Procedure for Servicing Master Joints for (320 through 336) Hydraulic Excavators. {4169, 4171} Caterpillar


Procedure for Servicing Master Joints for (320 through 336) Hydraulic Excavators. {4169, 4171}

Usage:

TK711 101
Caterpillar Products
Machines with Greased Lubricated Track (GLT)

Introduction

Table 1
Revision  Summary of Changes in SEBF8623 
08  Added serial number prefixes for New Product Introduction. 
07  Updated tabled and added serial number prefixes for New Product Introduction. 
06  Added serial number prefixes for New Product Introduction. 
05  Added sales model MD6290 for New Product Introduction. 

© 2018 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 questions when using this document, work with your Dealer Technical Communicator (TC).

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

Summary

This guideline provides the procedure for servicing the master joints for 320 through 336 Hydraulic Excavators.

  • Do not perform any procedure in this guideline until you understand the information that is provided within this guideline.

  • Do not perform any procedures in this guideline until all the information within the “References” “Safety” sections has been read.

Note: Certain machine configurations and underfoot conditions may cause the slip fit master joint to fail prematurely. Consult with your Product Support Specialist prior to converting to slip fit master joint.

References

Reference: Undercarriage Reconditioning Guide, SEBF8599

Reference: Undercarriage Reconditioning Bulletin, SEBF8558, "Guideline for Reusable Track Parts"

Reference: Undercarriage Reconditioning Bulletin, SEBF8566, "Caterpillar Track Data Charts"

Reference: Servicing Handbook, PEKP9400, "Caterpillar Track Service Handbook"

Reference: Parts Sales Kit, PECP3003

Reference: Dealer Service Tool Catalog, NENG2500

Safety



Illustration 1g02139237

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. A safety alert symbol like the ones below is used to identify a hazard.

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.

------ WARNING! ------

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.


------ WARNING! ------

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.


------ WARNING! ------

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.


------ WARNING! ------

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

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.

Tooling and Equipment

Table 2
Required Tools
-
Field Press 
Required Tools
-
Shop Press 
Reference Table 3 per Sales Model
Reference Table 4 per Sales Model
Reference Table 5 per Sales Model
Reference Table 6 per Sales Model 
Starter Pin
Pin Pusher 
Reference Table 3 per Sales Model
Reference Table 4 per Sales Model
Reference Table 5 per Sales Model
Reference Table 6 per Sales Model 
Bushing Tool
Saddle 
Quantity  Part Number  Description  Quantity  Part Number  Description 
Loctite® C5-A®  Copper Based Anti-Seize Compound 
260-9412  Chain Assembly 
5P-6214  Track Block Assembly 
5P-9903  Grease Cartridge 
360-6955  Hydraulic Press 
194-7582  Pneumatic Wrench Gp 
194-7586  Pneumatic Wrench Gp 
100 Ton Press  5P-2379  Track Press Tool Group 
8S-7172 Double Acting Cylinder 
8S-9903 Track Press Rollover Group 

Required Parts

Table 3
Required Parts for Slip Fit Master
-
Sales Models 320, 321, and 323 
Required Parts for Press Fit Master
-
Sales Models 320, 321, and 323 
Quantity  Part Number  Description  Quantity  Part Number  Description 
8E-8585  RH Link 
8E-8586  LH Link 
9W-3137  RH Link 
9W-3138  LH Link 
6Y-8185  Track Pin  6Y-8185  Track Pin 
188-3064  Track Pin 
095-0863  Cotter Pin 
158-4381  Track Seal  158-4381  Track Seal 
190-3524  Track Bushing  190-3524  Track Bushing 
5F-9447  Pilot Pin  5F-9447  Pilot Pin 
9U-7773  Saddle  9U-7773  Saddle 
9U-7662  Bushing Body  9U-7662  Bushing Body 
9U-7656  Bushing Base  9U-7656  Bushing Base 
9U-7647
-or-
4C-6988 
Bushing Plunger  9U-7647
-or-
4C-6988 
Bushing Plunger 
Shim Under Plunger  1.0 mm (0.04 inch)  Shim Under Plunger  1.0 mm (0.04 inch) 
9F-5975  Socket Head Screw  9F-5975  Socket Head Screw 
1B-2578  Jam Nut  1B-2578  Jam Nut 
248-2069  Spring  248-2069  Spring 
5B-0448  Set Screw  5B-0448  Set Screw 

