TUBE 5348578 - Caterpillar

Problem
D8L link assemblies, track roller groups, and track roller shells are no longer available. When D8L undercarriage needs replacement due to wearout, an upgraded system incorporating D8N components is required.
Affected Product
Model & Identification Number
D8L (4FB1-Up, 7YB1-Up, 7JC1-Up, 53Y1-Up)
Parts Needed
Refer to Special Instructions SEHS9720 for required parts.
Action Required
D8L link assembly replacement requires that new D8N track rollers also be installed. D8L idlers and sprockets can continue to be used and will continue to be serviced.
Two options are available for D8L undercarriage replacement:
Option A
Install a new D8N link assembly and track roller groups.
OR
Option B
Install a new D8N link assembly and reshelled track roller groups.
Service Claim Allowances
Option A
This is a 2-hour job.
Option B
This is a 2-hour job.
The above SERVICE CLAIM ALLOWANCES reflect Caterpillar's participation towards the cost of converting from D8L to D8N undercarriage. This does not reflect any particpation toward the cost of new undercarriage.
Parts Disposition
Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.