Alternator Upgrades

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Many different Datsun alternators and alternators from other makes can easily be fitted to the Datsun 1200. If you are running high-power headlights, off-road lighting systems, or high-power stereo gear, using a high output alternator is called for. Or, if you need to replace the 1200 alternator and have free or inexpensive access to different alternators, you might consider a swap. Lastly you might have a bad Voltage regulator, and by swapping to an internally-regulated alternator reliability increases since these use a solid-state (no moving parts) regulator.

There are two major considerations in a swap:

• Physical swap. How does it bolt to the A12 engine?
• Electrical swap. How will the new alternator be connected to the wiring?

Physical Specifications

Alternator Comparison & swap info

Stock Hitachi LT-135 35A

• Weight: 8.4 pounds with pulley
• Front flange (bolt ears): 13mm thick
• Distance between engine-side mounting ears: 80mm
• Distance between Adjustment bolt and mount bolt: 156mm
• 10.5mm diameter mount holes
• Diameter of body: ?
• Fan belt center: 29mm from front bolt face
• Pulley diameter: 69mm
• Adjustment bolt: Flange threaded for M8x1.25 bolt

Electrical Connector

Datsun 1200 uses the typical 1970s Hitachi T-shaped connector:

• Field
• Nuetral point

Other alternators use different connectors. Since the LT-135 uses spade connectors, wiring should be pretty simple.

Hitachi LT-150

Hitachi LT-150 looks like it will bolt right in place of stock LT-135.

• 9.6 pounds: Bosch AL237X 50A 1974-1978

Hitachi 50 Amp (Bosch AL237X)

• CHEVROLET LUV PICKUP (1981 - 1982)
• ISUZU PICKUP (1981 - 1986)
• ISUZU PICKUP NORMAL CAB 1987
• ISUZU TROOPER (1984 - 1985)
• DATSUN 200SX 1977
• DATSUN 610 (1974 - 1976)
• DATSUN 710 (1975 - 1977)
• DATSUN B210 (1975 - 1977)
• DATSUN F10 (1976 - 1978)
• Fits same as Bosch #AL241X 60AMP

Internal Regulator Alternator

Sunny Truck

23100-B9810 Mitsubishi A1T22971, 35A internally regulated is a direct physical replacement for the original (small) B110 alternator. It is wired differently however.

Nissan 23100-B8910
Mitsubishi Electric Corporation A1T22971
12V 35A 1X23
LS wiring (see Hitachi LR Alternator Wiring)

CAUTION: T-connector is LS wired, not FN wired

Also see Alternator Part Numbers

keywords: dynamo, generator, ダイナモ

Hitachi LR

Newer Datsuns from about 1978 came with an alternator with internal-regulator, the LR150/LR160, including fitment on newer A-series engines.

See main article: Hitachi LR Alternator

More Swaps

• Ford Falcon EA Alternator. Also see: EA falcon mounting diagram
• Bosch of Australia internal-regulated Alternator
• Chrysler alternator upgrade on Yahoo! Clubs Datsun 210

Hardware

• Alternator tension rod makes adjustments easy