- Caterpillar Products
- Machines with Greased Lubricated Track (GLT)
- Machines with Positive Pin Retention 2 (PPR2) Track
- Machines with Sealed Positive Pin Retention (PPR) Track
- Machines with Positive Pin Retention 2 (PPR2) Track
Introduction
Revision | Summary of Changes in SEBF8495 |
18 | Added serial number prefixes for New Product Introduction. |
17 | Added serial number prefixes for New Product Introduction.
Added 311F, 312D2, 318D2, 323D2, 325F, 336F, 352F, 538B, and 6015B to tables. |
16 | RPE SEBF8495, Hydraulic Excavator Idler Disassembly and Assembly ProceduresAdded 312F, 313F, 316F318F, 320F, 323D2, and 336D2 to document. |
15 | Added serial number prefixes for New Product Introduction.
Added 374F and 390Fto document. |
14 | Added serial number prefixes for New Product Introduction.
Added 307E2, 308E2, and 312D2. |
© 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
The following information provides Disassembly and Assembly procedures. The information in the bulletin should serve as an aid in determining whether a Hydraulic Excavator idler can be reconditioned. Correct any conditions which may have caused the original failure during the rebuild.
References
Reference: Undercarriage Reconditioning Guide, SEBF8599
Reference: Undercarriage Reconditioning Bulletin, SEBF8586, "Removal, Installation, and Conditioning of Idler Bearings and Track Roller Bearings"
Reference: Undercarriage Reconditioning Bulletin, SEBF8511, "Reusability Recommendations for Duo-Cone Seals"
Reference: Undercarriage Reconditioning Bulletin, SEBF8596, "Guideline for Roller and Idler Component Reuse"
Reference: Undercarriage Reconditioning Bulletin, SEBF8552, "Idler Weld Rebuild Procedure"
Reference: Undercarriage Reconditioning Bulletin, SEBF8576, "Idler Oil Fill Volume"
Reference: Special Instructions, SEHS8484, "Tool and Specification Chart for Conventional Duo-Cone Seal"
Reference: Special Instructions, SEHS8364, "Assembly and Installation of Conventional Duo-Cone Seals"
Reference: Catalog, NENG2500, "Dealer Service Tools Catalog"
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 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.
Required Tooling
Part Number | Description |
---|---|
Vacuum Tank Assembly | |
Dial Caliper As | |
Installer Tool | |
Grease-Petro Gel | |
15W40 DEO 55 Gal Drum | |
Thread Lock Compound |
Disassembly
- Clean the exterior of the idler. Place the idler on a table for service.
Show/hide table
Illustration 3 g03880461 - Remove the plug to drain the oil from the idler.
- Use FT-1238 Vacuum Tank Assembly to drain the oil.
Show/hide table
Illustration 4 g03880467 - Use a punch and a hammer to remove the two retaining pins.
Show/hide table
Illustration 5 g02019253 - Use a puller to remove the two bearing blocks from the idler shaft. The bearing block weighs approximately
18 kg (40.0 lb) .Show/hide tableIllustration 6 g02019274 - Remove the O-ring seal from the shaft.
Show/hide table
Illustration 7 g02019993 - Remove the Duo-Cone seals from the bearing blocks and the idler assembly.
- Inspect each set of Duo-Cone seals for reusability. Refer to Undercarriage Reconditioning Bulletin, SEBF8511, "Reusability Recommendations for Duo-Cone Seals".
Note: If the seals are reusable, the seals must be kept in matching pairs.
- Measure the clearance between the shaft and bearing at the top center position of the idler. Refer to Table 3 for the correct dimensions.
Note: Table 4 and Table 5 include the dimensions to determine the clearance between the shaft and the bearing. A feeler gauge may be used as a quick check for the clearance.
If the clearance measurements are not acceptable, an evaluation will be necessary to determine the problem. The following procedures can be taken to correct the problem:
- Recondition the existing bearing bore.
- Recondition the bore of the idler and install new bearings.
- Replace the idler shaft.
Note: Refer to Undercarriage Reconditioning Bulletin, SEBF8586, "Removal, Installation, and Conditioning of Idler Bearings and Track Roller Bearings".
