2014/08/18 Improved Radiator Support Pin Assemblies and Support Bar Assemblies Are Now Used On D11T Track-Type Tractors Equipped With Copper Tube Grommeted Radiators {1353} Caterpillar

Description of Change: Improved radiator support pin assemblies and support bar assemblies are now used on D11T Track-Type Tractors equipped with copper tube grommeted radiators. The improved radiator support pin assemblies have a larger outside diameter that tightens the press fit between the support pin and the isolation mount. The improved radiator support pin assemblies also have a 25.4 mm (1 inch) thick plate welded to the pin. In addition to the support pin assembly improvements, the improved support bar assembly increases the clearance between the support bar and the radiator fan. These improvements will decrease the likelihood of the fan contacting the radiator.

Adaptable To: These improvements are effective with the following machines if equipped with a Mesabi radiator:

• D11T (S/N: JEL334-UP; JNS135-UP; AMA501-UP; MDG164-UP)

• D11T (S/N: JEL1-333; JNS1-134; AMA1-500; MDG1-163)

Illustration 1	g03712353
Engine side of the radiator shown (1) Support pin as (upper) (3) Bar as (mid core support) (2) Support pin as (lower) (A) 25.4 mm (1 inch) Support plate (B) Outside diameter

Illustration 2	g03712509
(A) 25.4 mm (1 inch) support plate (6) Isolation mount (C) Dimension 25.4 mm (1 inch) for new support pin assemblies. Dimension (C) may be 19 mm (0.75 inch) for existing support pin assemblies. See the Notes listed below. (D) Contact

Note: If dimension (C) is 25.4 mm (1 inch) the rubber surface of isolation mount (6) closest to 25.4 mm (1 inch) support plate (A) should just make contact (D) with support plate (A) .

Note: If dimension (C) is 19 mm (0.75 inch) the rubber surface of isolation mount (6) closest to the 19 mm (0.75 inch) plate should NOT make contact (D) with the support plate. There should be a 6.5 mm (0.26 inch) gap between the rubber surface of isolation mount (6) and the plate.

Rework Procedure

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Personal injury can result from flame cutting or welding on painted areas. The effect of gasses from burned paint is a hazard to the person doing the cutting or welding. Do not flame cut or weld on painted areas.

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Personal injury or death can result from fumes, gases and ultraviolet rays from the weld arc. Welding can cause fumes, burn skin and produce ultraviolet rays. Keep your head out of the fumes. Use ventilation, exhaust at the arc, or both, to keep fumes and gases from your breathing area. Wear eye, ear and body protection before working. Protect yourself and others; read and understand this warning. Fumes and gases can be dangerous to your health. Ultraviolet rays from the weld arc can injure eyes and burn skin. Electric shock can cause death. Read and understand the manufacturer's instructions and your employer's safety practices. Do not touch live electrical parts. See "American National Standard Z49.1, Safety in Welding and Cutting" published by the American Welding Society. American Welding Society 2501 N.W. 7th Street Miami, Florida 33125 See "OSHA Safety and Health Standards, 29 CFR 1910", available from U.S. Department of Labor. U.S. Department of Labor Washington, D.C. 20210

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Illustration 3	g03712844

1. Remove existing radiator upper and lower support pin assemblies (E) by removing welds (F) .

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Illustration 4	g03712858

2. Locate upper support pin assemblies (1) and lower support pin assemblies (3) using pilot holes in radiator frame (G) and pilot shafts (H) on upper support pin assembly (1) and lower support pin assembly (3) .

   Note: Upper support pin assembly (1) will have the pin support shaft closest to the engine.

3. Replace the weld removed in Step 1 for both upper support pin assemblies (1) and both lower support pin assemblies (3) to radiator frame (J) .

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Illustration 5	g03713475
(A) 25.4 mm (1 inch) support plate (6) Isolation mount (C) Dimension 25.4 mm (1 inch) for new support pin assemblies. Dimension (C) may be 19 mm (0.75 inch) for existing support pin assemblies. See the Notes listed below. (C) Dimension 25.4 mm (1 inch) for new (D) Contact

4. Install isolation mount (6) until the inboard rubber surface of isolation mount (6) contacts (D) the mating surface of 25.4 mm (1 inch) support plate (A) .

   Note: If dimension (C) is 19 mm (0.75 inch) the rubber surface of isolation mount (6) closest to the 19 mm (0.75 inch) plate should NOT make contact (D) with the support plate. There should be a 6.5 mm (0.26 inch) gap between the rubber surface of isolation mount (6) and the plate.

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Illustration 6	g03713496

5. Remove the 362-7806 Support Bar from the fan side of the 357-9977 Radiator Gp. Install support bar (3) using four bolts (4) and four washers (5) .