Table 4
Required Parts for Slip Fit Master
-
Sales Models 322, 324, and 326 
Required Parts for Press Fit Master
-
Sales Models 322, 324, and 326 
Quantity  Part Number  Description  Quantity  Part Number  Description 
8E-8585  RH Link 
8E-8586  LH Link 
353-9246  RH Link 
353-9247  LH Link 
340-8907  Track Pin  340-8907  Track Pin 
188-3064  Track Pin 
095-0863  Cotter Pin 
158-4381  Track Seal  158-4381  Track Seal 
190-3524  Track Bushing  190-3524  Track Bushing 
5F-9447  Pilot Pin  5F-9447  Pilot Pin 
9U-7773  Saddle  9U-7773  Saddle 
9U-7662  Bushing Body  9U-7662  Bushing Body 
9U-7656  Bushing Base  9U-7656  Bushing Base 
9U-7647
-or-
4C-6988 
Bushing Plunger  9U-7647
-or-
4C-6988 
Bushing Plunger 
Shim Under Plunger  1.0 mm (0.04 inch)  Shim Under Plunger  1.0 mm (0.04 inch) 
9F-5975  Socket Head Screw  9F-5975  Socket Head Screw 
1B-2578  Jam Nut  1B-2578  Jam Nut 
248-2069  Spring  248-2069  Spring 
5B-0448  Set Screw  5B-0448  Set Screw 

Table 5
Required Parts for Slip Fit Master
-
Sales Models 325 and 329 
Required Parts for Press Fit Master
-
Sales Models 325 and 329 
Quantity  Part Number  Description  Quantity  Part Number  Description 
115-1853  RH Link 
115-1854  LH Link 
6Y-1607  RH Link 
6Y-1608  LH Link 
6Y-0850  Track Pin  6Y-0850  Track Pin 
188-3065  Track Pin 
095-7944  Cotter Pin 
179-3427  Track Seal 
201-0826  Track Bushing 
158-4381  Track Seal 
201-0826  Track Bushing 
5F-9447  Pilot Pin  5F-9447  Pilot Pin 
9U-7772  Saddle  9U-7772  Saddle 
9U-7663  Bushing Body  9U-7662  Bushing Body 
9U-7661  Bushing Base  9U-7656  Bushing Base 
9U-7651  Bushing Plunger  9U-7647
-or-
4C-6988 
Bushing Plunger 
Shim Under Plunger  1.0 mm (0.04 inch)  Shim Under Plunger  1.0 mm (0.04 inch) 
9F-5975  Socket Head Screw  9F-5975  Socket Head Screw 
1B-2578  Jam Nut  1B-2578  Jam Nut 
248-2069  Spring  248-2069  Spring 
5B-0448  Set Screw  5B-0448  Set Screw 

Table 6
Required Parts for Slip Fit Master
-
Sales ModelsMD6290, 328, 330, 336, and 340 
Required Parts for Press Fit Master
-
Sales Models MD6290, 328, 330, 336, and 340 
Quantity  Part Number  Description  Quantity  Part Number  Description 
118-7302  RH Link 
118-7303  LH Link 
6Y-2589  RH Link 
6Y-2590  LH Link 
6Y-2748  Track Pin  6Y-2748  Track Pin 
188-3066  Track Pin 
095-7944  Cotter Pin 
179-3428  Track Seal  179-3428  Track Seal 
201-0828  Track Bushing  201-0828  Track Bushing 
5F-9455  Pilot Pin  5F-9455  Pilot Pin 
9U-7771  Saddle  9U-7771  Saddle 
9U-7621  Bushing Body  9U-7621  Bushing Body 
9U-7617  Bushing Base  9U-7617  Bushing Base 
9U-7608  Bushing Plunger  9U-7608  Bushing Plunger 
Shim Under Plunger  1.0 mm (0.04 inch)  Shim Under Plunger  1.0 mm (0.04 inch) 
9F-5975  Socket Head Screw  9F-5975  Socket Head Screw 
1B-2578  Jam Nut  1B-2578  Jam Nut 
248-2069  Spring  248-2069  Spring 
5B-0448  Set Screw  5B-0448  Set Screw 

Preparation of the Link Box Section



    Illustration 2g03210816

  1. Alignment is critical. Illustration 2 displays incorrect alignment of master track links.


    Illustration 3g03319967

  2. Illustration 3 displays correct alignment of master track links.


    Illustration 4g03210759

  3. Set up the shop track press, refer to Table 2.

  4. Press the bushing into the track links. Use the shoe side of the link to locate the links.

    Table 7
    Sales Model  Bushing Projection 
    All Sales Models  0.0 mm (0.0 inch) 

    Note: The bushing will be flush with the master track links

    Note: Inspect the bolt hole pattern before shipping the link box section to the field technicians.