Show/hide tableTable 3 Clearance Between the Shaft and the Bearing Sales Model Idler Group Maximum Clearance Minimum Clearance 307
307B115-6336 0.27 mm (0.011 inch) 0.10 mm (0.004 inch) 307E2
308E2422-0868 433-3881 0.27 mm (0.011 inch) 0.10 mm (0.004 inch) 307B
307C
307D
308C
308D277-8667 0.27 mm (0.011 inch) 0.10 mm (0.004 inch) 311
311B
311C
311D
311F
312
312B
312C
312D
312D2
312E
312F
313B
313C
313D
313D2
313F
314C
314E4I-7337 0.29 mm (0.011 inch) 0.11 mm (0.004 inch) 313D2
315
315B
315C
315D
316F
317
317B
318B
318C
318D
318D2
318E
318F
319C
319D
320
320B
320C
320D
320D2
320E
320F
321C
321D
323D
323D2
323F
325F
MD5075
MD5075C
MD5150
MD5150C248-7143 0.35 mm (0.014 inch) 0.12 mm (0.005 inch) 538B 386-4139 0.35 mm (0.014 inch) 0.12 mm (0.005 inch) 320
325102-8155 0.48 mm (0.019 inch) 0.25 mm (0.010 inch) 320B
320C
322C
323D
323D2
324D
325B
325C
325D
329D115-3696 0.48 mm (0.019 inch) 0.25 mm (0.010 inch) 322B
322C
324D
326D115-6337 0.35 mm (0.014 inch) 0.12 mm (0.005 inch) 322C 194-1130 0.35 mm (0.014 inch) 0.12 mm (0.005 inch) 325D 239-3690 0.48 mm (0.019 inch) 0.25 mm (0.010 inch) 328D
330
330B
330C
330D
336D
336D2
336E
336F
340D
340D2
MD6240
MD6290136-2422 0.48 mm (0.019 inch) 0.25 mm (0.010 inch) 330 102-8152 0.48 mm (0.019 inch) 0.25 mm (0.010 inch) 330D 239-3691 0.48 mm (0.019 inch) 0.25 mm (0.010 inch) 312D2
330C
330D
345B
345C
345D
349E
349D
349F
568
MD6420
MD6420B
MD6420C248-7151 0.48 mm (0.019 inch) 0.25 mm (0.010 inch) 345B
345C
345D
3459D297-9264 0.48 mm (0.019 inch) 0.25 mm (0.010 inch) 350 135-8903 0.48 mm (0.019 inch) 0.25 mm (0.010 inch) 352F 357-7995 365B
365C136-2429 248-7256 0.48 mm (0.019 inch) 0.25 mm (0.010 inch) 374D
374F
365C
365CL
365B
365BL
MD6640
MD6540
MD6540C340-8250 0.48 mm (0.019 inch) 0.25 mm (0.010 inch) 375
5080135-8904 0.48 mm (0.019 inch) 0.25 mm (0.010 inch) 385B
385C
5090194-1157 248-7257 0.48 mm (0.019 inch) 0.25 mm (0.010 inch) 390D
390F248-7257 340-8242 0.48 mm (0.019 inch) 0.25 mm (0.010 inch) 5110B 121-7351 0.42 mm (0.017 inch) 0.24 mm (0.009 inch) 6015B 430-4193 0.42 mm (0.017 inch) 0.24 mm (0.009 inch) Show/hide tableTable 4 Dimensions for Rebuilding the Idler Sales Model Idler Assembly Inside Diameter of the Idler Width of the Hub Part Number for the Bearing Inside Diameter of the Bearing Assembly 307E2
308E2422-0870 54.015 ± 0.015 mm (2.12657 ± 0.00059 inch) 89 ± 0.1 mm (3.504 ± 0.004 inch) 294-5350 51 ± 0.07 mm (2.008 ± 0.003 inch) 294-5349 50.114 ± 0.068 mm (1.97299 ± 0.00268 inch) 92.75 ± 0.2 mm (3.65 ± 0.008inch) 307
