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Caterpillar Alternator Fits 941, D3, 621, 623 & More (20 Amp)

Caterpillar Alternator Fits 941, D3, 621, 623 & More (20 Amp)

SKU:400-20009

Regular price £412.44 GBP
Regular price £458.64 GBP Sale price £412.44 GBP
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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).

DIRECT FIT: Replaces Arrowhead APL0001 — no modification required on the machines listed below.

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.
Fast dispatch from the UK.

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Shipping calculated at checkout. Free shipping over £150. Terms apply