BEARING ASSEMBLY CENTER 1S7577 - Caterpillar

TECHNICAL INFORMATION BULLETIN September 8, 2004
ASPHALT PAVERS AP-1055B (ABB526-Up)
AP-1055B (A3P1-Up)
BG-2455C (ACM282-Up)
BG-2455C (B2G1-Up)
AP-1000B (7HN351-Up)
AP-1000B (AGP1-Up)
BG-260C (8GN583-Up)
BG-260C (BYG1-Up)
AP-655 (CDG251-Up)
AP-655 (AYP1-Up)
BG-2255C (B9G1-Up)
BG-2255C (CKR1-Up)
Component Code(s) 4050SUBJECT: TRACK DRIVE PLANETARY FAILURES ON THE ASPHALT PAVERS
PROBLEM:
Planetary gear thrust washers in the third (final) planet stage can fail under load. Pieces of these thrust washers can enter the mesh causing gear tooth failure. The failure can quickly expand resulting in major damage.
Planetary Part Numbers
190-6344
190-6345
219-1962
SOLUTION:
Major damage can be avoided by early detection. Removing and examining the oil plug can detect a failed thrust washer. The plug has a magnet for trapping ferrous particles. Pieces of a failed thrust washer collect on the magnet in large flakes.
The magnetic plug also traps break-in wear particles. They are fine, powdery particles and are not indicative of a pending planetary failure.
If large flakes are found on the plug, do not disassemble the planetary. Call Caterpillar Global Paving Minneapolis for instructions on how to proceed.
Craig Gustin (763) 493-1378
Dave King (763) 493-1480
Steve Brandenburger (763) 493-1379
COPYRIGHT 2004 CATERPILLAR
ALL RIGHTS RESERVED