135-Amp Alternator for Case, John Deere & New Holland Equipment

Author : Danny walker | Published On : 25 Sep 2026

Keeping your farm equipment charged and running isn't optional—it's the difference between a productive day in the field and an expensive breakdown. This 12-volt, 135-amp alternator is built for select Case IH, John Deere, and New Holland combines, cotton pickers, sprayers, and tractors. It converts engine power into electricity, recharging the battery and running everything from lights to cab electronics while the machine works.

When an alternator starts failing, you'll usually notice warning signs first: slow cranking, dimming lights, warning lights on the dash, or a battery that keeps dying no matter how often you charge it.

Key specs to check before buying: 12V, 135A output, internal regulator (12:00 clock position), external fan, 7/16-14 stud, negative polarity, and about 14.85 lbs.

This unit cross-references to Case 125849A1, John Deere RE36268, SE501349, TY6773, TY6795, and New Holland 86994128—plus Bosch, Iskra, and Iskra Sales equivalents. It fits a wide lineup, including Case combines (2144–7088 series), cotton pickers (2155, 2555, CPX420), sprayers and floaters (FLX and SPX series), STX and MX tractors, John Deere skidders and loaders, and New Holland TG/TJ tractors.

Before ordering, don't just match the part number—confirm voltage, amperage, mounting, and your exact model and engine year.

For installation: disconnect the battery, inspect wiring and grounds, mount securely, check belt tension, and test charging output afterward. Routine belt and connection checks go a long way toward preventing future charging issues.

Denparts.ca makes it easy to find the right replacement alternator with detailed specs, cross-reference numbers, and application listings for your exact machine.