Usage:
May 2, 2000
(Revised July 2001)
A-105
before
or
after failure |
PRODUCT SUPPORT PROGRAM FOR INSPECTING AND INSTALLING NEW PINION BEARINGS ON CERTAIN CH65B, CH65C, CH70, CH75, CH75C, CH75D, CH85C, AND CH85D CHALLENGER TRACTORS |
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4091 |
PS40163
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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.
NOTE: This Revised Service Letter replaces the May 2, 2000 Service Letter. Changes have been made to the Title and the Termination Date.
TERMINATION DATE
May 31, 2002PROBLEM
Certain Challenger CH65, CH70, CH75, and CH85 Tractors may experience problems with final drive pinion tooth failures or pinion bearing failures due to incorrect bearing preload. A new bearing preload procedure was announced earlier. The affected tractors can be inspected for damage, replacing parts as required.AFFECTED PRODUCT
Model Identification NumberCH65B 7YC614, 642, 908, 913, 938, 945, 948, 953, 957, 959-960, 970, 1255, 1436-1437, 1493, 1554, 1593, 1618, 1631, 1664, 1670, 1672, 1690, 1752, 1778, 1901, 1907, 1915-1916, 1923, 1925, 1939, 1950, 1954, 1956, 1958, 1961, 1965, 1997, 2006-2007, 2025, 2028, 2030-2031, 2034, 2038, 2040, 2064, 2086-2088, 2091, 2095, 2097, 2102, 2118, 2127-2132, 2139, 2148-2149, 2153, 2166, 2168
CH65C 2ZJ237, 240, 244-245, 271, 273, 285, 288-289, 331, 367, 372, 374, 506-508, 512-518, 558, 573, 585-588, 602-604, 623-624, 635, 657, 1685, 1702, 1743, 1746, 1808, 1875, 1967, 2005, 2007, 2027-2028, 2068, 2141, 2146, 2309, 2387
CH70C 2YL238, 240, 250-251, 255-256, 258
CH75 4CJ570-571, 596
CH75C 4KK142, 188-189, 194, 243, 248, 253, 282, 291-292, 308, 339, 356, 359, 365, 372-373, 528-532, 538-547, 553, 593, 624-632, 634, 659-660, 662-663, 666-667, 669-672, 713-714, 801-803, 833, 1867-1868, 1870-1871, 1914, 1916-1918, 1920-1921, 1930, 2018-2020, 2063-2065, 2261-2264, 2268-2269
CH75D 5AR221-224, 318-319, 321
CH85C 9TK1427
CH85D 4GR491
PARTS NEEDED
4 - 8T0759 CONE-RLR BRG4 - 8T0760 CUP-RLR BRG
2 - 3W5636 GEAR - PINION (As Required)
2 - 1384126 SHIM PACK KIT
ACTION REQUIRED
References:B) Disassembly & Assembly (Challenger 65B & 75 Agricultural Tractors, Power Train) Service Manual Module; Form No: SENR4973
C) Disassembly & Assembly (Challenger 65C, 70C, 75C & 85C Agricultural Tractors Power Train) Service Manual Module; Form No: SENR5263-01
D) Disassembly & Assembly (Challenger 65D, Challenger 75D And Challenger 85D Agricultural Tractors Power Train) Service Manual Module; Form No: SENR9439
E) "Improved Final Drive Pinion Bearing Setting Procedure Used and New Shim Pack Kit Available", Service Magazine, May 4, 1998, p. 6
2) Disassemble the final drive pinions and bearings.
3) Inspect the pinions for damage. If significant damage is noted, replace the pinion gear. If no significant damage is noted, swap the pinions side-to-side.
4) Install new pinion bearings. Shim to the procedure outlined in the referenced Service Magazine article.
5) Reassemble the final drives.
6) Reinstall the drivers and belts.
SERVICE CLAIM ALLOWANCES
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