307B115-6335 44.0125 ± 0.0125 mm (1.73277 ± 0.00050 inch) 89.0 ± 0.1 mm (3.50 ± 0.004 inch) 5I-6274 40.112 ± 0.066 mm (1.5792 ± 0.0026 inch) 307B
307C
307D
308C
308D277-8669 44.0125 ± 0.0125 mm (1.73277 ± 0.00050 inch) 89.0 ± 0.1 mm (3.50 ± 0.004 inch) 5I-6274 40.112 ± 0.066 mm (1.5792 ± 0.0026 inch) 311
311B
311C
311D
311F
312
312B
312C
312D
312D2
312E
312F
313B
313C
313D
313F
314C
314E
314F
315F6I-6590 59.015 ± 0.015 mm (2.3234 ± 0.0006 inch) 110.0 ± 0.1 mm (4.33 ± 0.004 inch) 099-0157 55.114 ± 0.068 mm (2.1698 ± 0.0027 inch) 313D2
315
315B
315C
315D
316F
317
317B
318B
318C
318D
318E
318F
319C
319D
320
320B
320C
320D
320D2
320E
320F
321C
321D
323D
323F
323D2
325F
MD5075
MD5075C
MD5150
MD5150C262-4781 72.015 ± 0.025 mm (2.8352 ± 0.0010 inch) 135.8 ± 0.1 mm (5.35 ± 0.004 inch) 8E-4359 65.15 ± 0.09 mm (2.565 ± 0.004 inch) 538B 384-5482 72.015 ± 0.025 mm (2.8352 ± 0.0010 inch) 135.8 ± 0.1 mm (5.35 ± 0.004 inch) 8E-4359 65.15 ± 0.09 mm (2.565 ± 0.004 inch) 320
320B
320C
322C
323D
324D
325
325B
325C
325D
329D115-7471 82.155 ± 0.025 mm (3.2344 ± 0.0010 inch) 149.2 ± 0.1 mm (5.87 ± 0.004 inch) 6Y-2272 75.31 ± 0.09 mm (2.965 ± 0.004 inch) 322
322B
322C
324D
326D115-4931 77.980 ± 0.025 mm (3.0701 ± 0.0010 inch) 140.0 ± 0.1 mm (5.51 ± 0.004 inch) 6I-9587 70.065 ± 0.09 mm (2.7585 ± 0.0035 inch) 325D 235-8531 82.155 ± 0.025 mm (3.2344 ± 0.0010 inch) 149.2 ± 0.1 mm (5.87 ± 0.004 inch) 6Y-2272 75.31 ± 0.09 mm (2.965 ± 0.004 inch) 328D
330
330B
330C
330D
336D
336D2
336E
340D
340D2
MD6240
MD6290136-3847 92.210 ± 0.025 mm (3.6303 ± 0.0010 inch) 175.2 ± 0.1 mm (6.90 ± 0.004 inch) 6Y-8023 85.365 ± 0.09 mm (3.3608 ± 0.0035 inch) 330D 235-8536 92.210 ± 0.025 mm (3.6303 ± 0.0010 inch) 175.2 ± 0.1 mm (6.90 ± 0.004 inch) 6Y-8023 85.365 ± 0.09 mm (3.3608 ± 0.0035 inch) 312D2
330C
330D
345B
345C
345D
349E
349D
568
MD6420
MD6420B
MD6420C264-9821 112.125 ± 0.025 mm (4.4144 ± 0.0010 inch) 175.2 ± 0.1 mm (6.90 ± 0.004 inch) 124-9979 105.28 ± 0.09 mm (4.145 ± 0.004 inch) 345B
345C
345D
349D337-6894 112.125 ± 0.025 mm (4.4144 ± 0.0010 inch) 175.2 ± 0.1 mm (6.90 ± 0.004 inch) 124-9979 105.28 ± 0.09 mm (4.145 ± 0.004 inch) 350 138-8389 112.125 ± 0.025 mm (4.4144 ± 0.0010 inch) 220.2 ± 0.1 mm (8.67 ± 0.004 inch) 8E-4343 105.28 ± 0.09 mm (4.145 ± 0.004 inch) 352F 383-1612 112.125 ± 0.025 mm (4.4144 ± 0.0010 inch) 175.2 ± 0.1 mm (6.90 ± 0.004 inch) 124-9979 105.28 ± 0.09 mm (4.145 ± 0.004 inch) 365B
