Field Repair of SystemOne Track with the SystemOne Portable Track Press {4170} Caterpillar

Caterpillar Products

Machines with SystemOne Undercarriage

Introduction

© 2019 Caterpillar All Rights Reserved. This guideline is for the use of Caterpillar dealers only. Unauthorized use of this document or the proprietary processes therein without permission may be violation of intellectual property law. Information contained in this document is considered Caterpillar: Confidential Yellow.

This Undercarriage Reconditioning Bulletin contains the necessary information to allow a dealer to establish a parts reusability program. Reuse and salvage information enables Caterpillar dealers and customers to benefit from cost reductions. Every effort has been made to provide the most current information that is known to Caterpillar. Continuing improvement and advancement of product design might have caused changes to your product which are not included in this publication. This Undercarriage Reconditioning Bulletin must be used with the latest technical information that is available from Caterpillar.

For technical questions when using this document, work with your Dealer Technical Communicator (TC).

To report suspected errors, inaccuracies, or suggestions regarding the document, submit a form for feedback in the Service Information System (SIS Web) interface.

Summary

Illustration 1	g01154906
SystemOne portable track press

The SystemOne Portable Track Presses have been canceled and replaced by the SystemOne Multi-Pitch Track Press. This bulletin is intended for the SystemOne Portable Track Presses that are still in service.

This guideline provides the procedure to replace SystemOne track components on D3 thru D6 sales models.

SystemOne Portable Track Presses are not available for the D8 sales models.

This guideline does not provide any procedures for D8 sales models.

This guideline explains the portable track press. Each machine that has a different pitch will require a different portable track press. For the complete list of tools for your machine, refer to "Necessary Tooling" section of this bulletin.

SystemOne track components are designed not to be repaired or resealed. If a component is damaged, the technician should follow this procedure to replace the damaged component with a recommended service part. The SystemOne design controls important features of the track link assembly such as end play and the sealing of the track joint. The technician must inspect the components that will be installed and the technician should verify that the components are ready for service.

References

Reference: Special Instructions, REHS2350, "Overview of SystemOne Undercarriage"

Reference: Special Instructions, REHS2930, "Overview of SystemOne Undercarriage"

Reference: Special Instructions, REHS2352, "Overview of SystemOne Undercarriage"

Reference: Special Instructions, REHS2718, "Overview of SystemOne Undercarriage"

Reference: Special Instructions, REHS2351, "Overview of SystemOne Undercarriage"

Reference: Special Instructions, REHS1610, "Installation of Direct Conversion Center Tread Idlers"

Reference: Undercarriage Reconditioning Bulletin, REHS2220, "Installation and Removal of SystemOne Clamp Masters"

Reference: See Testing and Adjusting for your machine.

Reference: See Disassembly and Assembly for your machine.

Reference: See Operation and Maintenance Manual for your machine.

Reference: Tool Operating Manual, NEHS0915

Reference: Undercarriage Reconditioning Guide, SEBF8599

Reference: Parts Sales Kit, PECP3003

Reference: Custom Track Service, PEKP9400

Safety

Illustration 2	g02139237

Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs. A person must be alert to potential hazards. This person should also have the necessary training, skills, and tools to perform these functions properly.

This bulletin may contain hazardous steps. Hazardous steps will be identified by warning symbols like the ones.

Warning messages identify a specific, imminent, latent, hazard that has a reasonable probability of resulting in personal injury or death if the warning is ignored.

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Do not attempt to disassemble or assemble this machine until you read and understand the disassembly and assembly instructions. Improper disassembly and assembly procedures could result in injury or death.

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Inspect all threaded components before use. Damaged threads may fail under hydraulic pressure. Broken threads may release flying objects that are propelled with great force. Personal injury or death can occur if struck by flying objects.

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Do not stand near the hydraulic press while the press is in operation. A component that slips or breaks under pressure may fly into the air with great force. Personal injury or death can occur if struck by flying objects.

