PRODUCT SUPPORT PROGRAM FOR REPLACING WHEEL BEARINGS USING AN IMPROVED PRELOAD PROCEDURE ON CERTAIN 12M 3, 120M 2, 140M, 140M 3, AND 160M MOTOR GRADERS
Usage:
TEBE8985-02
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| 23Apr2019 |
| (Revised 21May2019) |
D500
E330
E332
E337
E339
E347
N030
N065
N070
N071
N072
N074
N075
N079
N170
N171
N172
N173
N174
N175
N176
N178
N182
N186
N187
N18B
E330
E332
E337
E339
E347
N030
N065
N070
N071
N072
N074
N075
N079
N170
N171
N172
N173
N174
N175
N176
N178
N182
N186
N187
N18B
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| After Failure Only (Limited distribution) | PRODUCT SUPPORT PROGRAM FOR REPLACING WHEEL BEARINGS USING AN IMPROVED PRELOAD PROCEDURE ON CERTAIN 12M 3, 120M 2, 140M, 140M 3, AND 160M MOTOR GRADERS |
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| 4267 4251 4303 4305 5225 3020 3282 | PS54037 |
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| NOTE: | Caterpillar’s obligations under this Service Letter are subject to, and shall not apply in contravention of, the laws, rules, regulations, directives, ordinances, orders, or statutes of the United States, or of any other applicable jurisdiction, without recourse or liability with respect to Caterpillar. |
| NOTE: | This Program can only be administered after a failure occurs. The decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS54037" as the Part Number and "7755" as the Group Number. Use "96" as the Warranty Claim Description Code and use "Z" as the SIMS Description Code. |
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| NOTE: | The information supplied in this service letter may not be valid after the termination date of this program. Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst. |
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| NOTE: | This Revised Service Letter replaces the 23Apr2019 (Revised 20May2019) Service Letter. Changes have been made to the Parts Needed. |
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TERMINATION DATE |
| 30Apr2021 |
PROBLEM
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| The existing wheel bearings can fail on certain M Series Motor Graders. If the existing wheel bearings fail, they can generate debris and cause other lower powertrain resultant damage mentioned below. Signs of failure include: 1. Oil leakage from duo cone seal due to severe loss of bearing preload 2. Wheel spindle has loose endplay when tires lifted off ground 3. Abnormal noise coming from wheel during operation If failure is suspected, please collect tandem SOS oil sample before beginning teardown and check tandem magnetic plug for debris. However, it is common for material to build up in the bottom of the tandem housing. A failure would be indicated by the symptoms listed above and an indication of contaminated tandem oil. Refer to the Service Manual if/as necessary. If failure is confirmed by the above symptoms, schedule a repair at first available opportunity to avoid resultant damage. Potential resultant damage may include damage to the following components (in order of likelihood): 1. Sprockets 2. Spindles 3. Chains 4. Brake housings 5. Final drive outboard bearings |
AFFECTED PRODUCT
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| Model | Identification Number |
| *******Group 1******* | |
| 120M 2 | M9C00535, 542, 600 |
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| *******Group 2******* | |
| 140M | B9D04615, 4695, 4697, 4733-4734, 4780-4781, 4783-4785, 4808-4810 D9G01527-01538, 1540-1553, 1560, 1562-1566, 1568-1572, 1581-1583, 1586-1588, 1602-1607 |
| 160M | B9E01044-01046, 1065-1081, 1087, 1090-1091, 1094-1096, 1099-1100, 1113-1114, 1122-1128, 1132-1135, 1137-1140, 1142-1143, 1146-1147, 1149-1151 D9T01365-01375, 1377-1387, 1389-1391, 1393-1397, 1399-1403, 1406-1420, 1422-1434, 1436-1439, 1441, 1443, 1445-1447, 1449, 1453-1454 |
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| *******Group 3******* | |
| 12M 3 | N9B00122-00126, 143, 160, 162, 177, 185, 192-193, 197-199, 204, 213, 221-224, 236-241, 244, 246, 265, 270, 282-284, 292, 303 N9F00177, 179-183, 191-193, 209-212, 229-231, 233, 293-300, 320, 344, 353, 355, 364-369, 373-375, 377, 384-385, 403-407, 409, 414, 422-423, 425-427, 437-440, 446-449, 477-479, 487-489, 494, 496-497, 502-508, 515-516, 519, 547, 555-556 |
| 140M 3 | N9D00246, 248, 294, 297, 305, 330, 352, 362, 365-366, 369, 371, 374, 418, 490, 562, 599, 615, 617, 622, 635, 644-645 N9J00269, 299-300, 304-305, 325, 366, 383, 434-435 |
PARTS NEEDED
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Qty |
Part Number | Description |
| *******Group 1******* | ||
| 4 | 2G9789 | GASKET |
| 4 | 4B7270 | BEARING-CONE |
| 4 | 4S5879 | SEAL-O-RING |