365C141-2697 122.155 ± 0.025 mm (4.8092 ± 0.0010 inch) 253.2 ± 0.1 mm (9.97 ± 0.004 inch) 6Y-7599 115.31 ± 0.09 mm (4.540 ± 0.004 inch) 365B
365C278-7284 122.155 ± 0.025 mm (4.8092 ± 0.0010 inch) 253.2 ± 0.1 mm (9.97 ± 0.004 inch) 6Y-7599 115.31 ± 0.09 mm (4.540 ± 0.004 inch) 374D
374F
365C
365CL
365B
365BL
MD6640
MD6540
MD6540C352-3735 122.155 ± 0.025 mm (4.8092 ± 0.0010 inch) 253.2 ± 0.1 mm (9.97 ± 0.004 inch) 6Y-7599 115.31 ± 0.09 mm (4.540 ± 0.004 inch) 375
5080138-8388 122.155 ± 0.025 mm (4.8092 ± 0.0010 inch) 253.2 ± 0.1 mm (9.97 ± 0.004 inch) 6Y-7599 115.31 ± 0.09 mm (4.540 ± 0.004 inch) 385B
385C
5090203-4862 122.155 ± 0.025 mm (4.8092 ± 0.0010 inch) 253.2 ± 0.1 mm (9.97 ± 0.004 inch) 6Y-7599 115.31 ± 0.09 mm (4.540 ± 0.004 inch) 385B
385C
5090278-7286 122.155 ± 0.025 mm (4.8092 ± 0.0010 inch) 253.2 ± 0.1 mm (9.97 ± 0.004 inch) 6Y-7599 115.31 ± 0.09 mm (4.540 ± 0.004 inch) 390D
390F278-7286 352-3740 122.155 ± 0.025 mm (4.8092 ± 0.0010 inch) 253.2 ± 0.1 mm (9.97 ± 0.004 inch) 6Y-7599 115.31 ± 0.09 mm (4.540 ± 0.004 inch) 5110B 121-7351 166.000 ± 0.025 mm (6.5354 ± 0.0010 inch) 266.0 ± 0.1 mm (10.47 ± 0.004 inch) 121-7371 150.180 ± 0.065 mm (5.9126 ± 0.0026 inch) 6015B 435-4448 166.000 ± 0.025 mm (6.5354 ± 0.0010 inch) 266.0 ± 0.1 mm (10.47 ± 0.004 inch) 121-7371 150.180 ± 0.065 mm (5.9126 ± 0.0026 inch) Show/hide tableTable 5 Specifications for the Shaft Sales Model Idler Assembly Shaft Outside Diameter of the Shaft Length of the Bearing Surface 307E2
308E2422-0870 422-0871 49.93 ± 0.02 mm (1.96574 ± 0.00079 inch) 69 ± 0.5 mm (2.72 ± 0.02 inch) 294-5349 294-5348 307
307B115-6335 102-8082 39.93 ± 0.02 mm (1.572 ± 0.001 inch) 92.75 ± 0.20 mm (3.652 ± 0.008 inch) 307B
307C
307D
308C
308D277-8668 185-9185 39.93 ± 0.02 mm (1.572 ± 0.001 inch) 92.75 ± 0.20 mm (3.652 ± 0.008 inch) 311
311B
311C
311D
311F
312
312B
312C
312D
312D2
312E
312F
313B
313C
313D
313F
314C
314E6I-6590 6I-6477 54.917 ± 0.023 mm (2.1621 ± 0.0009 inch) 119.04 ± 0.20 mm (4.687 ± 0.008 inch) 313D2
315
315B
315C
315D
316F
317
317B
318B
318C
318D
318D2
318E
318F
319
319D
320
320B
320C
320D
320D2
320E
320F
321C
321D
323D
323D2
323F
MD5075
MD5075C
MD5150
MD5150C262-4781 246-5425 64.915 ± 0.025 mm (2.5557 ± 0.0010 inch) 144.84 ± 0.15 mm (5.702 ± 0.006 inch) 538B 384-5482 246-5425 64.915 ± 0.025 mm (2.5557 ± 0.0010 inch) 144.84 ± 0.15 mm (5.702 ± 0.006 inch) 320
320B
320C
322C
323D
324D
325
325B
325C
325D
329D115-7471 112-9951 74.945 ± 0.025 mm (2.9506 ± 0.0010 inch) 158.24 ± 0.20 mm (6.230 ± 0.008 inch) 322
322B
322C
324D
