1006656 Diode A Fits Caterpillar Models

One New Aftermarket Replacement Alternator Diode Assembly for Caterpillar (Cat) Equipment and Engines

This aftermarket replacement diode assembly (Diode AS-Alternator) installs in the alternator charging system on a wide range of Caterpillar motor graders, engines, and related equipment. The diode rectifies AC current produced by the alternator into DC current to charge the battery and power the machine's electrical system. Replacing a failed diode restores proper alternator output and prevents undercharging or electrical system faults.

Compatible Models

Caterpillar Motor Graders: 12G, 14G, 16G, 120G, 130G, 140G, 160G, 12H ES, 12H NA, 14H NA, 16H NA, 120H, 120H ES, 120H NA, 135H NA, 140H, 140H ES, 140H NA, 143H, 160H, 160H ES, 160H NA, 163H NA

Caterpillar Engines: 3114, 3116, 3126, 3126B, 3176B

Note: The full compatible model list may be broader than shown above. Verify your OEM part number 1006656 before ordering to confirm fitment.

Replaces Part Number(s):

1006656

New aftermarket replacement part - not remanufactured, not used.