Canceled Part Numbers and Replaced Part Numbers

This document may not include all canceled part numbers and replaced part numbers. Use NPR on SIS for information about canceled part numbers and replaced part numbers. NPR will provide the current part numbers for replaced parts.

Necessary Tooling

For all of the necessary undercarriage components, refer to Special Instruction, REHS2350, Special Instruction, REHS2717, Special Instruction, REHS2930, Special Instruction, REHS2352, Special Instruction, REHS2718, and Special Instruction, REHS2351.

Procedure to Replace SystemOne Track Components

Illustration 3	g01131754
(1) Offset Track Link Box (2) Outer Track Link (3) Track Link Box (4) Cartridge (5) Inner Track Link

Reference Illustration 3. The components that can be replaced for a SystemOne track are the following components:

• Offset Track link Box

• Outer Track Link

• Track Link Box

The track link box (3) contains 2 cartridges (4) and 2 track links (5) these components are not serviceable.

The offset track link box is for machines that have an odd number of joints in the track link assembly.

The procedure to replace SystemOne track components requires separating the track. The track may be left on the machine to replace components. The SystemOne track can be serviced on the machine. Use blocks to support the track to allow the tooling to be installed on the track.

Identify the components that will be replaced. Refer to "Procedure to Replace SystemOne Track Link Box" section within this bulletin to replace a track link box, an offset track link box, or the outside track link. The track link box includes the cartridge pin and the two inner track links.

Procedure to Replace an Outer Track Link

Illustration 4	g01132630

Follow the procedure below to replace a track link.

1. Remove the track links that will be replaced. Refer to "Separate the SystemOne Track" section within this bulletin.

   Note: If the track link is broken and the hydraulic tool cannot be attached to the track link refer to Undercarriage Reconditioning Bulletin, REHS2412, "Removing SystemOne Track Links".

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   Illustration 5	g01132664

2. Inspect the track link box and cartridges to make sure that the track links and cartridges are reusable. Refer to Undercarriage Reconditioning Bulletin, SEBF8558, "Guideline for Reusable Track Parts".

3. The height of the new track link should be trimmed to match the wear of the link assembly.

   Note: The SystemOne clamp master may be installed onto the track link assembly. The clamp master would replace the standard track link. Refer to Undercarriage Reconditioning Bulletin, REHS2220, "Installation and Removal of SystemOne Clamp Masters" to install the clamp master.

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   Illustration 6	g01132699
   Track link that will be repaired on machines with an elevated sprocket

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   Illustration 7	g01236860
   Track link that will be repaired on machines with an oval track

   1. Measure the height of the track links on the track link assembly that is being repaired.
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      Illustration 8	g01132701

   2. Mark the new track link to reflect the height of the track link assembly that is being repaired.

   3. Use a suitable method to trim the track links. A metal milling machine or an abrasive saw is the preferred method. Use a torch to cut the track links in circumstances that do not allow the preferred method.

4. Install the track links. Refer to "Connect the SystemOne Track" section within this bulletin to install the track links. Follow Steps 3 through Step 32 to install the track links.

5. If more outer links need to be replaced repeat Steps 1 through 4.

Procedure to Replace SystemOne Track Link Box

Follow the procedure below to replace a track link box.

Note: Track link boxes are serviced in two categories: zero percent worn and 70 percent worn. The track link box that is worn zero percent is equal to a new link rail. The track link box that is worn 70 percent has a height that has been machined to match a track link assembly that is worn 70 percent. The track link box that is 70 percent should be used on link assemblies that have 40 percent wear or greater than 40 percent wear.

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NOTICE
The performance of the machine can be affected if a link box that has zero percent wear is used to replace a link assembly that has 40 percent wear or greater than 40 percent wear.