| 4 | 5K5288 | SEAL GP-DUO CONE |
| 8 | 6B3223 | BEARING-CUP |
| 12 | 6V3303 | BOLT |
| 4 | 7D8437 | CONE-ROLLER BRG |
| 16 | 7D8439 | SHIM |
| 4 | 7D8441 | SHIM |
| 16 | 9D7047 | SHIM |
| 4 | 2204335 | SEAL-BRAKE |
| 4 | 2204336 | SEAL-BRAKE |
| 8 | 2504091 | GASKET |
| 28 | 2849557 | PLATE (After Failure, if needed) |
| 24 | 3510925 | DISC-FRICTION (After Failure, if needed) |
| In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 10% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer. |
||
| *******Group 2******* | ||
| 4 | 3D2981 | GASKET |
| 4 | 4B7270 | BEARING-CONE |
| 4 | 4S5879 | SEAL-O-RING |
| 4 | 5K5288 | SEAL GP-DUO CONE |
| 8 | 6B3223 | BEARING-CUP |
| 12 | 6V3303 | BOLT |
| 4 | 7D8437 | CONE-ROLLER BRG |
| 16 | 7D8439 | SHIM |
| 4 | 7D8441 | SHIM |
| 16 | 9D7047 | SHIM |
| 4 | 2204335 | SEAL-BRAKE |
| 4 | 2204336 | SEAL-BRAKE |
| 8 | 2504091 | GASKET |
| 28 | 2849557 | PLATE (After Failure, if needed) |
| 24 | 3510925 | DISC-FRICTION (After Failure, if needed) |
| In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 10% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer. |
||
| *******Group 3******* | ||
| 4 | 3D2981 | GASKET |
| 4 | 4B7270 | BEARING-CONE |
| 4 | 4S5879 | SEAL-O-RING |
| 4 | 5K5288 | SEAL GP-DUO CONE |
| 8 | 6B3223 | BEARING-CUP |
| 12 | 6V3303 | BOLT |
| 4 | 7D8437 | CONE-ROLLER BRG |
| 16 | 7D8439 | SHIM |
| 4 | 7D8441 | SHIM |
| 16 | 9D7047 | SHIM |
| 4 | 1516251 | SEAL-D-RING |
| 4 | 1637234 | SEAL-D RING |
| 8 | 2504091 | GASKET |
| 28 | 2849557 | PLATE (After Failure, if needed) |
| 24 | 3510925 | DISC-FRICTION (After Failure, if needed) |
| In order to allow equitable parts availability to all participating dealers, please limit your initial parts order to not exceed 10% of dealership population. This is an initial order recommendation only, and the ultimate responsibility for ordering the total number of parts needed to satisfy the program lies with the dealer. |
||
ACTION REQUIRED
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| A new wheel bearing preload procedure, previously introduced with service magazine M0083889, with improved preload setting, and improved assembly process, is now available. Refer to IMAGE 1 for the Assembly procedure for each model: If any one of the four rear wheel groups fail or show severe damage to components, inspect all four wheel groups for any resultant damage. Refer to reuse & salvage guidelines before replacing parts not listed above. Flush and clean the tandem housing to remove any residual contaminants. If the wheel bearing failure is severe and contamination was present in tandem oil during operation for some time, then remove tandems and final drive sprockets, and inspect final drive outboard bearings for damage. If the 6V-2449 bearing is found to show signs of failure or beginning to fail please submit a CPI feedback and include clear pictures of the condition of the outboard bearing cone and cup, the thickness of the ?original? shim pack from Factory Assembly, along with any other component damage that is found. For questions, please contact dealer technical communicator (TC). It is common for the bearing to mill into the sprocket after preload is lost. The amount of wear is limited by the available shim pack height to properly maintain preload. To determine reusability, follow these steps. 1. Check the wear on the sprocket. If the sprocket width (D) in IMAGE 2 is greater than minimum reuse spec provided in IMAGE 3, then the parts are OK to reuse if bearing preload can properly be set per step 2. *NOTE: The minimum width spec is based on a maximum allowable wear of 0.5 mm before chain misalignment is a concern. 2. Attempt to reset the bearing preload following process in assembly guide. Reset the preload only if the measured gap between retainer and spindle (dimension X) is greater than 0.050 mm (0.002 inch). If the gap (dimension X) is less than 0.050 mm, sprocket will need to be replaced or reworked per REHS8752. For rework and salvage instruction, please refer to the following publications: REHS8752 ?Instructions For Reworking The Tandem Drive Sprockets on Certain 12M, 120M, and 140M Motor Graders? SEBF9385, ?Thermal Spray Procedures for Motor Grader Spindle (OD)? *NOTE: for spindles, to determine reuse or if thermal spray is needed, refer to IMAGE 4. If it is necessary to inspect the Final Drive Shaft, and it is found to be damaged, the thermal spray procedure is not recommended. Replace shaft if damaged and outboard bearing journal does not meet OD spec in IMAGE 5 after light polishing. |
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SERVICE CLAIM ALLOWANCES
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