Hitachi LR Alternator

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The Hitachi LR series of internally-regulated Alternator was first fitted to North American Datsuns for the 1978 Model year and used in Australia in the 1980s.

Overview

The LR internally-regulated alternators came on newer A-series engines, from 1978 for Nissan North America, and from the 1980s for Australia. The 620 came with the LR-135 (35 AMP) which is same size as the Datsun 1200 LT-135. The B210 came with 50 AMP LR-150, it weighs about 2-1/2 pounds more than a stock Datsun 1200 35A model and about 1 pound more than an externally regulated 50A Hitachi. Also available in 60 amp model LR160 which is physically identical to the LR150.

Navara D21 1986-1992 alternator on Datsun 1200
Album 15469

Only a simple wiring change is required when replacing Datsun externally-regulated alternators.

Direct bolt-on to replace B110 35A
* Hitachi LR135 35A
* Mitsubishi A1T2

1" larger diameter, bolts to A12 engine
* Hitachi LR150 50A
* Hitachi LR160 60A
* Mitsubishi A2T2 50A
* Mitsubishi A2T3 50A
* BOSCH 0986
* BOSCH 3262
* BOSCH 3349
* LUCAS LRA02563
* LUCAS LRA2563 

buy at RockAuto.com

Hitachi LR135/Mitsubishi A1T2 (small diameter, same as B110 LT-135) bolt-in replacement, but with L-S wiring

Has same T-connector, but is LR is additionally notched
 

Bosch Al237x rebuild Hitachi 50 Amp

Middle two alternators: Hitachi LR-type 50-60 amp
Album 5088
LR160 - 60A, second from left
LR150 - 50A, third from left (Bosch compatible unit)

50A 23100-H7711 Mitsubishi A2T24971 - compatible
Album 25531

Physical Specifications

* Engine-mounting side is 80 mm (~3-3/16") in between ears, same as stock Datsun 1200
* 10.5mm diameter mount holes
* front flange (bolt ears) 13mm thick
* Adjuster ear 175mm (~6-7/8") across
  The stock 1200 unit is smaller at 156mm (~6-1/8") from the mount ear.
  * So you may need a late A12 adjuster and fan belt
  * threaded for M8x1.25 bolt
* About 129mm diameter. 
* Fan belt center: 29mm from front bolt face
* Pulley diameter: 69mm

Wiring

See main article: IR Alternator Wiring

Sources

Australia Sources
* Mazda 12B, 13B, F8, FE, MA, VC
* Subaru Leone/Brumby
* Isuzu Trooper (has vacuum pump & triple pulley)
* Nissan Patrol/Navara (has vacuum pump)
* Ford Courier diesel (has vacuum pump)

Japan Sources
LR135 (35 AMP)
* 1200 Sunny Truck

North America sources
[[LR135) (35 AMP)
* 1978-1979 Datsun 620 pickup
* 1980 Datsun 720 pickup
LR150 (50 AMP)
* Datsun 200SX (1978 - 1979) 
* Datsun B210 1978 
* Datsun 210 (1979 - 1982) 
* Datsun 310 (1979 - 1982) 
* Datsun 510 (1978 - 1981) 
* Datsun 720 PICKUP (1981 - 1985)
* Mazda 1979-1985 RX7
* Mazda 1979-1982 626
* Mazda 1979-1987 929
LR160 (60 AMP)
* Datsun 200SX (1978 - 1983) 
* Datsun 310 (1979 - 1981) 
* Datsun 310 DELUXE 1982 
* Datsun 310 GX (1980 - 1982) 
* Datsun 510 (1978 - 1981) 
* Datsun 720 PICKUP (1981 - 1985) 
* NISSAN PULSAR 1983 
* NISSAN PULSAR NX (1983 - 1986) 
* NISSAN PULSAR NX TURBO 1983

Parts

B122 Hitachi LR135 (35A) : See LR135 

B210 1978, B310 50 amp Hitachi LR150
* 23100-H7703 B310 0381-
  * replaces 23100-H7702 B310 0580-0281
  * replaces 23100-H7701 B310 0978-0480
  * replaces 23100-H7700 B210 0877-, B310 -0878
* BOSCH AL238X, AL241X $71.99 at RockAuto.com
* BBB PRECISON 14255
* REMY 14185 
* BECK/ARNLEY 1860266 
* ACDELCO 321-1265 {#10463708}

Diode assembly
* Nissan 23230-W7101 or 23230-P2501 DIODE ASSEMBLY 
* AIRTEX 2D3071

LR160 60 Amp
* 23100-W5807 Hitachi LR160, replaces 23100-W5805, 23100-W5806
* BOSCH AL241X
* BBB PRECISON 14587
* ACDELCO 3341661 {60 AMP #19134654}
* REMY 14301 

Brushes

Brush Assembly LR150 (B210 from 0877)
* 23135-P2500 BRUSH ASSY LR150
* 23133-P2501 BRUSH REGULATOR ASSY LR150 replaces 23133-P2500
  * Includes IC regulator
* STANDARD MOTOR PRODUCTS Part # VR592
* AIRTEX/WELLS 5A1122
* STANDARD MOTOR PRODUCTS JX108
  * Width 17/64"
  * Thickness 29/32" 

Rockauto.com

Regulator

B210 1978 Internal IC Regulator (requires soldering)
* Nissan 23215-P2501 IC REGULATOR ASSY LR150 0877- replaces 23215-P2500
* STANDARD MOTOR PRODUCTS VR162
* ULTRA-POWER VR162

Rockauto.com

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Others

Round I-L-S connector

* may fit stock adjuster bracket (156mm mounting)
* Use with 4mm spacer (extra washers) on engine rear mount bolt

North America sources
Hitachi LR160-723
* 1990-1993 Nissan Pickup
Hitachi LR150-704
* 1989-1992 Isuzu Amigo
* 1988-1992 Isuzu Pickup
* 1991-1992 Isuzu Rodeo
* 1987-1991 Isuzu Trooper 2.3
Hitachi LR150-718 
* NOTE: 175mm mounting
* 1989-1992 Isuzu Amigo
* 1988-1992 Isuzu Pickup
* 1991-1992 Isuzu Rodeo

Squared-Round S-L connector

Hitachi LR170-734B/739B/745 (about 1/2 kilo heaver that LR160)
* NOTE: 175mm mounting
* NOTE: 8.5 mm (smaller) mounting holes
* NOTE: Large 77m pulley

North America sources:
* 1990-1995 Nissan Pathfinder
* 1990-1995 Nissan Pickup