326D115-4931 6I-9597 69.83 ± 0.025 mm (2.7492 ± 0.0010 inch) 149.00 ± 0.20 mm (5.866 ± 0.008 inch) 325D 235-8531 112-9951 74.945 ± 0.025 mm (2.9506 ± 0.0010 inch) 158.24 ± 0.20 mm (6.230 ± 0.008 inch) 328D
330
330B
330C
330D
336D
336D2
336E
340D
340D2
MD6240
MD6290136-3847 6Y-8028 85.000 ± 0.025 mm (3.3465 ± 0.0010 inch) 184.24 ± 0.20 mm (7.254 ± 0.008 inch) 330D 235-8536 6Y-8028 85.000 ± 0.025 mm (3.3465 ± 0.0010 inch) 184.24 ± 0.20 mm (7.254 ± 0.008 inch) 312D2
330C
330D
345B
345C
345D
349E
349D
568
MD6420
MD6420B
MD6420C264-9821 124-9978 104.915 ± 0.025 mm (4.1305 ± 0.0010 inch) 184.24 ± 0.20 mm (7.254 ± 0.008 inch) 345B
345C
345D
349D337-6894 293-8216 104.915 ± 0.025 mm (4.1305 ± 0.0010 inch) 184.24 ± 0.20 mm (7.254 ± 0.008 inch) 350 138-8389 8E-4335 104.915 ± 0.025 mm (4.1305 ± 0.0010 inch) 229.24 ± 0.20 mm (9.025 ± 0.008 inch) 352F 357-7559 293-8216 104.915 ± 0.025 mm (4.1305 ± 0.0010 inch) 184.24 ± 0.20 mm (7.254 ± 0.008 inch) 365B
365C141-2697 6Y-7602 114.945 ± 0.025 mm (4.5254 ± 0.0010 inch) 262.24 ± 0.20 mm (10.324 ± 0.008 inch) 365B
365C278-7284 293-8217 114.945 ± 0.025 mm (4.5254 ± 0.0010 inch) 262.24 ± 0.20 mm (10.324 ± 0.008 inch) 374D
374F
365C
365CL
365B
365BL
MD6640
MD6540
MD6540C352-3735 293-8218 114.945 ± 0.025 mm (4.5254 ± 0.0010 inch) 262.24 ± 0.20 mm (10.324 ± 0.008 inch) 375
5080138-8388 6Y-7602 114.945 ± 0.025 mm (4.5254 ± 0.0010 inch) 262.24 ± 0.20 mm (10.324 ± 0.008 inch) 385B
385C
5090203-4862 202-4902 114.945 ± 0.025 mm (4.5254 ± 0.0010 inch) 262.24 ± 0.20 mm (10.324 ± 0.008 inch) 385B
385C
390D
390F
5090278-7286 352-3740 293-8218 114.945 ± 0.025 mm (4.5254 ± 0.0010 inch) 262.24 ± 0.20 mm (10.324 ± 0.008 inch) 5110B 121-7351 123-1227 149.850 ± 0.025 mm (5.8996 ± 0.0010 inch) 286.0 ± 0.2 mm (11.26 ± 0.01 inch) 6015B 435-4448 123-1227 149.850 ± 0.025 mm (5.8996 ± 0.0010 inch) 286.0 ± 0.2 mm (11.26 ± 0.01 inch) Show/hide tableIllustration 8 g02020097 - Remove the shaft from the idler. If necessary, attach a hoist to help remove the shaft.
- Wash all components to remove debris from the components.
Illustration 2 | g02019155 |
Assembly
- Clean the Duo-Cone seals with isopropyl alcohol. Always use new toric rings for assembly.
Note: Make sure that the toric ring is not twisted on the seal ring.
Show/hide tableIllustration 10 g02020253 - Clean the idler with isopropyl alcohol.
Show/hide table
Illustration 11 g02020334 - Clean the contact surface area for the toric rings in the bearing blocks with isopropyl alcohol.
