Caterpillar Alternator Fits 941, D3, 621, 623 & More (20 Amp)
Caterpillar Alternator Fits 941, D3, 621, 623 & More (20 Amp)
SKU:400-20009
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Caterpillar Alternator
Fits 941, D3, 621, 623 & More (20 Amp)
Keep your Caterpillar running with this 20 Amp 24V replacement alternator. Designed as a direct-fit replacement for the track loader, tractor listed below, it delivers reliable charging for standard and accessory electrical loads.
This unit features an internal regulator (IR).
Key Features
- ✔High Capacity: 20 Amps of charging output.
- ✔Direct Replacement: Replaces Arrowhead APL0001.
- ✔Robust Design: IR regulator.
- ✔Quality Assured: New aftermarket unit, 12 month warranty.
Technical Specs
| Voltage: | 24 Volts |
| Amperage: | 20 Amps |
| Regulator: | Internal (IR) |
| SKU Reference: | 400-20009 |
Vehicle Fitment Guide
| Make | Equipment Type | Models | Years |
|---|---|---|---|
| Caterpillar | Track Loader | 941 | 1972 |
| Caterpillar | Tractor | D3 | 1987 |
| Caterpillar | Scraper | 621, 623 | 1969–1974 |
| Caterpillar | Track Loader | 941, 941B, 951, 951B, 955K, 955L, 977K, 977L, 983 | 1969–1978 |
| Caterpillar | Track Tractor | D3, D4D, D5, D6C, D6D, D7F, D7G, D8K, D9H | 1969–1978 |
| Caterpillar | Tractors - Industrial | RM241, RM263, T224, T225, T226 | 1971–1979 |
| Caterpillar | Wheel Loaders | 920, 930, 950, 966C, 980, 980B, 980C, 988, 988B | 1969–1978 |
| Caterpillar | Wheel Tractor Dozers | 814, 814B, 824B, 824C | 1969–1978 |
OEM Part Number Cross Reference
| Arrowhead | APL0001 |
| Cargo | 110427 |
| Case | A44440, A44794, A47434, R34730 |
| Caterpillar | 2P1204, 2P1698, 2P5113, 2P7836, 5C8661, 6N5468, 9S4870 |
| J&N Electrical Products | 400-20000, 400-20009 |
| Lester | 7331 |
| NSA | ALT-0130 |
| Prestolite | 51-178, 51-212, ANB6002, ANB6004, ANB7002, ANB7003, ANB7004 |
| Unipoint | ALT-0130 |
| WAI | 20-601 |
Frequently Asked Questions
Will this fit my Caterpillar 941?
Yes — the 941 appears in the fitment guide above. Check your existing part number against the cross reference table to confirm.
Is this a 20 Amp alternator?
Yes, this is a 20 Amp 24V unit with an IR regulator.
Is this new or remanufactured?
This is a brand new aftermarket unit — not a remanufactured core.
Note: Please verify your machine's serial number or existing part number to ensure compatibility.
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