YANMAR LR160-741 12V 60 Amp Alternator Instruction Manual
- June 15, 2024
- YANMAR
Table of Contents
YANMAR LR160-741 12V 60 Amp Alternator Instruction Manual
Alternator standard, 12V/60A
The alternator serves to keep the battery constantly charged. It is installed on the cylinder block by a bracket, and is driven from the V-pulley at the end of the crankshaft by a V belt. The type of alternator used in this engine is ideal for high speed engines with a wide range of engine speeds. It contains diodes that convert AC to DC, and an IC regulator that keeps the generated voltage constant even when the engine speed changes.
Specifications
| Yanmar code | 128271-77200 |
|---|---|
| Model of alternator | LR160-741 (HITACHI) |
| Model of IC regulator | SA-A (HITACHI) |
| Battery voltage | 12V |
| Nominal output | 12V/60A |
| Earth polarity | Negative earth |
| Direction of rotation (viewed from pulley end) | Clockwise |
| Weight | 4.2 kg |
| Rated speed | 5000 min-1 |
| Operating speed | 1,050-18,000 min-1 |
| Speed for 13.5V at 20°C | 1050 min-1 or less |
| Output current for 13.5V | 56A or more/ 5000 min-1 |
| Regulated voltage | 14.4±0.3V (at 20°C, voltage gradient, -0.01V/°C) |
Structure
-
Disassembly drawing
-
Structure
Wiring diagram
[NOTICE]
- Don’t do misconnecting and short-circuit of each terminal.
- Don’t remove a battery terminal and a B terminal when rotating.
- Shut out a battery switch during the alternator stop.
Standard output characteristics
The standard output characteristics of this alternator are shown as the below
figure.
Inspection
- V belt inspection
- Inspect the matter whether there are not crack, stickiness and wear on the belt visually. Check that a belt doesn’t touch the bottom part of the pulley groove. If necessary, replace the V belt set.
- V belt tension : (Refer to 2.2.2.(4) in Chapter 2.)
- Visual check of wiring and check of unusual sound
- Confirm whether wiring is right or there is no looseness of the terminal part.
- Confirm that there is no unusual sound from the alternator during the engine operation.
- Inspection of charge lamp circuit
- Move a start switch to the position of on. Confirm lighting of the charge lamp.
- Start an engine, and confirm the lights-out of the lamp. Repair a charge lamp circuit when a lamp doesn’t work.
Alternator 12V/80A (Optional)
Specifications
| Yanmar code | 119573-77201 |
|---|---|
| Model of alternator | LR180-03C (HITACHI) |
| Model of IC regulator | TR1Z-63 (HITACHI) |
| Battery voltage | 12V |
| Nominal output | 12V/80A |
| Earth polarity | Negative earth |
| Direction of rotation (viewed from pulley end) | Clockwise |
| Weight | 5.4 kg |
| Rated speed | 5000 min-1 |
| Operating speed | 1,200-9,000 min-1 |
| Speed for 13.5V at 20°C | 1,200 min-1 or less |
| Output current for 13.5V | 75A or more/ 5000 min-1 |
| Regulated voltage | 14.5±0.3V (at 20°C, voltage gradient, -0.01V/°C) |
Structure
Disassembly drawing and Structure
Wiring diagram
[NOTICE]
- Don’t do mis-connecting and short-circuit of each terminal.
- Don’t remove a battery terminal and a B terminal when rotating.
- Shut out a battery switch during the alternator stop.
Standard output characteristics
The standard output characteristics of this alternator are shown as the below
figure.
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