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[Datsun 1200 encyclopedia]


From Datsun 1200 Club

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Categories: Charging System | Engine Electrical System

Datsun 1200 was fitted with a Mitsubishi or Hitachi alternator, which were a lightweight (8.4 pound) 35 AMP alternator. These alternators will usually last 10-15 years or more than 100,000 miles before maintenance is required. The only normal maintenance is to replace the brushes when the dash light starts flickering. The alternator uses an external #Voltage Regulator.



Hitachi Alternator LT-135 (35 AMP model) was used on all Datsun 1200s up into the 1980s. Mitsubishi was the second source.

23630.jpgAlbum 23630


Strict interchange: Alternator (35 AMP model) 
B110 1970-1973
B120 1971-1985
B210 1974 USA standard duty
 510 1968-early 1971 USA
 521 1969-early 1971 USA
 620 1973-1979 USA

Loose interchange: Many kinds of alternators can be used with some mods (different length fan belt or mounting arm). May require a wiring modification.


Datsun 1200 from 1974 (with mid-distributor A12) came with various alternators.

Hitachi LR135

Japan-market Datsun 1200s from October 1981 came with a 35A alternator with integral regulator. It is a DIRECT BOLT-ON for the stock 1200 35A alternator, and requires a one-wire connection (modified wiring). You can unplug or discard any external voltage regulator. Also used by Australia N10 E13 and other Nissan.

* Nissan, Mazda, Subaru
* 1981-1989 JPN Sunny Truck 1200
* AUS Nissan Pulsar N10
* AUS Nissan Patrol (with vacuum pump)
* 1978-1979 USA Datsun 620 pickup
* 1980 USA Datsun 720 pickup
See Main Article: LR135

Lucas 15AC

Australian assembled 120Y have a Lucas alternator. Lucas 15-A.C.


Lucas AS123

Big-flange alternators were used in South Africa on the B140.



Late model Datsun in Australia use a Bosch internally-regulated alternator.



Datsun 1200 mounted the alternator on the left or right side.

Early A-series engines (1966-1973) mount the alternator down low on the left side of the engine, under the intake manifold as shown in this photo:

1974-up engines mount it high on the right side of the engine:



The alternator should output 13.5v to 15v at 1200 RPM. A voltmeter is the only tool needed for testing.

The charge lamp on the instrument panel should come on before the engine starts, and go off while the engine is running. If the CHG light does not come on with the key (before the engine starts), then the alternator will not charge -- so replace a burned-out bulb right away.

If your charging system is not working correctly, see Alternator diagnoses

Disassembly & Maintenance

Part Numbers

B110 Japan-built

  • 23100-U0100 Stock 35-amp Hitachi LT-135-13
  • 23100-A5501
  • Type U01
    • 23100-U0102 Hitachi LT-135-35B
    • 23100-U0103 Hitachi LT-135-35C
    • OE+ AL208 $18.04 USD
    • BECK/ARNLEY 1860077 $35.79
    • BOSCH AL231X,AL232X $50.79
  • Alternate/OEM Part Numbers: 10463699, 19134540, 19134553, 23100A4601, 23100A4602, 23100A4611, 23100A4810, 23100A5500, 23100A5501, 23100B8001, 23100B8002, 23100H0300, 23100H0310, 23100M0400, 23100M0401, 23100M0402, 23100M0403, 23100M0410, 23100M0412, 23100M0413, 23100M0414, 23100U0100, 23100U0101, 23100U0102, 23100U0103, 23100U0104, 23100U0105, 23100U0110, 23100U0111, 23100U0112, 23100U0113, 23100U0114, 239900100, 329900100, 5812000530, 5812000840, 5812005300, 5812008400, 829906100, 829907600, 8942060810, 8942068100, 94023539, 94024347, 94026081, 94206081, 9822007640, A1T21171, A1T22581, A1T24371, A1T24471, AG2025A, AG2030A, AG2035A, AH2035N1

B210 50A

B210 A13 engine 50 amp Hitachi LT-150

  • 23100-P0101 ASSY-ALTERNATOR OP -0973
  • 23100-H6203 ASSY-ALTERNATOR OP 1073-0874
    • replaces 23100-P0101, 23100-H6200, 23100-H6201, 23100-H6202

B210 A14 engine 50 amp Hitachi LT-150
NOTE: Does Not fit A12 engine.

  • Looks like stock 35A
  • 23100-H7200 0974-0375
  • 23100-H7201 0475-0975
  • 23100-H7202 0575-0177
  • 23100-H7203 0277-0777
  • 23100-H7204 replaces H7200/01/02/03
  • Bosch AL237X $75.79


23100-U0113 8102-8109 Mitsubishi 12V-35A
23100-U0112 7804-8101 Mitsubishi 12V-35A
* 23100-U0110 -7511 Mitsubishi 35A AG203
* 23100-U0111 7512-7803 Mitsubishi 35A AH203

Late Model

Direct bolt-in replacement, however needs a minor wiring modification.

Main: LR135


Hitachi LT 
* Nissan 1970-1978
* Subaru 1977-1978
* Isuzu (Chevrolet) 1975-1987
* 23133-H0300 ASSY-HOLDER,BRUSH $5.95
  19305.jpgAlbum 19305
Brush Assembly with cover
23133-U0101 ASSY-BRUSH B210 -0874 $10.97
23133-P0100 ASSY-BRUSH B210 0974 $12.19
Niehof WA560 $9.99 
Fits thes USA models:
* Mazda 1986 323
* Mazda 1986-1987 B2000
* Mazda 1981-1986 626
* Mazda 1981-1985 GLC
* Mazda 1981-1984 B2000
* Datsun 1970-1973 240Z
* Datsun 1974 260Z 
* Datsun 1973-1976 610 
* Datsun 1974-1977 710 
* Datsun 1980-1981 810 
* Datsun 1975-1977 B210 
* Datsun 1975-1977 620 
* Datsun 1976-1977 F10 
* Datsun 1973-1974 620 PICKUP 
Brush Assembly
* 23135-H0300-  F B110, B210 A13 $5.95
* 23135-H0301-  E B110, B210 A13
Brushes, requires soldering


B110 uses an external voltage regulator. It uses a connector with spade terminals, and so is different from B210 which uses round pins. It controls the alternator output to between 13.5-15.0 volts.


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.


ダイナモ オルタネーター

サニートラ オルタネーター


A rebuilt alternator should have the following features:

* Bearing replacement
* brush replacement
* Slip ring lathe processing
* Cleaning
* painting
* metal parts plating
* new bolts
* new pulley
* test

The diode rectifier is not usually replaced, as it can last 50 years or more. Yes, they go bad, but there is no determinative age limit.


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