This alternator is a direct replacement for the original unit fitted to equipment powered by the Kubota RX502 and WG2503 engines, including AUSA D250 mini dumpers, Giant 6001T loaders and Schaffer 3360 compact wheel loaders. It supersedes Kubota part number 16404-64012 and Denso 101211-1030, and is manufactured to OEM specifications for fit, form and function.
The unit is rated 12-volt, 40-amp with clockwise rotation, an internal regulator (IR) at the 12:00 clock position and an internal fan (IF), in the Denso design used as original equipment. It uses a single-groove (V1) solid pulley measuring 69mm OD, designed to run on a 13mm belt.
Key Features
- 12-volt, 40-amp output
- Clockwise (CW) rotation, Denso design
- Internal regulator (IR) at 12:00, internal fan (IF)
- Single-groove V1 solid pulley, 69mm OD
- Fits Kubota RX502 and WG2503 powered equipment
Technical Specs
| Specification |
Detail |
| Voltage |
12V |
| Amperage |
40A |
| Rotation |
CW (clockwise) |
| Manufacturer |
Denso |
| Pulley Type |
V1 (single groove, solid), 69mm OD |
| Belt Width |
13mm |
| Fan Type |
IF (internal) |
| Regulator Type |
IR (internal), clock 12:00 |
Vehicle Fitment Guide
Years shown are the overall coverage span for this part. Please confirm against the OEM part number on your original unit before ordering.
| Make & Model |
Years |
| Kubota RX502 Engine Applications |
1980-1999 |
| Kubota WG2503 Industrial Engine (61.7 hp) |
Not specified |
| AUSA D250 Mini Dumper (Kubota RX502 engine) |
Not specified |
| Giant 6001T Loader (Kubota RX502 engine) |
Not specified |
| Schaffer 3360 Compact Wheel Loader (Kubota RX502 engine) |
Not specified |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 16404-64012, 16404-64013, KEARA16404 |
Kubota |
| 101211-1030, 101211-1031 |
Denso |
| AND0540 |
Arrowhead |
| 12807 |
Lester |
| LRA03551 |
Lucas Electrical |
| 400-52143 |
J&N Electrical Products |
Frequently Asked Questions
Will this fit my Kubota RX502-powered machine without modification?
Yes, it is built to OEM specifications and bolts directly to the standard Kubota RX502 engine mounting points.
What's included?
The alternator unit only.
How can I tell my alternator has failed?
Signs include a charge warning light, a battery that will not hold charge, dimming lights, or unusual noise from the unit.
How do I confirm this is the right alternator?
Check the number stamped on your original unit against the table above - Kubota 16404-64012 or Denso 101211-1030 are the most common.
What voltage and output does this alternator have?
12-volt, 40-amp, with an internal regulator (IR) and internal fan (IF).
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
