- Caterpillar Products
- Machines with Grease Lubricated Track with Swage
- Machines with Greased Lubricated Track (GLT)
- Machines with Positive Pin Retention (PPR) Track
- Machines with Positive Pin Retention 2 (PPR2) Track
- Machines with Rotating Bushing Track
- Machines with Sealed Positive Pin Retention (PPR) Track
- Machines with Sealed Track
- Machines with Sleeve Bearing Track
- Machines with SystemOne Undercarriage
- Machines with non-PPR Sealed and Lubricated Track
- Machines with Greased Lubricated Track (GLT)
- Pipelayer
- PL72 (S/N: P721-UP; P731-UP)
- PL83 (S/N: CB21-UP; DLW1-UP)
- PL87 (S/N: TEC1-UP; ZAC1-UP)
- PL83 (S/N: CB21-UP; DLW1-UP)
- Track Drills
- MD5150C (S/N: SEY1-UP)
Introduction
Revision | Summary of Changes in SEBF8580 |
22 | Added serial number prefixes for New Product Introduction. |
21 | Added serial number prefixes for New Product Introduction.
Added model 340F, 558GF, AND AP655F. |
20 | Added serial number prefixes for New Product Introduction. |
19 | Added serial number prefixes for New Product Introduction.
Added model D6K2. Added part number 375-6431 to document. |
18 | Added serial number prefixes for New Product Introduction.
Added model PL72 |
© 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 Cat 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
The following information is given to provide Disassembly and Assembly procedures for Carrier Rollers. The information in this bulletin should serve as an aid in determining whether a carrier roller can be reconditioned. During rebuild procedures, always correct any conditions which may have caused the original failure or wear and never install a component that falls within the "Do not use again" criteria.
References
Undercarriage Reconditioning Bulletin, SEBF8511, "Reusability and Assembly Recommendations for Duo-Cone Seals"
Undercarriage Reconditioning Bulletin, SEBF8575, "Oil Fill Volumes for Carrier Rollers"
Undercarriage Reconditioning Bulletin, SEHS8364, "Assembly and Installation of Conventional Duo-Cone Seals"
Undercarriage Reconditioning Bulletin, SEHS8484, "Tool and Specification Chart for Conventional Duo-Cone Seals"
Undercarriage Reconditioning Bulletin, SEBF8594, "Nitrogen Pressure Test Unit"
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 call attention to 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 does not include all canceled part number and replaced part number information. 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
(1) | 8P-6256 Carrier Roller Group is standard removal for 9P-2663 Carrier Roller Group. |
(2) | 1P-8717 Carrier Roller Group is standard removal for 2P-3514 Carrier Roller Group. |
Disassembly
- Remove the plug from the cover on the roller.
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Illustration 3 g02393036 Drain the oil. - Drain the oil from the carrier roller.
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Illustration 4 g02393040 Unbolt the cover. Show/hide tableIllustration 5 g02393043 Remove the cover. - Unbolt and remove the cover from the end of the roller.
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Illustration 6 g02393056 Bolts, lock, and plate in carrier roller. Show/hide tableIllustration 7 g02393062 Remove bolts, lock, and plate. Show/hide tableIllustration 8 g02393078 Bolts, lock, and plate removed. - Remove the bolts, lock, and plate from the end of the shaft.
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Illustration 9 g02393097 - Compress the collar using a press or tooling.
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Illustration 10 g02393101 - Remove the retaining ring while the collar is compressed.
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Illustration 11 g02393116 - Remove the collar from the carrier roller.
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Illustration 12 g02393117 Note: Refer to Reuse and Salvage Guideline, SEBF8511, "Reusability and Assembly Recommendations for Duo-Cone Seals" for proper Duo-Cone seal reuse information.
- Remove the Duo-Cone seals from the carrier roller and inspect for reusability.
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Illustration 13 g02393118 - Duo-Cone seals removed from carrier roller shaft.
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Illustration 14 g02393119 - Remove the Duo-Cone seals from the collar assembly.
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Illustration 15 g02393120 - Place the roller in the carrier roller press.
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Illustration 16 g02393123 - Press the shaft out of the carrier roller.
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Illustration 17 g02393127 - Remove the bearing cone from the shaft.
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Illustration 18 g02393130 Remove bearing cups
(1) Carrier roller
(2) Bearing cups - Remove the bearing cups from the carrier roller using the proper driver.
- Remove the shaft o-ring.
Illustration 2 | g02393017 |
Remove the plug. |
Assembly
- Place the bearing cone on the shaft.
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Illustration 20 g02393134 (1) Carrier roller
(2) Bearing cups - Install the bearing cups in the roller using the proper installer.
