| Item | Part No. | Part Name | Qty | Serial No. |
| 600-825-9330 | ALTERNATOR A. (90A) | 12521- | ||
| THE NIKKO DENKI PART NUMBER IS THAT KD IS REMOVED FROM KOMATSU PART NUMBER LISTED BELOW. | ||||
| 1 | KD0-35100-0310 | ROTOR ASS'Y | 12521- | |
| 2 | KD1-33923-0890 | COLLAR | 12521- | |
| 3 | KD1-35923-0030 | COLLAR | 12521- | |
| 4 | KD0-09201-0770 | BEARING,BALL | 12521- | |
| 5 | KD0-35926-0080 | RETAINER | 12521- | |
| 6 | KD0-35951-0080 | PACKING | 12521- | |
| 7 | KD1-33926-0660 | RETAINER | 12521- | |
| 8 | KD0-09201-0760 | BEARING,BALL | 12521- | |
| 9 | KD1-33926-0790 | RETAINER | 12521- | |
| 10 | KD0-35200-0320 | STATOR ASS'Y | 12521- | |
| 11 | KD0-35300-0200 | BRACKET ASS'Y,FRONT | 12521- | |
| 12 | KD0-0083-08802 | BOLT | 12521- | |
| 13 | KD0-35411-0950 | PULLEY | 12521- | |
| 14 | KD0-35421-0190 | FAN | 12521- | |
| 15 | KD1-0335-22002 | WASHER,SPRING | 12521- | |
| 16 | KD0-0280-22022 | NUT | 12521- | |
| 17 | KD1-35921-0010 | WASHER | 12521- | |
| 18 | KD0-35120-0250 | FIELD COIL ASS'Y | 12521- | |
| KD0-35700-0760 | BRACKET ASS'Y,REAR | 12521- | ||
| 19 | KD0-35710-0890 | BRACKET,REAR | 12521- | |
| 20 | KD0-35730-0162 | RECTIFIER ASS'Y | 12521- | |
| 21 | KD0-35943-0210 | BUSH,INSULATE | 12521- | |
| 22 | KD0-33902-0090 | NUT | 12521- | |
| 23 | KD0-33902-0080 | NUT | 12521- | |
| 24 | KD1-0020-06452 | SCREW | 12521- | |
| 25 | KD1-0330-06012 | WASHER | 12521- | |
| 26 | KD1-0335-06002 | WASHER,SPRING | 12521- | |
| 27 | KD0-0080-06142 | BOLT | 12521- | |
| 28 | KD0-35719-0180 | REGULATOR ASS'Y | 12521- |