- Caterpillar Products
- Machines with Greased Lubricated Track (GLT)
Introduction
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 1 | 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. 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.
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. |
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. |
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. |
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 Society2501 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 LaborWashington, 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
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 |
1 | Loctite® C5-A® | Copper Based Anti-Seize Compound | - | ||
1 | Chain Assembly | ||||
2 | Track Block Assembly | ||||
1 | Grease Cartridge | ||||
1 | Hydraulic Press | ||||
1 | Pneumatic Wrench Gp | ||||
1 | Pneumatic Wrench Gp | ||||
100 Ton Press | Track Press Tool Group | ||||
Double Acting Cylinder | |||||
Track Press Rollover Group |
Required Parts
Required Parts for Slip Fit Master
- Sales Models 320, 321, and 323 |
Required Parts for Press Fit Master
- Sales Models 320, 321, and 323 |
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---|---|---|---|---|---|
Quantity | Part Number | Description | Quantity | Part Number | Description |
2 | RH Link | - | - | - | |
2 | LH Link | - | - | - | |
- | - | - | 2 | RH Link | |
- | - | - | 2 | LH Link | |
2 | Track Pin | 4 | Track Pin | ||
2 | Track Pin | - | - | - | |
2 | Cotter Pin | - | - | - | |
8 | Track Seal | 8 | Track Seal | ||
2 | Track Bushing | 2 | Track Bushing | ||
1 | Pilot Pin | 1 | Pilot Pin | ||
1 | Saddle | 1 | Saddle | ||
2 | Bushing Body | 2 | Bushing Body | ||
2 | Bushing Base | 2 | Bushing Base | ||
2 | -or- |
Bushing Plunger | 2 | -or- |
Bushing Plunger |
Shim Under Plunger | |
Shim Under Plunger | |
||
4 | Socket Head Screw | 4 | Socket Head Screw | ||
2 | Jam Nut | 2 | Jam Nut | ||
2 | Spring | 2 | Spring | ||
2 | Set Screw | 2 | Set Screw |
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 |
2 | RH Link | - | - | - | |
2 | LH Link | - | - | - | |
- | - | - | 2 | RH Link | |
- | - | - | 2 | LH Link | |
2 | Track Pin | 4 | Track Pin | ||
2 | Track Pin | - | - | - | |
2 | Cotter Pin | - | - | - | |
8 | Track Seal | 8 | Track Seal | ||
2 | Track Bushing | 2 | Track Bushing | ||
1 | Pilot Pin | 1 | Pilot Pin | ||
1 | Saddle | 1 | Saddle | ||
2 | Bushing Body | 2 | Bushing Body | ||
2 | Bushing Base | 2 | Bushing Base | ||
2 | -or- |
Bushing Plunger | 2 | -or- |
Bushing Plunger |
Shim Under Plunger | |
Shim Under Plunger | |
||
4 | Socket Head Screw | 4 | Socket Head Screw | ||
2 | Jam Nut | 2 | Jam Nut | ||
2 | Spring | 2 | Spring | ||
2 | Set Screw | 2 | Set Screw |
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 |
2 | RH Link | - | - | - | |
2 | LH Link | - | - | - | |
- | - | - | 2 | RH Link | |
- | - | - | 2 | LH Link | |
2 | Track Pin | 4 | Track Pin | ||
2 | Track Pin | - | - | - | |
2 | Cotter Pin | - | - | - | |
8 | Track Seal | - | - | - | |
2 | Track Bushing | - | - | - | |
- | - | - | 8 | Track Seal | |
- | - | - | 2 | Track Bushing | |
1 | Pilot Pin | 1 | Pilot Pin | ||
1 | Saddle | 1 | Saddle | ||
2 | Bushing Body | 2 | Bushing Body | ||
2 | Bushing Base | 2 | Bushing Base | ||
2 | Bushing Plunger | 2 | -or- |
Bushing Plunger | |
Shim Under Plunger | |
Shim Under Plunger | |
||
4 | Socket Head Screw | 4 | Socket Head Screw | ||
2 | Jam Nut | 2 | Jam Nut | ||
2 | Spring | 2 | Spring | ||
2 | Set Screw | 2 | Set Screw |
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 |
2 | RH Link | - | - | - | |
2 | LH Link | - | - | - | |
- | - | - | 2 | RH Link | |
- | - | - | 2 | LH Link | |
2 | Track Pin | 4 | Track Pin | ||
2 | Track Pin | - | - | - | |
2 | Cotter Pin | - | - | - | |
8 | Track Seal | 8 | Track Seal | ||
2 | Track Bushing | 2 | Track Bushing | ||
1 | Pilot Pin | 1 | Pilot Pin | ||
1 | Saddle | 1 | Saddle | ||
2 | Bushing Body | 2 | Bushing Body | ||
2 | Bushing Base | 2 | Bushing Base | ||
2 | Bushing Plunger | 2 | Bushing Plunger | ||
Shim Under Plunger | |
Shim Under Plunger | |
||
4 | Socket Head Screw | 4 | Socket Head Screw | ||
2 | Jam Nut | 2 | Jam Nut | ||
2 | Spring | 2 | Spring | ||
2 | Set Screw | 2 | Set Screw |
Preparation of the Link Box Section
- Alignment is critical. Illustration 2 displays incorrect alignment of master track links.
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Illustration 3 g03319967 - Illustration 3 displays correct alignment of master track links.
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Illustration 4 g03210759 - Set up the shop track press, refer to Table 2.
