2014/01/07 Caterpillar

Track-Type Tractor:

D6H DS PS LGP (S/N: 5HF1-UP)

D6H PS LGP (S/N: 4LG1-UP)

D6HSeries II (S/N: 4RC1-UP; 6FC1-UP; 8FC1-UP; 1KD1-UP; 2KD1-UP; 3ED1-UP; 3ZF1-UP; 4YF1-UP; 5HF1-UP; 6CF1-UP; 2TG1-UP; 3YG1-UP; 4GG1-UP; 4LG1-UP; 1FJ1-UP; 8ZJ1-UP; 9KJ1-UP; 2DK1-UP; 5KK1-UP; 6CK1-UP; 8KK1-UP; 8SK1-UP; 9LK1-UP; 9RK1-UP; 1YL1-UP; 2BL1-UP; 2TL1-UP)

D6H (S/N: 8KB1-UP; 7PC1-UP; 8YC1-UP; 7ED1-UP; 3YJ1-UP; 6JJ1-UP; 7ZK1-UP)

D6R (S/N: 2HM1-UP; 4FM1-UP; 8TM1-UP; 9BM1-UP; 2YN1-UP; 3ZN1-UP; 4HN1-UP; 4MN1-UP; 5LN1-UP; 6JN1-UP; 7KN1-UP; 8LN1-UP; 8XN1-UP; 9MN1-UP; 9PN1-UP; 4JR1-UP; 4TR1-UP; 4WR1-UP; 5PR1-UP; 5RR1-UP; 6FR1-UP; 6GR1-UP; 6HR1-UP; 6MR1-UP; 7AR1-UP; 7DR1-UP; 7GR1-UP; 9ZS1-UP; 1RW1-UP)

D6RSeries II (S/N: BNC1-UP; AFD1-UP; CAD1-UP; BLE1-UP; BRE1-UP; DAE1-UP; ACJ1-UP; BMJ1-UP; BRJ1-UP; BMK1-UP; BNL1-UP; AEM1-UP; AFM1-UP; AGM1-UP; BPM1-UP; AEP1-UP; BPP1-UP; BPS1-UP; BLT1-UP; FDT1-UP; AAX1-UP; BMY1-UP; BPZ1-UP; BRZ1-UP)

D6RSeries III (S/N: GJB1-UP; WCB1-UP; HDC1-UP; RFC1-UP; TBC1-UP; HCD1-UP; HKE1-UP; WRG1-UP; MTJ1-UP; DMK1-UP; JEK1-UP; EXL1-UP; DLM1-UP; LFM1-UP; LGP1-UP; DPS1-UP; GMT1-UP; MRT1-UP; EXW1-UP; JDL1-UP)

D6T (S/N: JHB1-UP; KSB1-UP; ZEB1-UP; ZJB1-UP; JZC1-UP; SMC1-UP; DTD1-UP; JWD1-UP; LBD1-UP; LAE1-UP; WCG1-UP; WFH1-UP; EJJ1-UP; LKJ1-UP; SLJ1-UP; GMK1-UP; RRK1-UP; KJL1-UP; SKL1-UP; TSM1-UP; WLM1-UP; GCT1-UP; JRW1-UP; RCW1-UP; RLW1-UP; LAY1-UP; PEZ1-UP; PLR1-UP; S6Y1-UP; S6X1-UP; S6T1-UP; SNK1-UP)

The track link for D6T/R/H size Heavy Duty Undercarriage has been improved.

Illustration 1	g03459016
(1) Typical fatigue crack near the bushing bore

Illustration 2	g03459017
(2) Typical rail spalling

The new design has more steel in the link windows and in the link strut to reduce stresses that lead to cracking. The new design also has a larger radius at each end of the rail to help reduce roller impacts that may lead to rail spalling. See Illustration 3.

Illustration 3	g03453545
New Link (top) Old Link (bottom) (3) Thicker link strut (4) Added steel in the link windows (5) Larger radius at rail ends

The new link is a direct replacement for the old, and uses the same track pin, seal, bushing, thrust ring, track shoe, bolt, and nut as the old. The new link also uses the same track press tooling as the old.

The new link has the same link rail height and wear characteristics as the old link, and therefore uses the same Custom Track Service (CTS) wear charts.

For field repairs of existing track, it is acceptable to mix old and new link part numbers in a track.

The new links will begin to be phased into Service Parts, as well as East Peoria, Grenoble, and Brazil factory tractor assembly throughout the remainder of 2013.