1. Determine the track link boxes that will be replaced and mark the track link box assemblies that will be replaced.
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   Illustration 9	g01132699
   Track link that will be removed on machines with an elevated sprocket

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   Illustration 10	g01236860
   Track link that will be removed on machines with an oval track

2. Separate the track link assembly. Make sure that you separate the track behind the track link box that will be replaced. Refer to "Separate the SystemOne Track" section within this bulletin and follow Step 1 through Step 30 to remove the outside track links.
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   Illustration 11	g01236862

3. Remove the yoke assembly (L).
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   Illustration 12	g01236865

4. Lower the track to the floor.
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   Illustration 13	g01236866

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   Illustration 14	g01131467

5. Use the tractor to index the track in the reverse direction. The track must be indexed to remove the track links that are on the opposite side of the track link box.

6. Remove two additional track shoes (5) and clean the debris from the track.
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   Illustration 15	g01131470

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   Illustration 16	g01236870

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   Illustration 17	g01236869

7. Install yoke (L) or the optional plate for disassembly.

8. Remove track links (2). Refer to "Separate the SystemOne Track" section within this bulletin and follow Step 7 through Step 31.

9. Evaluate the track links to make sure that the track links can be reused. Refer to Undercarriage Reconditioning Bulletin, SEBF8558, "Guideline for Reusable Track Parts".
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   Illustration 18	g01236882

10. Remove yoke (L) from the track link assembly and remove track link box (3).

11. Use the manual 6V-9413 Tool Kit to determine the amount of wear on the track links. Refer to Custom Track Service, PEKP9400 for the percentages of wear.
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    NOTICE
    Do not use a cutting torch to trim a link box. Using a cutting torch to trim a link box can damage the internal components of the cartridge. Heat damage can reduce the service life of the components.

12. Measure the link wear and determine the track link box that should be used for replacement. Refer to Table 7 and Table 8 to determine the recommended replacement part number.

    A 70 percent track link box is offered for link assemblies that have 40 percent or greater wear.

    A track link box is offered for link assemblies that have less than 40 percent wear.

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    Table 7

    Replacement Components
    			Track Link Box
    Sales Model	Pitch	Standard Track Link	Link Box Standard	Link Box Offset	Link Box Standard 70 Percent Worn	Link Box Offset 70 Percent Worn
    D6T D6R D6R2 D6H 963 527	202.81 mm (7.985 inch)	234-9699	351-0955 297-4786 234-9679	351-0956 297-4787 234-9681	351-0963 264-9763	351-0964 264-9768
    D6N D6M D5R D5H 953	190.0 mm (7.48 inch)	235-2501	351-0959 298-2723 235-2509	351-0960 298-2724	339-0264 264-9764	339-0265 264-9769
    D6K2 D6K D5K2 D5K D5G PL61	190.0 mm (7.48 inch)	235-2529	311-6643	N/A	264-9766	N/A
    D5H D5N D5M D5C D5G D4H	171.07 mm (6.735 inch)	235-2514	312-2269	312-2271	264-9765	264-9770
    D4K2 D4K D4G D4C D3K2 D3K D3G D3C	175.41 mm (6.906 inch)	233-5188	235-2560	235-2561	N/A	N/A
    		260-6740	289-3057 260-6744	289-3058 260-6745	264-9767	264-9772

