D11R/N NEW AND IMPROVED MASTER LINKS Caterpillar

D11R/N NEW AND IMPROVED MASTER LINKS [PELJ0165]

UNDERCARRIAGE

TRACK GP

D11R/N NEW AND IMPROVED MASTER LINKS

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Information Release Memo

UC03-05

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AVS?

Undercarriage

April 2003

D11R/N NEW AND IMPROVED MASTER LINKS

These new master links are used on D11R and D11N Track-Type Tractors from the factory and are available in the parts systems. The new geometry of this master link improves cracking resistance (larger radius - see arrows below) and increases service life. The former master links are canceled and replaced by the new master links and are interchangeable with former and new master links.

Adaptability

? The master link?s creative design can be used on all current D11R and non-current D11N machines in the field. The new master links are effective on the following D11R factory built machines.

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Model	Serial Numbers
D11R	7PZ680-Up
	AAF202-Up

? Effective link assembly serial number PD042H01 & Up, for link assembly 215-7494.

Part Number / Wear Chart Information

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	Standard Master Links
Description	Former Part No.	New Part No.
Link Assembly	215-7494	215-7494
RH Pin End Master	6T-8051	229-3525
LH Pin End Master	6T-8052	229-3526
RH Bushing End Master	6T-8053	229-3527
LH Bushing End Master	6T-8054	229-3528

For Link wear chart see the CTS Handbook, 14^th edition, page 109. (Media Number: PEKP9400-02.

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	Taller Master Links 7mm
Description	Former Part No.	New Part No.
Link Assembly	215-7678	215-7678
RH Pin End Master	200-6327	231-4605
LH Pin End Master	200-6328	231-4606
RH Bushing End Master	200-6329	231-4607
LH Bushing End Master	200-6330	231-4608

For Link wear chart for the Taller Links see Attachment I.

Servicing

? See Service Magazine from March 10, 2003, ?New Master Links Improve Reliability and Durability.?

? See IRM UC 03-04, Media No. PELJ0151, ?Updated Link Assembly Identification Code Markings,? for information on the serial numbers of link assemblies.