COVER 2500692 - Caterpillar

Illustration 1. New tooling for positive pin retention track on D11N Tractors. The field tooling for D11N Tractors must be used with the new 8T7780 Track Repair Group shown in Illustration 2. The serviceable components of the track repair group are also shown in Illustration 2. The 5P9729 Track Repair Group can be converted to the 8T7780 Track Repair Group with the 8T9199 Conversion Kit.
Illustration 2. Serviceable components of the 8T7780 Track Repair Group.The serviceable components of the 8T3261 Loader Assembly are identified in Illustration 3. The serviceable components of the 8T3259 Extruder Assembly are identified in Illustration 4.
Illustration 3. Serviceable components of the 8T3261 Loader Assembly.
Illustration 4. Serviceable components of the 8T3259 Extruder Assembly.Illustration 5 and Chart B show the correct dimensions for the track assembly tooling.
Illustration 5. Track press tooling dimensions. A new 8T9130 Hydraulic Wrench and 8T9174 Socket (2 1/16") have been released to tighten track shoe bolts on D11N Tractors. They are shown in Illustration 6.
Illustration 6. Track shoe bolt tightening tool for D11N Tractors.Chart C lists the tooling needed to install new seals in the idlers and rollers on D11N Tractors.
Undercarriage Reconditioning Guide Bulletin No. MP-11 has more detailed information about the assembly of idlers and roller with inverted Duo-Cone Seals.