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    Table 8

    Percent of Wear Depth
    Sales Model	Pitch	Zero Percent Worn	40 Percent Worn	70 Percent Worn	100 Percent Worn
    D6T D6R D6R2 D6H 963 527	202.81 mm (7.985 inch)	134.0 mm (5.28 inch)	129.0 mm (5.08 inch)	125.0 mm (4.92 inch)	120.5 mm (4.74 inch)
    D6N D6M D5R D5H 953	190.0 mm (7.48 inch)	121.5 mm (4.78 inch)	117.5 mm (4.63 inch)	114.5 mm (4.51 inch)	110.5 mm (4.35 inch)
    D6K2 D6K D5K2 D5K D5G PL61	190.0 mm (7.48 inch)	108.0 mm (4.25 inch)	104.5 mm (4.11 inch)	101.5 mm (4.00 inch)	98.5 mm (3.88 inch)
    D5H D5N D5M D5C D5G D4H	171.07 mm (6.735 inch)	108.0 mm (4.25 inch)	104.5 mm (4.11 inch)	101.5 mm (4.00 inch)	98.5 mm (3.88 inch)
    D4K2 D4K D4G D4C D3K2 D3K D3G D3C 233-5188 Track Link	175.41 mm (6.906 inch)	91.0 mm (3.58 inch)	88.5 mm (3.48 inch)	86.0 mm (3.39 inch)	83.0 mm (3.27 inch)
    D4K D4G D4C D3K2 D3K D3G D3C 260-6740 Track Link	175.41 mm (6.906 inch)	93.0 mm (3.66 inch)	90.5 mm (3.56 inch)	88.0 mm (3.46 inch)	85.0 mm (3.35 inch)

13. Connect the SystemOne track. Refer to "Connect the SystemOne Track" section within this bulletin to connect the track.

Separate the SystemOne Track

1. Determine the track links that will be replaced and mark the track links that will be replaced.
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   Illustration 19	g01107917
   Track link that will be removed on machines with an elevated sprocket

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   Illustration 20	g01236860
   Track link that will be removed on machines with an oval track

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   Illustration 21	g01106952

2. Position the track links that will be removed between the final drive and the rear idler on machines with an elevated sprocket. Position the track links that will be removed between the front idler and the carrier roller on machines with an oval track. Block the track link assembly with cribbing.
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   Illustration 22	g01106958
   Machines with an elevated sprocket

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   Illustration 23	g01237109
   Machines with an oval track

3. Relieve the tension on the track roller frame. For more information on adjusting the track tension, refer to Operation and Maintenance Manual, "Track - Adjust" for your machine.
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   Illustration 24	g01108465

4. Remove three track shoes at the location of the track links that will be removed. Remove the track shoe that is directly on the track links that will be removed. Remove one track shoe on both sides of the track links that will be removed.

5. Clean the bushings. Clean the track links. Any large amounts of dirt or rust may inhibit the tool from aligning properly.
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   Illustration 25	g01236892

6. Install yoke (L) onto the bushings.
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   Illustration 26	g01236893

7. Verify that the correct contact tool is installed on the hydraulic press. Tooling (S) is used for removing the track links.

   Note: The contact tool that is used during the removal process will contact the end of the collar. The depth of the spot face in the contact tool that is used for removal is 4.78 ± 0.50 mm (0.188 ± 0.020 inch) deep.

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   Illustration 27	g01108046

8. Position hydraulic press (A) on track link (JJ). Use plastic locating pins (D) to secure hydraulic press (A) to track link (JJ).
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   Illustration 28	g01107545

9. Install two bolts (C).
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   Illustration 29	g01236895

10. Insert plate (J) between yoke (L) and hydraulic press (A).

11. Position plate (K) on the front of hydraulic press (A).

12. Install one of four bolts (P) through plate (K), through hydraulic press (A), and into plate (J).
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    Illustration 30	g01236896

13. Install remaining three bolts (P). Check that hydraulic press (A) is firmly in place before you tighten the bolts. The bolts that are located between the hydraulic cylinders should be tightened first.

    Note: Make sure that you tighten bolts (P) evenly. Verify that bolts (P) have full thread engagement with plate (J). There is not a specified torque for bolts (P).

14. After bolts (P) are tightened, remove plastic locating pins (D).
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    To prevent possible damage to your hearing, always wear ear protection when using this tool and/or working around noise generating tools. To avoid eye injury, always wear protective glasses or face shield. Make sure no one can be injured by flying objects or debris when using tools or working on a component.

