Product Support Program For Installing Reinforcing Plates To The Boom Towers Of Certain 446 Backhoe Loaders Caterpillar

NOTE: The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.

NOTE: This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS4754" as the Part Number and "7755" as the Group Number. If administered before failure, use "56" as the Warranty Claim Description Code and use "T" as the SIMS Description Code. If administered after failure, use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code.

NOTE: This Revised Service Letter replaces the February 29, 1992 Service Letter. A change was made to the illustration notes.

Termination Date

Problem

The boom towers may bend on certain 446 Backhoe Loaders. Reinforcing plates can be installed to increase the strength of the boom tower.

Affected Product
Model & Identification Number

446 (6XF1-574, 6XF576-581, 6XF586, 6XF591-603, 6XF613, 6XF638)

Parts Needed

Fabricated - See Illustrations 2 and 3.

Action Required

Fabricate reinforcement plates and weld into position on the boom tower as shown in the illustrations.

Illustration 1

Illustration 2

Illustration 3

Illustration 4

Service Claim Allowances

NOTE: This is a 5-hour job.

Parts Disposition

Handle the parts in accordance with your Warranty Bulletin on warranty parts handling.