NEW D6H/R/T SYSTEMONE RELIEVED TREAD IDLER (RTI) Caterpillar

NEW D6H/R/T SYSTEMONE RELIEVED TREAD IDLER (RTI)

Usage:

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Information Release Memo

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CAT?

Undercarriage

October 2010

NEW D6H/R/T SYSTEMONE RELIEVED TREAD IDLER (RTI)

An improved Relieved Tread Idler is now available through the parts system. It is also being used on all current production tractors.

Relieved Tread Idlers are available for the following specific machine models:

Elevated Sprocket Tractors D6H/R/T

Arrows show where the contact/wear points are

Benefits

Relieved Tread Idler:
? RTI eliminates idler and link contact near the bushing seal; with the former CTI, this contact often resulted in dry joints due to thrust bias wear.
? Contact surfaces of the RTI and link are both hardened steel, which decreases thrust wear rate.
? Relieved OD of the RTI reduces material packing pressure near bushing seals.

The new Relieved Tread Idlers will cancel replace the current Center Tread Idlers (CTI) currently used on D6T machines.

See Special Instructions REHS4393 for information regarding modification of idler guards/scrapers on existing machines built prior to April 2010.

Note: Relieved Tread Idlers are not recommended for use with Double Flange Rollers.

Part Numbers

Refer to Attachment I for new part number information.

Attachment I

D6H/R/T SystemOne Relieved Tread Idler

STD, XL, XW, IG, LGP

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(Per Machine)	QUANTITY	PART NUMBER
Group	4	323-1170
Components of Group
Idler Assembly	1	323-1171
Bearing *	2	9P-2245
Shaft	1	149-2494
Collar	2	107-3945
Retainer	2	149-2495
Thrust Washer **	2	1067691/">106-7691
Bolt	24	1T-0765
Washer	24	5M-2894
Seal -- Duo-Cone Group (Symmetric Seal)	2	162-7862
Toric Ring *	2	162-2166
Seal -- Retainer	2	2H-3928
Seal -- Collar	2	7J-2036
Stopper	1	9G-5664
Plug	1	6Y-0473

* Component of preceding assembly or group; quantity shown is quantity per assembly or group.

** Use (1) 9W2423 Thrust Washer and (4) 2H1190 Dowels to repair former 9G9350 Retainer Assembly.
DO NOT DRILL AND DOWEL NEW 1067691 Thrust Washer. See Special Instruction SEHS8515.

D6H/R/T SystemOne Relieved Tread Idler

Landfill/Special Application

STD, XL, XW, IG, LGP

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(Per Machine)	QUANTITY	PART NUMBER
Group	4	351-0886
Components of Group
Idler Assembly & Bearing	1	323-1171
Bearing *	2	9P-2245
Shaft	1	149-2494
Collar	2	167-1951
Ring	2	170-0792
Seal	2	167-1952
Retainer	2	167-1950
Thrust Washer **	2	1067691/">106-7691
Bolt	24	9B-7237
Washer	24	8T-4896
Seal -- Duo-Cone Group (Symmetric Seal)	2	162-7862
Toric Ring *	2	162-2166
Seal -- Retainer	2	2H-3928
Seal -- Collar	2	7J-2036
Stopper	1	9G-5664
Plug	1	6Y-0473

* Component of preceding assembly or group; quantity shown is quantity per assembly or group.

** Use (1) 9W2423 Thrust Washer and (4) 2H1190 Dowels to repair former 9G9350 Retainer Assembly.
DO NOT DRILL AND DOWEL NEW 1067691 Thrust Washer. See Special Instruction SEHS8515.

Custom Track Service (CTS)

Refer to Attachment II for CTS wear chart data.

Attachment II

D6T Relieved Tread Idler Wear Chart

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Depth Gauge		%Worn
Depth Gauge
In	mm
2.12	54.0	0
2.10	53.5	4
2.08	53.0	8
2.06	52.5	12
2.04	52.0	16
2.02	51.5	20
2.00	51.0	24
1.98	50.5	28
1.96	50.0	32
1.94	49.5	36
1.92	49.0	40
1.90	48.5	44
1.88	48.0	48
1.86	47.0	52
1.84	46.5	55
1.82	46.0	58
1.80	45.5	61
1.78	45.0	64
1.76	44.5	67
1.74	44.0	70
1.72	43.5	73
1.70	43.0	76
1.68	42.5	79
1.66	42.0	82
1.64	41.5	85
1.62	41.0	88
1.60	40.5	91
1.58	40.0	94
1.56	39.5	97
1.54	39.0	100
1.52	38.5	103
1.50	38.0	106
1.48	37.5	109
1.46	37.0	112
1.44	36.5	115
1.42	36.0	118
1.40	35.5	121

Relieved Tread Idler Measurements (No Ultrasonic)

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Contact Information

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

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