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    To prevent personal injury or even death from ejected parts or flying objects never remove the upper rigid guard or the lower flexible guard during operation of the portable track press. Never remove either guard when the tool is under pressure.

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    Illustration 31	g01236900

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    Illustration 32	g01236901

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    Illustration 33	g01236902

15. Follow Steps 15a through 15f to install the guard.

    1. Install flexible guard (N) onto upper rigid guard (M).

       Note: Flexible guard (N) has two cutouts on one end. Fasten flexible guard (N) to upper rigid guard (M) on the end that is opposite the cutouts.

    2. Install flexible guard (N) and upper rigid guard (M) over the tooling.

    3. Install hydraulic hoses (B) through the cutouts in flexible guard (N).

    4. Connect hydraulic hoses (B) to hydraulic press (A).

    5. Complete the installation of flexible guard (N) to upper rigid guard (M).

    6. Install track bolts (V). Install track nuts (W).
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    Illustration 34	g01236905

16. Connect hydraulic hose (B) to hydraulic pump (T). Make sure that all connections are clean and tight.

17. Make sure that valves (GG) are in the open position.

18. Turn on hydraulic pump (T). The track link will be pulled off the ends of the cartridge pins. Watch carefully to ensure that the track link is removed evenly.

    Note: The track link must be pulled evenly off the ends of the cartridge pins. Turn off the pump if one end of the track link is offset more than 6.0 mm (0.24 inch) from the other end of the track link. Close the valve on the side of the track link that is farther off the end of the cartridge pin. Restart the pump. When the track link is straight, turn off the pump. Open both valves (GG). Continue the process.

19. Turn off the hydraulic pump when the track link is removed. Allow the oil to return to the reservoir. Springs will force the hydraulic cylinders of the main service tool to return to the start position.

20. Remove track nuts (W). Remove track bolts (V).

21. Remove a portion of flexible guard (N) from upper rigid guard (M). Disconnect hydraulic hoses (B) from hydraulic press (A).

22. Remove flexible shield (N) and upper rigid guard (M) from the tooling.

    Note: Failure to follow Step 23 through Step 26 may result in a component that will fall to the ground.

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    Illustration 35	g01236907

23. Remove three of the four bolts (P). Leave remaining bolt (P) installed. Remaining bolt (P) will keep track link (JJ) and plate (J) from falling onto the ground.

24. Grasp the bottom of plate (J). Continue to remove the remaining bolt (P). Remove plate (J).

25. Grasp the bottom of track link (JJ). Continue to remove the remaining bolt (P). Remove track link (JJ).

26. Grasp the bottom of plate (K). Continue to remove the remaining bolt (P). Remove plate (K).

27. Grasp hydraulic press (A). Remove top support bolts (C). Remove hydraulic press (A).

28. Do not remove yoke (L).
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    Illustration 36	g01237083

29. Move hydraulic press (A) to the opposite side of the track to remove the second track link. Position hydraulic press (A) on track link (KK) that will be removed. Use pins (D) to secure hydraulic press (A) to track link (KK).

30. Repeat Step 9 through Step 28 to remove the second track link.
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    Illustration 37	g01237085

31. If necessary, use a suitable lifting device to support the track.

Connect the SystemOne Track

The SystemOne clamp master may be installed onto the track link assembly. The clamp master would replace the standard track link. Refer to Undercarriage Reconditioning Bulletin, REHS2220, "Installation and Removal of SystemOne Clamp Masters" to install the clamp master.

Perform the following steps to connect the SystemOne track.