Preparation of the Machine

  1. Position the machine on a flat, level surface.


    Illustration 5g03210857

  2. Position the master joint between the idler & the carrier roller. Reference arrow in Illustration 5.

  3. Position the upper structure (cab) in a manner that will allow the tooling to fit properly. Reference circle in Illustration 5.

  4. Release the track tension. Refer to the machine Operation and Maintenance Manual, “Track Adjustment, Adjust”.


    Illustration 6g03877395

  5. Use track block assembly to secure both ends of the track. Reference (B) in Illustration 6. The block assembly will prevent the track from rolling off the track roller frame.


    Illustration 7g03877396


    Illustration 8g03212597

  6. Refer to Illustration 7. Remove the track bolts (1). Use the 260-9412 Lift Chain Assembly (A) to aid in the removal of the track shoe (2).

  7. Remove a total of three track shoes. Refer to Illustration 8. Remove the shoe that is attached directly to the master joint. Remove the shoes to the left and to the right of the master joint.

Conversion from Slip Fit Master Joint to Press Fit Master Joint



    Illustration 9g03275285

  1. Remove the cotter pin from the slip fit master pin.

  2. Remove the slip fit master pin from the master joint pin end. Use hammer to remove the master pin if necessary.


    Illustration 10g03212888

  3. Install cribbing underneath track if necessary.


    Illustration 11g03212895

  4. Locate the 100 ton track press to the adjacent pin that is assembled to the master joint bushing end.

  5. Use 100 ton track press to remove the track pin from the master joint bushing end.


    Illustration 12g03212924

  6. Remove the slip fit master joint from the machine. If necessary, use 360-6955 Hydraulic Press to spread the track links.


    Illustration 13g03212957

  7. Clean and install the track seals into the counterbore of the adjacent standard track links pin bore.

    Note: A small amount of grease can be used to help retain the seals in the proper position.



    Illustration 14g03213097

  8. Position the press fit master joint link box bushing end section into the adjacent standard track link pin end assembly. Use the small hydraulic press to spread the standard track links if necessary.

    Note: Caution must be observed do not damage the track seals when positioning the link box.



    Illustration 15g03213260

  9. Use starter pin to align the bores of the standard track links.

    Table 8
    Sales Model  Pin Protrusion X 
    320
    321
    322
    323
    324
    326 
    2.70 ± 0.70 mm (0.106 ± 0.027 inch) 
    325
    328
    329
    330
    336
    MD6290 
    2.0 ± 0.70 mm (0.079 ± 0.027 inch) 


    Illustration 16g03213477


    Illustration 17g03213417

  10. Install the press fit master track pin using the 100 ton press refer to Illustration 17. Check for proper pin protrusion. Refer to (X) in Illustration 16 and Table 8.

    Note: A press fit joint will maintain proper retention keeping the master track pins from walking inside the pin bore of the standard links.

    Note: Do not apply grease to the press fit master track pin or the insideof the press fit master track bushing. During assembly, the grease applied will be captured between the press fit master track pin and the pin bore of the standard links. The captured grease will contribute to pin walking in the future.



    Illustration 18g03283796

  11. Clean and install the track seals into the counterbore of the press fit master track links pin bore.

    Note: A small amount of grease can be used to help retain the seals in the proper position.



    Illustration 19g03319320

  12. Use the small hydraulic press to spread the press fit master track links if necessary.

  13. Use starter pin to align the bores of the press fit master track links.


    Illustration 20g03319345

  14. Install the press fit master track pin using the 100 ton press refer to Illustration 20. Check for proper pin protrusion. Refer to (X) in Illustration 16 and Table 8.

    Note: A press fit joint will maintain proper retention keeping the master track pins from walking inside the pin bore of the standard links.