Show/hide table
Illustration 12 g02020353 - Lightly dampen the lower half of the toric ring with isopropyl alcohol.
Show/hide table
Illustration 13 g02020433 - Use a firm, even pressure on the installation tool to install the Duo-Cone seal in the bearing block. Refer to Table 6 for the correct installation tool.
Show/hide table
Illustration 14 g02020498 - Use a firm, even pressure on the installation tool to install the Duo-Cone seal into the idler assembly. Refer to Table 6 for the correct installation tool.
Show/hide table
Table 6 Duo-Cone Seal Installation Sales Model Seal Installer Seal Height 307
307B
307C
307D
307E2
308C
308D
308E
308E2123-3801 7.7 ± 0.6 mm (0.30 ± 0.02 inch) 311
311B
311C
311D
311F
312
312B
312C
312D
312D2
312E
312F
313B
313C
313D
313F
314C
314E1U-8850 8.8 ± 0.6 mm (0.35 ± 0.02 inch) 313D2(1)
315
315B
315C
315D
316F
317
317B
318B
318C
318D
318D2
318E
318F
319C
319D
320(1)
320B(1)
320C(1)
320D
320D2(1)
320E(1)
320F(1)
321C
321D
323D(1)
323D2(1)
323F
325F
MD5075
MD5075C
MD5150
MD5150C
538B1U-8842 8.8 ± 0.6 mm (0.35 ± 0.02 inch) 320(2)
320B(2)
320C(2)
323D(2)
322
322B
322C
324D
325
325B
325C
325D
326D
329D9U-7537 8.8 ± 0.6 mm (0.35 ± 0.02 inch) 328D
330
330B
330C(3)
330D(3)
336D
336E
336D2
340D
340D2
MD6240
MD62901U-8849 8.8 ± 0.6 mm (0.35 ± 0.02 inch) 330C(4)
330D(4)
345B
345C
345D
349E
349D
350
352F
568
MD6420
MD6420B
MD6420C4C-6206 8.8 ± 0.6 mm (0.35 ± 0.02 inch) 365B
365BL
365C
365CL
374D
374F
375
385B
385C
390D
390F
5080
5090
MD6640
MD6540
MD6540C9U-7538 8.8 ± 0.6 mm (0.35 ± 0.02 inch) 5110B
6015B1U-6436 11.5 ± 1.0 mm (0.45 ± 0.04 inch) Show/hide table(1) 9W-2201 Duo-Cone Seal Gp(2) 109-0885 Duo-Cone Seal Gp(3) 109-0881 Duo-Cone Seal Gp(4) 109-0868 Duo-Cone Seal GpShow/hide tableIllustration 15 g02020523 - Use 8T-0447 Dial Caliper As to check the height of the assembled Duo-Cone seal in the bearing blocks and idler assembly. The seal height should be checked at four 90 degree locations. Refer to Table 6 for the correct seal height.
Note: The difference in height must not exceed
1.0 mm (0.04 inch) . If the assembled height does not meet specifications, the Duo-Cone seals will be reinstalled.Show/hide tableIllustration 16 g02020533 - Make sure that the seal faces are free of all debris. Apply a thin film of 3E-9712 Oil to the entire seal ring face in the idler assembly.
Show/hide table
NOTICE Do not get oil on the rubber toric rings. Oil on the rubber toric rings could lead to a failure.
Show/hide tableIllustration 17 g02020537 - Lightly lubricate the idler bearings with 3E-9712 Oil.
Show/hide table
Illustration 18 g02020577 - Make sure that the seal faces are free of all debris. Apply a thin film of 3E-9712 Oil to the entire seal ring face in the bearing blocks.
Show/hide table
Illustration 19 g02020613 - Carefully install the shaft into the idler assembly.
Note: The shaft may scrape bronze particles from the bearing. The bronze particles will cause failure in the idler.
Show/hide tableIllustration 20 g02020615 - Apply 369-9450 Grease-Petro Gel to the new O-rings to install the new O-rings into the grooves on each end of the shaft.
Note: Always use new O-rings on the ends of the shaft.
Show/hide tableIllustration 21 g02020633 - Place one bearing block on the shaft. Make sure that the spring pin hole in the shaft is aligned with the spring pin hole in the bearing block. Make sure that the marking "R" and the milled surface of the shaft are facing toward the rear of the bearing block when the idler is positioned on the machine.
