D9 IMPROVED THRUST RING DESIGN Caterpillar

D9 IMPROVED THRUST RING DESIGN

Summary

An improved D9 Thrust Ring is now available through the parts system. It is also in the production of new track link assemblies.

Affected Models

D9T (S/N: RJS1-Up), D9R (S/N: ABK1-UP; ACL1-UP; 7TL1-Up; 8BL1-Up; WDM1-Up), D9N (S/N: 1JD1-Up; 6XJ1-Up), D9L (S/N: 14Y1-Up), 589 (S/N: 31Z1-Up)

Benefits 

Several changes have been implemented to reduce link counterbore wear.

?        Deeper oil grooves to improve oil flow.

?        Oil grooves have an improved radius blend onto face of the ring.

?        Oil grooves are offset 90 degrees from one face to the other

?        Material has additional heat treatment to reduce the hardness

?        Ring is oil dipped to provide lubrication at initial assembly

Additional Details

An improved thrust ring is now used in the track link assemblies of the D9T Track-Type Tractor. Improvements in the thrust ring are also available in the service replacement track link assemblies for the D9T, D9R, D9L, and D9N Track-Type Tractors as well as for the 589 Pipelayers.

Table 1

The new 352-9707 Thrust Ring is a direct replacement for the former 9W-2755 Thrust Ring in the track link assemblies that are listed in Table 2. The new 352-9707 Thrust ring is oil dipped to provide additional lubrication at initial assembly.

The new 352-9708 Ring As is available for parts service. The 352-9708 Ring As has a plastic facing that is pre-applied to both sides of the thrust ring. The thrust ring that is used in the ring assembly is not oil dipped.

Table 2

Part numbers for PPR and Non-PPR Track Link assemblies will remain the same. For all service replacement track link assemblies that are listed in Table 2, the improved thrust ring is effective with track link serial number PM090-Up.

Table 3

The improved thrust ring is adaptable to and effective with the machines that are listed in Table 3.

Recommended Service Practices (Improved Thrust Rings)

For the track link assemblies built with the new thrust rings, rebuild the track link assembly with the new 352-9707 Thrust Rings or the new 352-9708 Ring As. If the dealer chooses to install the optional plastic facing manually to the ring, then the oil dipped 352-9707 Thrust Ring can be rinsed with Stanisol and air-dried. Rinsing the thrust ring with Stanisol and then air drying the thrust ring will allow the plastic-facing to adhere to the thrust ring.

Recommended Service Practices (Former Thrust Rings)

For the track link assemblies built with the former thrust rings, reuse the former thrust rings if there is no wear in the counterbore of the link. If there is wear in the counterbore of the link, then replace the former 9W-2755 Thrust Rings with the new 352-9707 Thrust Rings or 352-9708 Ring As. Refer to Undercarriage Reconditioning Bulletin, SEBF8558, ?Guideline for Reusable Track Parts? in order to determine additional parts that may need to be replaced.

Contact Information:
Global Dealer Solutions Network
Parts Technical Support Team
Toll Free - North America:  1-877-228-2420
International: +1-309-266-4421
Email:  Tech_Support@Cat.com