- Press the bushing into the track links. Use the shoe side of the link to locate the links.
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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.
Illustration 2 | g03210816 |
Preparation of the Machine
- Position the machine on a flat, level surface.
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Illustration 5 g03210857 - Position the master joint between the idler & the carrier roller. Reference arrow in Illustration 5.
- Position the upper structure (cab) in a manner that will allow the tooling to fit properly. Reference circle in Illustration 5.
- Release the track tension. Refer to the machine Operation and Maintenance Manual, “Track Adjustment, Adjust”.
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Illustration 6 g03877395 - 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.
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Illustration 7 g03877396 Show/hide tableIllustration 8 g03212597 - 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).
- 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
- Remove the cotter pin from the slip fit master pin.
- Remove the slip fit master pin from the master joint pin end. Use hammer to remove the master pin if necessary.
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Illustration 10 g03212888 - Install cribbing underneath track if necessary.
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Illustration 11 g03212895 - Locate the 100 ton track press to the adjacent pin that is assembled to the master joint bushing end.
- Use 100 ton track press to remove the track pin from the master joint bushing end.
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Illustration 12 g03212924 - Remove the slip fit master joint from the machine. If necessary, use 360-6955 Hydraulic Press to spread the track links.
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Illustration 13 g03212957 - 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.
Show/hide tableIllustration 14 g03213097 - 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.
Show/hide tableIllustration 15 g03213260 - Use starter pin to align the bores of the standard track links.
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Table 8 Sales Model Pin Protrusion X 320
321
322
323
324
3262.70 ± 0.70 mm (0.106 ± 0.027 inch) 325
328
329
330
336
MD62902.0 ± 0.70 mm (0.079 ± 0.027 inch) Show/hide tableIllustration 16 g03213477 Show/hide tableIllustration 17 g03213417 - 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.
Show/hide tableIllustration 18 g03283796 - 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.
Show/hide tableIllustration 19 g03319320 - Use the small hydraulic press to spread the press fit master track links if necessary.
- Use starter pin to align the bores of the press fit master track links.
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Illustration 20 g03319345 - 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.
Show/hide tableIllustration 21 g03748015 - 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.
- 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.
- 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.
- Place a track bolt in each hole and start the nut by hand.
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Illustration 22 g03319441 - Follow the correct pattern in Illustration 22 to torque the bolts.
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Table 9 Torque Specifications Model Bolt Size Preliminary Torque Additional Turn 320
321
322
323
324
325
326
329M20 X 1.5 400.0 ± 70.0 N·m (295.024 ± 51.63 lb ft) 120° ± 5° 328
330
336
MD6290M22 X 1.5 700 ± 70 N·m (516.29 ± 51.63 lb ft) 120° ± 5° Show/hide tableIllustration 23 g03748022 - Perform an additional 120° turn on each track bolt to complete the torque procedure. Reference Table 9 for the proper torque value.
- Install the track shoes using the 194-7582 Pneumatic Wrench Gp or 194-7586 Pneumatic Wrench Gp depending on the model being serviced.
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Illustration 24 g03319372 - Remove all blocks that were used to support the track.
- 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.
- Adjust the tension of the track roller frame. Refer to Disassembly and Assembly for your machine for the correct procedure.
Illustration 9 | g03275285 |
Conversion from Press Fit Master Joint to Slip Fit Master Joint
- Refer to the “Safety”, “Preparation of the Link Box Section” and “Preparation of the Machine” sections of this document.
- Locate 100 ton track press over the master pin.
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Illustration 25 g03319754 - Press the master pin from the track links.
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Illustration 26 g03319766 - Press the track pin from the bushing end of the master joint.
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Illustration 27 g03319772 - Remove the link box section.
Note: If necessary, use the small hydraulic press to spread the track links.
Show/hide tableIllustration 28 g03319781 - Install new track seals into the counter bores of the master track links.
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Illustration 29 g03319796 - Position the slip fit master joint section.
Note: If necessary, use the small press to spread the track links.
Show/hide tableIllustration 30 g03319806 - 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.
Show/hide tableIllustration 31 g03319817 - Install the track seals into the counter bore of the track links.
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Illustration 32 g03319824 - Align the ends of the link assembly.
- 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.
- Use a hammer to install the master pin.
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Illustration 33 g03319840 - Install the cotter pin in to the master pin.
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Illustration 34 g03748015 - 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.
- 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.
- 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.
- Place a track bolt in each hole and start the nut by hand.
Show/hide table
Illustration 35 g03319441 - Follow the correct pattern in Illustration 35 to torque the bolts.
Show/hide table
Table 10 Torque Specifications Model Bolt Size Preliminary Torque Additional Turn 320
321
322
323
324
325
326
329M20 X 1.5 400.0 ± 70.0 N·m (295.024 ± 51.63 lb ft) 120° ± 5° 328
330
336
MD6290M22 X 1.5 700 ± 70 N·m (516.29 ± 51.63 lb ft) 120° ± 5° Show/hide tableIllustration 36 g03748022 - Perform an additional 120° turn on each track bolt to complete the torque procedure. Reference table 10 for the proper torque value.
- Install the track shoes using the 194-7582 Pneumatic Wrench Gp or 194-7586 Pneumatic Wrench Gp depending on the model being serviced.
Show/hide table
Illustration 37 g03319372 - Remove all blocks that were used to support the track.
- 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.
- Adjust the tension of the track roller frame. Refer to Disassembly and Assembly for your machine for the correct procedure.