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[Datsun 1200 encyclopedia]

Hitachi LR Alternator

Revision as of 07:48, 25 May 2012; view current revision
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Category: Charging System Modifications

The Hitachi LR series of internally-regulated Alternator was first fitted to North American B210 for the 1978 Model year. 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. The LR160 60 amp model is physically identical, and was first used around 1983.

AL238X_2.JPG


Contents

Physical Specifications

The LR150/LR160 came on newer A-series engines.

5088.jpg

  • LR160 - 60A, second from left
  • 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

If you install an LR alternator with internal-regulator on a 1200:

  • disconnect the voltage regulator
  • On the B110 regulator harness that goes down to the engine, connect WB wire of connector to WR wire of connector:
  • WR <--> WB
  • 7441.jpg wiring jumper
  • Logically, you are connecting the "L" (Lamp) of new alternator to "L" (Lamp) of the wiring harness which is connected to the IGN switch. Be sure to use the original Datsun 1200 wiring harnesses as the "L" wire color WR is a switched source in the harness. Only one jumper wire is needed.

Some prefer two wires, which works on a 1200, 1200 with auto-choke, and with other Datsuns:

  • Jump W to Y wires
  • Jump WR to WB wires

wiring diagram:
7440.jpg

14739.jpg Store-bought version ($30) of jumper wire

You can buy one mail-order from Bprojects. Endo will take care of you, send an email to Bprojects.

ic%20harness.gif
Price: 5,250yen (about $52 USD)

Automatic Choke

NOTE: If your Datsun was factory-equipped with Automatic Choke, a second jumper is needed. See above.

Alternate method of wiring the choke: With LR alternator: On the carburetor, unplug the electric choke. Make a new jumper wire from the choke to the ballast resistor (12V side). The downside of this is the choke starts warming as soon as KEY is ON, whether the engine starts or not. If you have trouble starting the engine, in cold weather you may never get it started, because the choke begins to open.


Original Wiring

The wiring harness for Datsun 1200 auto choke with LT-series alternator, for example, the 1973 1200 USA, the choke relay is connected to Ground. See Alternator_Wiring#Automatic_Choke_Relay
14977.jpg 1200 relay, normally open. Alternator output will close the relay, activating the choke heater.

The wiring harness for B310 with LR-series alternator, the choke relay is connected to IGN
24362.jpg B310 relay - normally closed. IGN switch will activate the relay, deactivating choke heater. Then alternator output will de-activate the relay, causing the choke heater to power up.

The Choke Relay is wired oppositely different on LT-series and LR-series applications. However, since both are triggered by the Lamp/Nuetral wire, either alternator will work with either wiring harness/relay combination (old harness/old relay OR new harness/new relay).

Troubleshooting

1. Check the Voltage at the alternator. Between the BAT terminal and the E terminal (earth/ground) there should be the same V as at the battery. If not, you got a wiring problem.

2. The S terminal should be 12V hot when key is turned to IGN

NOTE: on the B310 with this, S is hot all the time
either way will work

3. The L terminal (Lamp) should be:

  • 0V when key is turned OFF
  • 12V (more or less) when key is turnd ON

Because the L terminal is the exciter, if your CHG lamp is burned out, the Hitachi LR won't charge.

th_EL-19.jpg

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


LR160 60 Amp

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


Sources

LR150

  • Datsun 200SX (1978 - 1979)
  • Datsun B210 1978
  • Datsun 210 (1979 - 1982)
  • Datsun 310 (1979 - 1982)
  • Datsun 510 (1978 - 1981)
  • Datsun 720 PICKUP (1981 - 1985)


LR160

  • 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


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
    VR-592_FULL.jpg

Regulator

B210 1978 Internal IC Regulator (requires soldering)

  • 23215-P2501 IC REGULATOR ASSY LR150 0877- replaces 23215-P2500
  • STANDARD MOTOR PRODUCTS Part # VR162
    VR-162_TERMINAL.jpg

Others

Round I-L-S connector

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

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
  • 1990-1995 Nissan Pathfinder
  • 1990-1995 Nissan Pickup