Alternator for Komatsu FD20 & FD30 Forklifts 1988-On - 12V 45A
Alternator for Komatsu FD20 & FD30 Forklifts 1988-On - 12V 45A
SKU:400-52344
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Alternator for Komatsu FD20 & FD30 Forklifts
Fits Komatsu FD20/FD30 Lift Trucks with the 4D95 Engine, 1988 Onwards · 12V 45A IR/IF
This alternator is a direct replacement for Komatsu fork lift trucks in the FD20 and FD30 ranges - including the FD20-11, FD20DC, FD20DC-11, FD20SDC-11, FD20ST-11, FD20T-11 and FD20WC-11 built from 1988 onwards with the Komatsu 4D95 engine, plus the FD30 and FD30-11. It is built to OEM specifications for fit, form and function, and is rated at 12 volts with a 45 amp output in the IR/IF (internal regulator, internal fan) configuration.
The unit is manufactured by Denso and fitted with a single-groove V pulley (75mm OD), matching the original equipment specification so no modification, drilling or bracket changes are needed for installation. It replaces Denso 100211-4490 and Komatsu 600-821-2350, and clockwise (CW) rotation matches the standard Komatsu forklift drive belt layout.
Key Features
- 12-Volt, 45 Amp output
- IR/IF configuration (Internal Regulator / Internal Fan)
- Clockwise (CW) rotation
- Denso-manufactured unit
- Single-groove V pulley, 75mm OD
- Direct fit for Komatsu 4D95-engined FD20/FD30 lift trucks
Technical Specs
| Specification | Detail |
|---|---|
| Voltage | 12V |
| Rotation | CW |
| Amperage | 45A |
| Regulator Type | IR (Internal Regulator) |
| Fan Type | IF (Internal Fan) |
| Pulley Type | V-Groove, 75mm OD |
| Engine Application | Komatsu 4D95 |
| Manufacturer | Denso |
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 |
|---|---|
| Komatsu FD20-11 Fork Lift Truck (4D95 engine) | 1988-On |
| Komatsu FD20DC-11 Fork Lift Truck (4D95 engine) | 1988-On |
| Komatsu FD20SDC-11 Fork Lift Truck (4D95 engine) | 1988-On |
| Komatsu FD20ST-11 Fork Lift Truck (4D95 engine) | 1988-On |
| Komatsu FD20T-11 Fork Lift Truck (4D95 engine) | 1988-On |
| Komatsu FD20WC-11 Fork Lift Truck (4D95 engine) | 1988-On |
| Komatsu FD20 & FD20DC Fork Lift Truck | All Years |
| Komatsu FD30 & FD30-11 Fork Lift Truck | All Years |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number | Manufacturer / Brand |
|---|---|
| 100211-4490 | Denso |
| ND100211-4490 | Denso / AC Delco |
| 600-821-2350 | Komatsu |
| AND0235 | AC Delco |
Frequently Asked Questions
Will this alternator fit my Komatsu forklift without modification?
Yes, this is a direct OEM-fit replacement built to the original Denso specification, including mounting points, drive rotation and pulley size, so no modification is required for installation - it should bolt straight into place using your existing brackets and belt.
What's included?
You will receive one complete alternator unit, ready to fit. Wiring loom, pulley and drive belt from your existing installation should be reused as normal.
How can I tell my old alternator has failed?
Common signs include a battery warning light on the dash, dimming or flickering lights, a battery that will not hold charge, or an unusual grinding or whining noise coming from the alternator pulley or bearing while the engine is running.
My Komatsu model isn't listed - will it still fit?
Check the number stamped on your original unit against the cross reference table above; this alternator replaces Denso 100211-4490 and Komatsu 600-821-2350 across the 4D95-engined lift truck range.
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