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Illustration 38	g01106952

1. Position the ends of the track assembly between the final drive and the rear idler. Block the track assembly with the appropriate cribbing.
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   Illustration 39	g01106958
   Machines with an elevated sprocket

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   Illustration 40	g01237109
   Machines with an oval track

2. Relieve the tension on the track roller frame. For more information on adjusting the track tension, refer to Operation and Maintenance Manual, "Track - Adjust" for your machine.
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   Illustration 41	g01106960

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   Illustration 42	g01109032

3. If the track is new, remove the protective covers from the ends of cartridge pins (DD). If the track is used, make sure that bushings (CC) and the ends of cartridge pins (DD) are free of dirt, paint, and rust. On a new track assembly, the two track links that will connect the ends of the track assembly together will be fastened to the remaining track shoe. Remove the track shoe from the two track links.

4. Check the location of marking (AAA) on the ends of the cartridge pins. The marking should be perpendicular to the rail of the outer track link that will be installed. If the orientation is not correct, use a strap wrench to rotate the cartridge pin to the correct position. See Illustration 42.

5. Install starter link (G) on the cartridge pins.
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   Illustration 43	g01237091

6. Install yoke (L) onto the bushings.

   Note: The yoke is designed to hold the pitch as close as possible. Remove any paint or rust to install the yoke.

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   Illustration 44	g01237094

7. Verify that the correct contact tool is installed onto the hydraulic press. Tooling (R) is used to install the track links.

   Note: The contact tool that is used during the installation process will contact the end of the track pin. The depth of the spot face in the contact tool that is used for installation is 2.00 ± 0.50 mm (0.080 ± 0.020 inch) deep.

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   Illustration 45	g01106966

8. Position hydraulic press (A) on starter link (G). Install plastic locating pins (D).

   Note: Hydraulic press (A) and starter link (G) may fall to the ground. Caution should be taken until Step 9 is performed.

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   Illustration 46	g01237096

9. Install guide bolts (C) through the top plate of hydraulic press (A). Thread bolts (C) into yoke (L) to a depth of approximately 25 mm (1.0 inch).
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   Illustration 47	g01106969

10. Install four studs (E) into plate (H).

    Note: Verify that the studs have been installed into the plate completely. Failure to have full thread engagement may result in damage to the tooling.

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    Illustration 48	g01107799

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    Illustration 49	g01106970

11. Apply recommended Loctite^® C5A^® Copper Anti Seize to the bore of the track link and the cartridge pins. Install track link (FF) onto studs (E).
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    Illustration 50	g01237099

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    Illustration 51	g01237100

12. Install four studs (E) through yoke (L) and through hydraulic press (A).

13. Install plate (K) onto studs (E). Install four nuts (F) onto studs (E).

    Note: Before tightening nuts (F), verify that track link (FF) is centered over the ends of the cartridge pins. Tighten nuts (F) evenly to hold track link (FF) in the proper assembly position. Tighten nuts (F) so that track link (FF) is in the proper location for installation. There is not a specified torque for nuts (F).

14. After nuts (F) have been tightened, remove plastic locating pins (D).
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    NOTICE
    Failure to remove the pins will result in destroying the pins. Do not use any other type of material for a pin.

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    To prevent possible damage to your hearing, always wear ear protection when using this tool and/or working around noise generating tools. To avoid eye injury, always wear protective glasses or face shield. Make sure no one can be injured by flying objects or debris when using tools or working on a component.

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    To prevent personal injury or even death from ejected parts or flying objects never remove the upper rigid guard or the lower flexible guard during operation of the portable track press. Never remove either guard when the tool is under pressure.

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    Illustration 52	g01236900

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    Illustration 53	g01236901

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    Illustration 54	g01236902

15. Follow Steps 15a through 15f to install the guard.

    1. Install flexible guard (N) onto upper rigid guard (M).

       Note: The flexible guard has two cutouts on one end. Fasten flexible guard (N) to upper rigid guard (M) on the end that is opposite the cutouts.

