315B Excavator Excavator Systems Caterpillar

Disassembly Procedure

Start By:

1. Remove the front idler, the recoil spring and the hydraulic track adjuster. Refer to Disassembly and Assembly, "Front Idler, Recoil Spring and Hydraulic Track Adjuster - Remove and Install".

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Personal injury or death can result from recoil spring force. Recoil spring force, if not relieved, can result in personal injury or death. Relieve spring force before removing threaded retainer, performing repairs on recoil spring housing, or removing recoil spring. See Service Manual for disassembly instructions. Maximum pressure is 20 700 kPa (3,000 psi).

Note: Do not remove the hydraulic track adjuster from the recoil spring assembly.

1. Prior to disassembling and assembling the recoil spring assembly, make sure that Tooling (A) is on a level surface.

2. Thoroughly clean the outside surface of the recoil spring assembly and the hydraulic track adjuster prior to disassembly.

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Illustration 1	g00483426

3. Install Tooling (C) on Tooling (B) , as shown.

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Illustration 2	g00483435

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Illustration 3	g00483437

Note: Two adjustable supports (1) , reaction plate (2) , and movable plate (3) are part of Tooling (A) .

4. Adjust the spacing between reaction plate (2) and movable plate (3) so that the spacing is approximately the same length as the recoil spring assembly. Make sure that two adjustable supports (1) are positioned between the reaction plate and the movable plate, as shown. Level the two supports.

Note: Do not remove the suitable lifting device from the recoil spring assembly until the unit is leveled, centered, and locked in Tooling (A) .

Note: The recoil spring assembly may be installed in Tooling (A) from the end. In this case, reaction plate (2) must be removed. Then reinstall the reaction plate after the recoil spring assembly is in place on two adjustable supports (1) .

5. The combined weight of the recoil spring assembly and the hydraulic track adjuster is approximately 95 kg (210 lb). Fasten a suitable lifting device to the recoil spring assembly. Put the recoil spring assembly in position on two adjustable supports (1) in Tooling (A) . Adjust the two adjustable supports until the centerline of the recoil spring assembly and the centerline of Tooling (A) are aligned.

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Illustration 4	g00370415
The hoist is removed from the recoil spring assembly for photographic purposes.

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Illustration 5	g00370418

6. Put a level gauge (4) on the recoil spring assembly. Reposition the recoil spring assembly until the recoil spring assembly is level. Reposition the recoil spring assembly until the retaining rod and the nut are centered in the hole in reaction plate (2) . Illustration 5 shows that the nut is centered in the hole. Move adjustable supports (1) in order to level the recoil spring assembly. Make the supports higher or lower, as required. After the recoil spring assembly is leveled and centered, install two pins (5) on the back side of reaction plate (2) , as shown. Operate Tooling (B) enough to hold the recoil spring assembly in position between reaction plate (2) and movable plate (3) . Make sure that the recoil spring assembly is level and centered.

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Illustration 6	g00483438

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Personal injury or death can result from recoil spring force. Recoil spring force, if not relieved, can result in personal injury or death. Relieve spring force before removing threaded retainer, performing repairs on recoil spring housing, or removing recoil spring. See Service Manual for disassembly instructions. Maximum pressure is 20 700 kPa (3,000 psi).

7. Close covers (6) on Tooling (A) . Use Tooling (B) to compress the recoil spring assembly slightly.

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Illustration 7	g00370538

8. Remove the two socket head bolts and lock strip (7) from the end of the retaining rod for the recoil spring.

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Illustration 8	g00370539

9. Remove nut (8) with Tooling (D) . Remove the washer. Release the force on the recoil spring assembly.

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Illustration 9	g00370540

10. Open the covers on Tooling (A) . Fasten a suitable lifting device to the recoil spring assembly, and remove the recoil spring assembly from Tooling (A) .

11. Separate the components of the recoil spring assembly. Remove the hydraulic track adjuster (12) , plate (11) , spring (10) , and support (9) .