Note: Always use a new spring pin after disassembly.
Show/hide tableIllustration 22 g02020636 - Install the new spring pin into the bearing block and the shaft.
- Repeat Step 13 and Step 14 to install the other bearing block onto the shaft.
- Spin the bearing blocks and the shaft. The shaft should be spun 20 revolutions in each direction.
- Check the end play. Refer to Table 7 for the correct end play.
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Table 7 Sales Model Idler Group End Play 307
307B115-6336 0.10 mm to 1.20 mm (0.004 inch to 0.050 inch) 307B
307C
307D
308C
308D277-8667 0.1 mm to 1.2 mm (0.004 inch to 0.047 inch) 307E2
308E2422-0868 0.10 mm to 1.20 mm (0.004 inch to 0.050 inch) 433-3881 311
311B
311C
311D
311F
312
312B
312C
312D
312D2
312E
312F
313B
313C
313D
313F
314C
314E4I-7337 0.06 mm to 1.06 mm (0.002 inch to 0.042 inch) 313D2
315
315B
315C
315D
316F
317
317B
318B
318C
318D
318D2
318E
318F
319C
319D
320
320B
320C
320D
320D2
320E
320F
321C
321D
323D
323D2
323F
325F
MD5075
MD5075C
MD5150
MD5150C248-7143 0.26 mm to 1.26 mm (0.010 inch to 0.050 inch) 538B 386-4139 0.26 mm to 1.26 mm (0.010 inch to 0.050 inch) 320
325102-8155 0.26 mm to 1.26 mm (0.010 inch to 0.050 inch) 320B
320C
322C
323D
324D
325B
325C
325D
329D115-3696 0.26 mm to 1.26 mm (0.010 inch to 0.050 inch) 322B
322C
324D
326D115-6337 0.25 mm to 1.15 mm (0.010 inch to 0.045 inch) 322C 194-1130 0.25 mm to 1.15 mm (0.010 inch to 0.045 inch) 325D 239-3690 0.26 mm to 1.26 mm (0.010 inch to 0.050 inch) 328D
330
330B
330C
330D
336D
336D2
336E
340D
340D2
MD6240
MD6290136-2422 0.26 mm to 1.26 mm (0.010 inch to 0.050 inch) 330 102-8152 0.26 mm to 1.26 mm (0.010 inch to 0.050 inch) 330D 239-3691 0.26 mm to 1.26 mm (0.010 inch to 0.050 inch) 312D2
330C
330D
345B
345C
345D
349E
349D
568
MD6420
MD6420B
MD6420C248-7151 0.26 mm to 1.26 mm (0.010 inch to 0.050 inch) 345B
345C
345D
349D297-9264 0.26 mm to 1.26 mm (0.010 inch to 0.050 inch) 350 135-8903 0.26 mm to 1.26 mm (0.010 inch to 0.050 inch) 352F 357-7559 0.26 mm to 1.26 mm (0.010 inch to 0.050 inch) 365B
365C136-2429 248-7256 0.26 mm to 1.26 mm (0.010 inch to 0.050 inch) 374D
374F
365C
365CL
365B
365BL
MD6640
MD6540
MD6540C340-8250 0.41 mm to 1.82 mm (0.016 inch to 0.072 inch) 375
5080135-8904 0.26 mm to 1.26 mm (0.010 inch to 0.050 inch) 390D
390F248-7257 340-8250 0.41 mm to 1.82 mm (0.016 inch to 0.072 inch) 385B
385C
5090194-1157 248-7257 0.41 mm to 1.82 mm (0.016 inch to 0.072 inch) 6015B 430-4139 0.2 mm to 1.2 mm (0.008 inch to 0.047 inch) Note: If the end play does not meet the specifications, the idler must be disassembled.
Show/hide tableIllustration 23 g02020653 - The idlers use a threaded plug in the hub to seal the oil cavity. A compression fitting must be used to perform a pressure test on the assembled idler.
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Illustration 24 g02020655 Show/hide tableNOTICE Do not allow a surge of air to enter the
- Use 170-5664 Test and Fill Cart Gp to evaluate the idler and fill the idler with oil.