    2. Install flexible guard (N) and upper rigid guard (M) over the hydraulic press.

    3. Install hydraulic hoses (B) through the cutouts in flexible guard (N).

    4. Connect hydraulic hoses (B) to hydraulic press (A).

    5. Complete the installation of flexible guard (N) to upper rigid guard (M).

    6. Install track bolts (V). Install track nuts (W).
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    Illustration 55	g01236905

16. Connect hose assembly (B) to hydraulic pump (T). Make sure that all connections are clean and tight.

17. Make sure that valves (GG) are in the open position.

18. Turn on hydraulic pump (T). The track link will be pulled onto the ends of the cartridge pins. Watch carefully to ensure that the track link is pulled evenly. When the track link is in place, plate (H) will contact the end of the cartridge pins. The gauge on the pump will indicate a sharp rise in pressure.

    Note: The track link must be pulled evenly onto the ends of the cartridge pins. Turn off the pump if one end of the track link is offset more than 6.0 mm (0.24 inch) from the other end of the track link. If one side of the track link has been installed farther, close the valve on the same side. Restart the pump. When the track link is straight, turn off the pump. Open both valves (GG). Continue the process.

    Note: If the cylinders have been retracted during the installation process, inspect the main service tool. Verify that the main service tool is in proper alignment with the cartridge pins. If the main service tool is not in proper alignment, retract the hydraulic cylinders completely. Set up the main service tool properly. If necessary, install pins (D). Tighten nuts (F). If the main service tool is allowed to get out of alignment with the cartridge pins, the hydraulic cylinders will not apply the force correctly. The track link may not be installed correctly. The tooling may become damaged during the misalignment.

19. Turn off the hydraulic pump when the track link is in place. Allow the oil to return to the reservoir. Springs will force the hydraulic cylinders of the main service tool to return to the start position.
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    Illustration 56	g01236901

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    Illustration 57	g01236900

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    Illustration 58	g01236902

20. Remove track nuts (W). Remove track bolts (V).

21. Remove a portion of flexible guard (N) from upper rigid guard (M). Disconnect hydraulic hoses (B) from hydraulic press (A).

22. Remove flexible guard (N) and upper rigid guard (M) from the tooling.
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    Illustration 59	g01237112

23. Install the hydraulic press (A) so that the press is firmly seated on the track. This will reduce the load on guide bolts (C). Reinstall pins (D) for added support.

24. Remove four nuts (F). Remove block (K).

25. Remove four threaded rods (E) and plate (H).

26. Remove bolts (C).

27. Remove hydraulic press (A). Remove starter link (G). Do not remove yoke (L).
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    Illustration 60	g01107544

28. Position hydraulic press (A) on track link (FF). Use pins (D) to secure hydraulic press (A) to track link (FF).

29. Repeat Step 9 through Step 26 to install the other track link.

30. Remove hydraulic press (A).

31. Remove yoke (L).

32. Install the three remaining track shoes. Torque the track shoe bolts to the proper preliminary torque. Refer to Table 9 for the correct preliminary torque values. Then, tighten each bolt by an additional turn of 120 ± 5 degrees.
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    Table 9

    Model	Pitch	Preliminary Torque Specifications
    D6T D6R D6R2 D6H 963 527	202.81 mm (7.985 inch)	500 ± 70 N·m (370.0 ± 50.0 lb ft)
    D6N D6M D5R 953	190.0 mm (7.48 inch)	400 ± 70 N·m (300.0 ± 50.0 lb ft)
    D6K2 D6K D5K2 D5K D5G D4H PL61	190.0 mm (7.48 inch)	200 ± 25 N·m (150.0 ± 20.0 lb ft)
    D5N D5M D5G D4C	171.07 mm (6.735 inch)	145 ± 40 N·m (110.0 ± 30.0 lb ft)
    D4K2 D4K D4G D3K2 D3K D3G D3C	175.41 mm (6.906 inch)	145 ± 40 N·m (110.0 ± 30.0 lb ft)

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    Illustration 61	g01107895

33. Adjust the track tension. For more information on adjusting the track tension, refer to Operation and Maintenance Manual, "Track - Adjust" for your machine.