NEW D11R TRACK IDLER GROUP WITH IMPROVED RETAINER BOLT RETENTION Caterpillar

NEW D11R TRACK IDLER GROUP WITH IMPROVED RETAINER BOLT RETENTION

With the introduction of the idler groups with symmetric Duo-Cone^? seals (ref IRM UC98-16) on the D11R, retainer bolt retention was a concern in some application.  New idler groups (with a stronger retainer assembly, longer retainer bolts, and deeper counterbore in the idler assembly) are now available in the parts system.  The former idler groups are being canceled and replaced by the new idler groups.  With the new idler design the current track idler shaft, collars, and Duo-cone seal groups are being used.  The former idler assembly is being canceled and replaced by a new idler assembly, new retainer assembly and longer retainer bolts.

Features/Benefits

Part Numbers 

Refer to Attachment I for former and new group and consist part number information.

Adaptability

The new idler groups are directly interchangeable at the group level with the former idler groups and can be used on earlier built ?R and N? series machines.  The new idler groups were effective 4^th quarter 2000 on factory built machines with the following serial numbers:

Servicing

The former idler assembly is being serviced by a new idler assembly, new retainer assemblies and longer retainer bolts.  CAUTION!  Longer retainer bolts are required with the new idler assembly.  For additional information refer to Service Magazine dated, February 12, 2001.  Refer to the following Special Instructions as guidance for assembly, installations, tools and specification charts:

Mounting the new idler groups to the track roller frame is the same as with the former idler groups.

Custom Track Service
When performing Custom Track Service (CTS), refer to wear charts found in the CTS Handbook, 14^th Edition (Media Number PEK9400-02).

TCRobertson

Undercarriage Marketing Division

Parts and Service Marketing

CV4111 ? (309) 675-7879

E-mail:  Robertson_Thomas@AVS.com