BAR AS-GRIZZLY 2719647 - Caterpillar

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Typical indications of the bushing groove gauge.
The track seal fits in the link counterbore and seals against the bushing end. A groove can be formed in the end of the bushing. If the groove is too large, the track seal may not effectively seal against the damaged bushing end. Gauges for end grooving on the bushing are available to determine the reusability of grooved bushings. The gauge slips over the bushing ends. See Illustration 31. Rotate the gauge around the end of the bushing. Place the track bushing groove gauge on the bushing and determine if the seal groove has progressed enough that the groove is visible. If the seal groove is visible, the bushing should not be reused. See Illustration 32.Galling in the ID of the Bushing
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Galled bushing
Galling on the ID of the bushing occurs because of the lack of lubrication. See Illustration 33. Galling on the pin and the bushing usually occurs simultaneously. Galled bushings can occasionally be reused. Pins and bushings for the D11 should be evaluated for galling.Use the bushing again if the galling on the ID of the bushing does not exceed 12.7 mm (0.50 inch) laterally or more than 90 degrees around.Do not use the bushing again if the galling on the ID of the bushing exceeds 12.7 mm (0.50 inch) laterally or more than 90 degrees around.Metal Transfer on Bushings
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Bushing with metal transfer on ends
Use the bushing again.The metal transfer on the bushing end occurs when there is slight movement of the bushing in the link bore. The metal that is removed from the link is then deposited on the harder surface of the bushing. A pin that has any metal transfer may not be used, because the pin to the pin bore must seal oil. Transferred metal on a bushing can be reused because the bushing to the bushing bore does not seal oil. See Illustration 34.Thrust Rings
Damaged Thrust Rings
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Cracked thrust ring
Do not use the thrust ring again.The thrust ring allows the proper amount of compression of the track seal in the assembled joint. Thrust rings with any crack cannot be used again. See Illustration 35. Do not reuse thrust rings from dry joints for a wet turn.
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Severely chipped thrust ring
Do not use the thrust ring again.A heavily chipped thrust ring cannot be used again. See Illustration 36.Worn Thrust Rings
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Thrust ring with minor damage
Use the thrust ring again if the grooves for lubrication can be seen.If the grooves for lubrication can be seen on both sides, a thrust ring with corrosion, grooves, or small chips on the faces can be used again. See Illustration 37. Do not reuse the thrust ring if the thrust ring is galled 360 degrees on either side.SystemOne
The SystemOne track components and the previous conventional track components are different. Many of the concerns for reusability from the previous conventional undercarriage components are no longer an issue.For any concerns with cracks in the track links, refer to the "Cracking in