    Note: Do not apply grease to the press fit master track pin or the insideof the adjoining track bushing. During assembly, the grease applied will be captured between the press fit master track pin and the pin bore of the press fit master links. The captured grease will contribute to pin walking in the future.



    Illustration 21g03748015

  15. All paint, loose rust, metal debris, and dirt must be removed from the mating surfaces of the track components.

    The paint on the mating surfaces of new track links must be removed before installation of the track shoes. The correct clamping force cannot be achieved if all the paint is not removed. The following methods may be used to remove the paint:

    • Use a 24-grit sandpaper to remove the paint from the mating surfaces of the track links and the track shoes. A light mist of water should be sprayed on the mating surface during the sanding. The water will help keep the sandpaper clean during sanding.

    • A paint remover may be used to remove the paint from the mating surfaces of the track links and the track shoes. Make sure that the paint remover does not contact the track seal. The paint remover can damage the track seal.

    • Do not use a torch to remove the paint from the mating surfaces of the track links and the master track links. The high temperatures can damage the track seals.

    Note: The track bolt and threads of the track nuts must be in good condition.

  16. Lubricate the threads of the track bolts and lubricate the mating surface of the bolt head with Loctite® C5-A® Copper Based Anti-Seize Compound.

  17. Align the holes in the track shoes with the holes in the track links.

    Note: The threads of the bolts will be damaged if the holes are not aligned.

  18. Place a track bolt in each hole and start the nut by hand.


    Illustration 22g03319441

  19. Follow the correct pattern in Illustration 22 to torque the bolts.

    Table 9
    Torque Specifications 
    Model  Bolt Size  Preliminary Torque  Additional Turn 
    320
    321
    322
    323
    324
    325
    326
    329 
    M20 X 1.5  400.0 ± 70.0 N·m (295.024 ± 51.63 lb ft)  120° ± 5° 
    328
    330
    336
    MD6290 
    M22 X 1.5  700 ± 70 N·m (516.29 ± 51.63 lb ft)  120° ± 5° 


    Illustration 23g03748022

  20. Perform an additional 120° turn on each track bolt to complete the torque procedure. Reference Table 9 for the proper torque value.

  21. Install the track shoes using the 194-7582 Pneumatic Wrench Gp or 194-7586 Pneumatic Wrench Gp depending on the model being serviced.


    Illustration 24g03319372

  22. Remove all blocks that were used to support the track.

  23. Remove the blocks under the grouser bars on the front and rear of the track. These blocks were used to prevent the track from rolling off the track roller frame.

  24. Adjust the tension of the track roller frame. Refer to Disassembly and Assembly for your machine for the correct procedure.

Conversion from Press Fit Master Joint to Slip Fit Master Joint

  1. Refer to the “Safety”, “Preparation of the Link Box Section” and “Preparation of the Machine” sections of this document.

  2. Locate 100 ton track press over the master pin.


    Illustration 25g03319754

  3. Press the master pin from the track links.


    Illustration 26g03319766

  4. Press the track pin from the bushing end of the master joint.


    Illustration 27g03319772

  5. Remove the link box section.

    Note: If necessary, use the small hydraulic press to spread the track links.



    Illustration 28g03319781

  6. Install new track seals into the counter bores of the master track links.


    Illustration 29g03319796

  7. Position the slip fit master joint section.

    Note: If necessary, use the small press to spread the track links.



    Illustration 30g03319806

  8. Use 100 ton track press to install track pin. Check for proper pin protrusion. Refer to (X) in Illustration 16 and Table 8.

    Note: Do not apply grease to the track pin or inside the adjoining slip fit master track bushing. During assembly, the grease applied will be captured between the track pin and the pin bore of the standard links. The captured grease will contribute to pin walking in the future.



    Illustration 31g03319817

  9. Install the track seals into the counter bore of the track links.


    Illustration 32g03319824

  10. Align the ends of the link assembly.

  11. Lubricate the master pin with grease.

    Note: Grease should be used for this installation of the slip fit master pin. The master pin cannot walk inside the track links pin ends due to the design of the pin.

  12. Use a hammer to install the master pin.


    Illustration 33g03319840

  13. Install the cotter pin in to the master pin.


    Illustration 34g03748015

  14. All paint, loose rust, metal debris, and dirt must be removed from the mating surfaces of the track components.

    The paint on the mating surfaces of new track links must be removed before installation of the track shoes. The correct clamping force cannot be achieved if all the paint is not removed. The following methods may be used to remove the paint:

    • Use a 24-grit sandpaper to remove the paint from the mating surfaces of the track links and the track shoes. A light mist of water should be sprayed on the mating surface during the sanding. The water will help keep the sandpaper clean during sanding.