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Illustration 21 g02393156 - Install the shaft into the carrier roller
- Remove all dirt and debris from the seal ramp.
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Illustration 22 g02393176 - Install the Duo-Cone seals into the carrier roller using an even, perpendicular force on the seal installation tool. (See Tooling reference for proper seal installation tool.)
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Illustration 23 g02393178 - Install the Duo-Cone seals into the collars.
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Illustration 24 g02393179 - Wipe the Duo-Cone seal faces in both the roller and collar with a clean, dry lint free cloth.
- Lightly oil the entire seal faces with a thin coat of oil.
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Illustration 25 g02393182 - Place a new o-ring on the carrier roller shaft. Lightly oil the entire shaft o-ring.
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Illustration 26 g02393183 - Install the collar on the shaft.
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Illustration 27 g02393185 - Compress the collar down the shaft using the press until the retaining ring groove is exposed.
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Illustration 28 g02393196 - Install the retaining ring while the collar is compressed.
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Illustration 29 g02393336 - Install retaining ring.
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Illustration 30 g02393357 - Install the top bearing cone.
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Illustration 31 g02393362 (1) Carrier roller
(2) Carrier roller shaft
(3) Top bearing cup
(4) Top bearing cone - Install the plate, lock, and bolts in the end of the shaft.( See (4) Table 2 for proper torque specifications.)
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Illustration 32 g02393376 - Replace the plate, lock, and bolts.
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Illustration 33 g02393379 Install the top cover. - Bolt the top cover onto the carrier roller. (See Table 5 for proper torque specifications.)
Note: Static inspection torque values listed are minimum requirements but must not exceed the upper limit for dynamic assembly torque.
Show/hide tableIllustration 34 g02443016 Refer to Undercarriage Reconditioning Bulletin, SEBF8594, "Nitrogen Pressure Test Unit FT2724" Show/hide tableNOTICE Repair Process Engineering no longer supports vacuum testing of undercarriage components. The use of the Nitrogen Pressure Test Unit referred to in SEBF8594 is an acceptable practice.
Note: Contamination can cause a good component joint to fail. The use of nitrogen instead of shop air will ensure that clean harmless gas enters the cavity. Unless the shop air is filtered and ran through a dryer, the air will contain harmful particles and water. Untreated air will then enter the component joint and cause premature failure.
Show/hide tableIllustration 35 g02722068 (1) 8T-0831 Lubricator Tip
(2) 4C-7099 Reducer Fitting
(3) 170-5665 Pressure Tester
(4) 5P-8998 Pipe Fitting
(5) 006-0210 Pipe Tee
(6) 8T-0848 Pressure Gauge
(7) 4C-7090 Ball Valve - Pressure test the carrier roller using the FT2724 Nitrogen Pressure Testing Tool.
(A.) Prior to test, rotate the shaft a minimum of 20 revolutions in each direction.
(B.) Introduce nitrogen into the lubricant cavity to a pressure of
138 kPa (20.0 psi) . The cavity is to be sealed and pressure observed for 10 seconds. A pressure drop of3.5 kPa (0.5 psi) or less is acceptable
Illustration 19 | g02393133 |
NOTICE |
---|
Do not allow nitrogen to enter in a surge and do not use pressure in excess of |
Illustration 36 | g02393398 |
Use a rubber stopper to seal the lubricant cavity. Be sure to place the wide end of the stopper against the plug hole on the carrier roller cover. (1) Rubber stopper (2) FT2724 Nitrogen Pressure Test Tool (3) Carrier roller cover |
Illustration 37 | g02393401 |
Replace plug o-ring. |
Note: Refer to Reuse and Salvage Guideline, SEBF8575, "Oil Fill Volumes for Carrier Rollers" for proper oil fill volumes and types.
Fill the carrier roller with the proper volume of oil. Replace the rubber o-ring on the plug if necessary, and install the plug into the carrier roller cover. (See Table 5 for proper plug torque value.)
Illustration 38 | g02393404 |
Tap the roller shaft to determine if the roller contains oil. |
Tap the end of the carrier roller shaft with a hammer to determine whether the roller contains oil. If there is a dull thud, the roller is full. There will be a ringing noise if the roller is empty.
Table 5
TORQUE SPECIFICATIONS FOR CARRIER ROLLERS |
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Carrier Roller Group | Cover Bolt Torque Specifications | Shaft Bolt Torque Specifications | Plug Torque Specification |
Bolt Assembly Torque | Bolt Assembly Torque | ||
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N/A | |
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N/A | |
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N/A | |
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