2012/12/24 Caterpillar

Compact Track Loader:

259B3 (S/N: YYZ1-UP)

279C (S/N: MBT1-UP)

279C2 (S/N: KWB1-UP)

289C (S/N: JMP1-UP)

289C2 (S/N: RTD1-UP)

299C (S/N: JSP1-UP)

299D (S/N: HCL1-UP)

299D XHP (S/N: NLC1-UP)

A new track idler group is now available. The triple flange design may improve track engagement for machines that work primarily on slopes and challenging underfoot conditions. Such conditions include uneven terrain, transitions, and stumps. The triple flange design may also improve track engagement for machines that operate in applications that require carrying heavy hydra-mechanical work tool.

Illustration 1	g02662118
(A) Example of front idler derailment. (B) Example of rear idler derailment.

In many instances, improvements can be seen when replacing only the idler at the location where derailments are most common. The additional flange provides increased retention preventing the track from twisting over the idler.

Note: Although triple flange idlers may improve track retention, there is still a possibility of track derailment under certain operating and underfoot conditions.

ReferenceSpecial Instructions, REHS5411, "Compact Track Loader Track Derailment Prevention and Repair Guidelines{4150}" for more information. This information includes details on proper operating techniques and a list of recommended solutions for track derailments.

Note: The 348-9647 Track Idler Gp will not need the 7X-0567 Hard Washers for installation that were required for the 375-2383 Track Idler Gp .

The new track idler group is adaptable to the following machines:

• 259B3 (S/N: YYZ1-UP)

• 279C (S/N: MBT1-UP)

• 279C2 (S/N: KWB1-UP)

• 289C (S/N: JMP1-UP)

• 289C2 (S/N: RTD1-UP)

• 299C (S/N: JSP1-UP)

• 299D (S/N: HCL1-UP)

• 299D XHP (S/N: NLC1-UP)