    • A paint remover may be used to remove the paint from the mating surfaces of the track links and the track shoes. Make sure that the paint remover does not contact the track seal. The paint remover can damage the track seal.

    • Do not use a torch to remove the paint from the mating surfaces of the track links and the master track links. The high temperatures can damage the track seals.

    Note: The track bolt and threads of the track nuts must be in good condition.

  15. Lubricate the threads of the track bolts and lubricate the mating surface of the bolt head with Loctite® C5-A® Copper Based Anti-Seize Compound.

  16. Align the holes in the track shoes with the holes in the track links.

    Note: The threads of the bolts will be damaged if the holes are not aligned.

  17. Place a track bolt in each hole and start the nut by hand.


    Illustration 35g03319441

  18. Follow the correct pattern in Illustration 35 to torque the bolts.

    Table 10
    Torque Specifications 
    Model  Bolt Size  Preliminary Torque  Additional Turn 
    320
    321
    322
    323
    324
    325
    326
    329 
    M20 X 1.5  400.0 ± 70.0 N·m (295.024 ± 51.63 lb ft)  120° ± 5° 
    328
    330
    336
    MD6290 
    M22 X 1.5  700 ± 70 N·m (516.29 ± 51.63 lb ft)  120° ± 5° 


    Illustration 36g03748022

  19. Perform an additional 120° turn on each track bolt to complete the torque procedure. Reference table 10 for the proper torque value.

  20. Install the track shoes using the 194-7582 Pneumatic Wrench Gp or 194-7586 Pneumatic Wrench Gp depending on the model being serviced.


    Illustration 37g03319372

  21. Remove all blocks that were used to support the track.

  22. Remove the blocks under the grouser bar on the front and rear of the track. These blocks were used to prevent the track from rolling off the track roller frame.

  23. Adjust the tension of the track roller frame. Refer to Disassembly and Assembly for your machine for the correct procedure.

Caterpillar Information System:

C175-16 Locomotive Engine Lifter Group
CX48-P2300 Petroleum Transmission Transmission Oil Filter (Transmission)
2012/09/17 A New Unit Injector Hydraulic Pump Group Is Available for Certain C9 Commercial Engines {1714}
G3500 Engines Exhaust Manifold - Water Cooled
2012/08/30 Cylinder Pack Upgrade Is Available for Certain 3406B and 3406C Engines When Replacing All Six Cylinders Packs {1201, 1225}
3512B and 3512C Petroleum Generator Set Engines Prelube Pump
G3500 Engines Exhaust Manifold - Water Cooled
G3500 Engines Cylinder Block
G3500 Engines Turbocharger
G3500 Engines Cylinder Block
G3500 Engines Turbocharger
G3500 Engines Cylinder Block
Inspect the Coolant Diverter Valve Diaphram When Replacing a Failed Precooler on Certain C15 Truck Engines{135D} Inspect the Coolant Diverter Valve Diaphram When Replacing a Failed Precooler on Certain C15 Truck Engines{135D}
C32 Marine Engine Engine Oil and Filter - Change
Cat Alarm and Protection (A;P) Control Panel{7451} Cat Alarm and Protection (A&P) Control Panel{7451}
Operators Manual for the Three60 Precision Control System {3065, 4000, 4343, 7004} Operators Manual for the Three60 Precision Control System {3065, 4000, 4343, 7004}
C32 Auxiliary Engine Engine Rating Conditions
3500B and 3500C Marine Engines Engine Oil Filter - Duplex
G3500 Engines Exhaust Manifold
336F MHPU Mobile Hydraulic Power Unit Machine System Specifications Cab - Protection Visor
C175-16 and C175-20 Generator Set Engines Fuel System Verification - Test
C175-16 Locomotive Engine Fuel Priming Pump - Test
330F MHPU Mobile Hydraulic Power Unit Machine System Solenoid Valve (Quick Coupler)
C175-16 Locomotive Engine Prelubrication - Test
Back to top
The names Caterpillar, John Deere, JD, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
CH-Part.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only.