| Item | Part No. | Part Name | Qty | Serial No. |
| 636 878 C91 | IDLER ASSEMBLY, TOP | | Ser Num- |
| 1 | 636 879 C1 | BODY, IDLER | | Ser Num- |
| 2 | 636 880 C1 | SHAFT, IDLER | | Ser Num- |
| 3 | 1298 001 H91 | BEARING, TAPERED ROLLER | | Ser Num- |
| | | | |
| | OR | | |
| | | | |
| 625 741 C91 | BEARING ASSEMBLY, TAPERED ROLLER | | Ser Num- |
| 625 742 C91 | CONE, BEARING | | Ser Num- |
| 625 743 C1 | CUP, BEARING | | Ser Num- |
| 4 | 1298 009 H91 | BEARING, TAPERED ROLLER | | Ser Num- |
| | | | |
| | OR | | |
| | | | |
| 631 169 C91 | BEARING ASSEMBLY, TAPERED ROLLER | | Ser Num- |
| 631 170 C91 | CONE, BEARING | | Ser Num- |
| 376 463 R1 | CUP, BEARING | | Ser Num- |
| 5 | 327 068 R1 | RING, RETAINING | | Ser Num- |
| 6 | 636 885 C1 | SPACER, BEARING - 0.088IN | | Ser Num- |
| 636 886 C1 | SPACER, BEARING - 0.091IN | | Ser Num- |
| 636 887 C1 | SPACER, BEARING - 0.094IN | | Ser Num- |
| 7 | 317 923 R1 | SEAL, RING | | Ser Num- |
| 8 | 636 884 C1 | COVER, IDLER | | Ser Num- |
| 24 840 R1 | BOLT, HEX - 3/8NCx1 | | Ser Num- |
| 115 093 | WASHER, LOCK - 3/8 | | Ser Num- |
| 9 | 444 660 | PLUG, DRAIN | | Ser Num- |
| 10 | 1208 549 H92 | KIT, METAL FACED SEAL | | Ser Num- |
| 11 | 636 881 C2 | RETAINER, SEAL | | Ser Num- |
| 12 | 25 566 R1 | PIN, SPRING - 1/4x3 | | Ser Num- |
| 13 | 384 377 R1 | SEAL, RING | | Ser Num- |