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Illustration 25 g02048293 - If 170-5664 Test and Fill Cart Gp is not available, use FT-2724 Pressure Gauge Tool Gp to perform a pressure test on the idler.
- Introduce nitrogen into the oil cavity to a pressure of
138 kPa (20.0 psi) . - Turn the ball valve to the shutoff position.
- Close the pressure gauge.
- Observe the pressure for 10 seconds. A pressure drop of
3.4 kPa (0.50 psi) or less is acceptable. - Add the correct quantity of 3E-9712 Oil to the idler. Refer to Table 8 or Undercarriage Reconditioning Bulletin, SEBF8576, "Idler Oil Fill Volume" for the oil volumes.
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Table 8 Sales Model Idler Group Oil Volumes 307
307B115-6336 60 ± 5 mL (2.0 ± 0.2 oz) 307B
307C
307D
308C
308D277-8667 60 ± 5 mL (2.0 ± 0.2 oz) 307E2
308E2422-0868 60 ± 5 mL (2.0 ± 0.2 oz) 433-3881 311
311B
311C
311D
311F
312
312B
312C
312D
312D2
312E
313B
313C
313D
314C
314E4I-7337 150 ± 15 mL (5.1 ± 0.5 oz) 313D2
315
315B
315C
315D
317
317B
318B
318C
318D
318D2
318E
319C
319D
320
320B
320C
320D
320D2
320E
321C
321D
323D
323D2
323F
325F
MD5075
MD5075C
MD5150
MD5150C248-7143 180 ± 20 mL (6.1 ± 0.7 oz) 538B 386-4139 180 ± 20 mL (6.1 ± 0.7 oz) 320
325102-8155 380 ± 20 mL (12.8 ± 0.7 oz) 320B
320C
322C
323D
324D
325B
325C
325D
329D115-3696 380 ± 20 mL (12.8 ± 0.7 oz) 322B
322C
324D
326D115-6337 260 ± 15 mL (8.8 ± 0.5 oz) 322C 194-1130 260 ± 15 mL (8.8 ± 0.5 oz) 325D 239-3690 380 ± 20 mL (12.8 ± 0.7 oz) 328D
330
330B
330C
330D
336D
336D2
336E
340D
340D2
MD6240
MD6290136-2422 555 ± 30 mL (18.8 ± 1.0 oz) 330 102-8152 555 ± 30 mL (18.8 ± 1.0 oz) 330D 239-3691 555 ± 30 mL (18.8 ± 1.0 oz) 312D2
330C
330D
345B
345C
345D
349E
349D
568
MD6420
MD6420B
MD6420C248-7151 600 ± 30 mL (20.3 ± 1.0 oz) 345B
345C
345D
349D297-9264 500 ± 25 mL (16.9 ± 0.8 oz) 350 135-8903 600 ± 30 mL (20.3 ± 1.0 oz) 352F 357-7559 500 ± 25 mL (16.9 ± 0.8 oz) 365B
365C136-2429 1300 ± 65 mL (44.0 ± 2.2 oz) 365B
365C248-7256 1200 ± 60 mL (40.6 ± 2.0 oz) 374D
374F
365C
365CL
365B
365BL
MD6640
MD6540
MD6540C340-8250 1100 ± 55 mL (37.2 ± 1.9 oz) 375
5080135-8904 1300 ± 65 mL (44.0 ± 2.2 oz) 385B
385C
5090194-1157 1300 ± 65 mL (44.0 ± 2.2 oz) 385B
385C
5090248-7257 1100 ± 55 mL (37.2 ± 1.9 oz) 390D
390F248-7257 340-8242 1100 ± 55 mL (37.2 ± 1.9 oz) 5110B 121-7351 2400 mL (81.2 oz) 6015B 430-4139 2150 mL (73.1 oz)
- Introduce nitrogen into the oil cavity to a pressure of
- Apply 9S-3263 Thread Lock Compound to and install the plug into the oil cavity of the idler.
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Illustration 26 g02021921 - Gently tap the end of the idler shaft to determine if the idler contains oil. If the shaft thumps, the idler contains oil. The idler does not contain oil if there is a ring.
Illustration 9 | g02020233 |