Type "A" Disassembly Procedure (Hex Nut)
| Required Tools | |||
|---|---|---|---|
| Tool | Part Number | Part Description | Qty |
| A | 4C-9540 | Recoil Spring Bench | 1 |
| B | 146-2457 | Hydraulic Power Supply Gp | 1 |
| 223-3506 | Hydraulic Cylinder and Lines Gp | 1 | |
| C | 8S-9971 | Adapter | 1 |
| D | 4C-4469 | Socket | 1 |
Start By:
- Remove the front idler, the recoil spring assembly and the hydraulic track adjuster. Refer to Disassembly and Assembly, "Front Idler and Recoil Spring - Remove " in this manual.
- Prior to disassembling the recoil spring assembly, make sure that Tooling (A) is on a level surface.
 |
The spring of the recoil spring assembly is compressed under several tons of force. Do not attempt to compress or release the tension of the spring with the nut on the end of the retaining rod. Damaged threads on the retaining rod or nut can cause the assembly to come apart with force, resulting in injury or death. |
 |
Note: Do not remove the hydraulic track adjuster from the recoil spring assembly.
- Thoroughly clean the outside surface of the recoil spring assembly and the track adjuster prior to disassembly.
- Install Tooling (C) on Tooling (B) , as shown.
 | |
| Illustration 1 | g00483426 |
- 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. Also, make sure that two adjustable supports (1) are positioned between the reaction plate and the movable plate, as shown. Level the two supports.
 | |
| Illustration 2 | g00561928 |
The free length of the recoil spring is 630.9 mm (24.84 inch). | |
Note: Two adjustable supports (1) , reaction plate (2) and movable plate (3) are part of Tooling (A) .
- The weight of the recoil spring assembly is approximately 120 kg (265 lb).
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) .
| NOTICE |
|---|
Do not remove the hoist from the recoil spring assembly until the unit is leveled, centered and locked in the specified tooling. |
- Fasten a hoist to the recoil spring assembly and the hydraulic track adjuster. Put the recoil spring assembly in position on two adjustable supports (1) in Tooling (A) .
 | |
| Illustration 3 | g00561991 |
- Adjust the two adjustable supports in order to align the centerline of the recoil spring assembly with the centerline of Tooling (A) .
- Put a level gauge (4) on the recoil spring assembly.
 | |
| Illustration 4 | g00370415 |
The hoist has been removed from the recoil spring assembly in order to provide a better illustration of level gauge (4) . | |
 | |
| Illustration 5 | g00498781 |
- Reposition the recoil spring assembly until the recoil spring assembly is level. Reposition the retaining rod and nut (6) so both are centered in the hole in reaction plate (2) , as shown.
- The recoil spring assembly is leveled by moving adjustable supports (1) higher or lower.
- 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.
- Close covers (7) on Tooling (A) . Use Tooling (B) to compress the recoil spring assembly slightly.
 | |
| Illustration 6 | g00498784 |
|
Several tons of force are required to compress the recoil spring during assembly. Do not compress the spring assembly until the covers on the tooling have been closed. It is possible for the recoil spring to twist under load and come out of the tooling resulting in injury or death. |
|
- Through the opening in the end of Tooling (A) , remove the two bolts and lock strip (8) .
 | |
| Illustration 7 | g00711947 |
- Remove nut (6) with Tooling (D) .
- Remove the washer that is behind nut (6) . Release the force on the recoil spring assembly.
- Open covers (7) on Tooling (A) . Fasten a hoist to the recoil spring assembly, and remove the recoil spring assembly from Tooling (A) .
- Separate the components of the recoil spring assembly. Remove track adjuster (12) , plate (11) , spring (10) , and support (9) .
 | |
| Illustration 8 | g00710664 |
- For the disassembly of the hydraulic track adjuster (12) , refer to Disassembly and Assembly, "Track Adjuster - Disassemble" in this manual.
Type "B" Disassembly Procedure (Cylindrical Nut)
| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| (A) | 4C-9540 | Recoil Spring Bench | 1 |
| (B) | 146-2457 | Hydraulic Power Supply Gp | 1 |
| 223-3506 | Hydraulic Cylinder and Lines Gp | 1 | |
| (C) | 8S-9971 | Adapter | 1 |
| (D) | 142-4212 | Spanner Socket | 1 |
Start By:
- Remove the front idler, the recoil spring assembly, and the hydraulic track adjuster as a unit. Refer to Disassembly and Assembly, "Front Idler, Recoil Spring and Hydraulic Track Adjuster - Remove and Install" in this manual.
- Prior to disassembling the recoil spring assembly, make sure that Tooling (A) is on a level surface.
|
The spring of the recoil spring assembly is compressed under several tons of force. Do not attempt to compress or release the tension of the spring with the nut on the end of the retaining rod. Damaged threads on the retaining rod or nut can cause the assembly to come apart with force, resulting in injury or death. |
|
- Thoroughly clean the outside surface of the recoil spring assembly prior to disassembly.
- Install Tooling (C) on Tooling (B) , as shown.
| | |
| Illustration 9 | g00483426 |
- 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. Also, make sure that two adjustable supports (1) are positioned between the reaction plate and the movable plate, as shown. Level the two supports.
 | |
| Illustration 10 | g00494710 |
 | |
| Illustration 11 | g00483437 |
Note: Two adjustable supports (1) , reaction plate (2) and movable plate (3) are part of Tooling (A) .
- The combined weight of the recoil spring assembly and the hydraulic track adjuster is approximately 120 kg (265 lb).
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) .
| NOTICE |
|---|
Do not remove the hoist from the recoil spring assembly until the unit is leveled, centered and locked in the specified tooling. |
- Fasten a hoist 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 in order to align the centerline of the recoil spring assembly with the centerline of Tooling (A) .
- Put a level gauge (4) on the recoil spring assembly.
 | |
| Illustration 12 | g00498760 |
The hoist has been removed from the recoil spring assembly in order to provide a better illustration of level gauge (4) . | |
- Reposition the recoil spring assembly until the recoil spring assembly is level. Reposition the retaining rod and nut (6) so both are centered in the hole in reaction plate (2) , as shown.
 | |
| Illustration 13 | g00370418 |
- The recoil spring assembly is leveled by moving adjustable supports (1) higher or lower. 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.
- Close covers (7) on Tooling (A) . Use Tooling (B) to compress the recoil spring assembly slightly.
| | |
| Illustration 14 | g00498784 |
|
Several tons of force are required to compress the recoil spring during assembly. Do not compress the spring assembly until the covers on the tooling have been closed. It is possible for the recoil spring to twist under load and come out of the tooling resulting in injury or death. |
|
- Through the opening in the end of Tooling (A) , remove the two socket head bolts and lock strip (8) .
 | |
| Illustration 15 | g00858860 |
- Remove nut (6) with Tooling (D) .
- Remove the washer that is behind nut (6) . Release the force on the recoil spring assembly.
- Open the covers on Tooling (A) . Fasten a hoist to the recoil spring assembly, and remove the recoil spring assembly from Tooling (A) .
- Separate the components of the recoil spring assembly. Remove hydraulic track adjuster (12) , plate (11) , spring (10) , and support (9) .
| | |
| Illustration 16 | g00710664 |
- Remove the hydraulic track adjuster from cylinder (12) . Refer to Disassembly and Assembly, "Track Adjuster - Disassemble" in this manual.