually the result of another failure, can result in bearing bore indentations and pitting. Dents in the bearing bore can greatly reduce the bearing contact area and/or create cracks in the surface, resulting in substantially shortened bearing life.
Illustration 49 g02343197
Excessive amount of damage to the planet gear bearing bore due to foreign material.
Thrust Faces
Scratches
Light, circumferential scratches may be acceptable, but only if they do not catch a piece of tag wire or paper passed across the top of the scratched surface. Use a 6V-2010 Polishing Stone to remove any radial scratches or small nicks.Wear
Gears with more than 0.03 mm (0.001 inch) thrust face wear cannot be used again. To measure the amount of wear, place the gear on a surface plate. Measure the wear step with a dial indicator at several locations across the worn area, following the wear path from the inside to the outside. Wear must be even across the wear path.
Illustration 50 g02343236
Planet gear thrust face.
Do not use again if face wear exceeds 0.03 mm (0.001 inch).Planet Gear Thrust Washers
Newer, green, dark gray/black, or light brown thrust washers can be used again if they are not chipped, cracked, burned, melted, grooved, or worn. Do not reuse the older, tan color washers.Sun Gears
No pitting, spalling, or cracks are acceptable.Frosting is a condition caused by inadequate oil film between mating gear teeth surfaces. It appears as a cloudy area on the gear contact surface and is sometimes accompanied by small surface pits.Gears with frosting can be used again provided any surface pits are small enough that they do not catch a piece of tag wire passed along the frosted surface. Frosting accompanied by any pit that does catch a tag wire is unacceptable and the gear should not be used again.Frosting is different in appearance than abrasive wear or light surface rust. Abrasive wear, due to foreign material, usually covers the entire tooth face contact surface and has a more satiny, shiny appearance.Abrasive wear will usually appear on all gears and other transmission components. Light surface rust or corrosion can produce a mottled appearance, which has an irregular outline.Note: If abrasive wear is found in the gear train, correct the source of contamination. Light surface rust or corrosion can produce a frosted appearance, but usually is of irregular shape. Gears with this type of condition can be reused if there are no pits or other defects.
Illustration 51 g02343296
Surfaces of the sun gear teeth have become frosted and small pits have formed in the frosted area.
Do not use again.Ring Gears
Reusability of ring gears depends on the amount of damage or wear. Some damaged clutch ring