Lombardini LDW 502 User Manual

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06
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Alternator, Marelli type AA 125 R 14V 45A
Characteristics:
Nominal voltage ........................................ = 14V
Nominal current output ............................. = 45A
Maximum Rpm ......................................... = 14000 giri/1'
Maximum peak Rpm (for 15') ................... = 15000 giri/1'
Bearing, Pulley End .................................. = 6203-2Z
Bearing, Voltage Regulator End ............... = 6201-2Z/C3
Voltage regulator ...................................... = RTT 119 A
Rotation (viewed at puley end): Clockwise
Note: Use only high temperature grease when servicing bearings
 Tighten nut 1 at a torque of 60 Nm.
Alternator, Marelli type AA 125 R 14V 45A - Performance Curve
The curve was obtained at room temperature of +25°C with a costant
13 V battery voltage.
P1 = Power Output (KW)
I = Current Output (Amps)
ηη
ηη
η = Efficiency
Note: The RPM shown is that of the alternator. The value of the
rpm axis must be multiplied by 1000.
Alternator speed is a function of engine speed and the
crankshaft pulley diameter. If the engine pulley is 88 mm,
then the alternator speed ration is 1.3:1. If the engine pulley
is 108 mm, then the alternator speed ratio is 1.6 : 1.
Electric System

Lombardini LDW 502 Specifications

General

Engine Type	Diesel, 4-stroke
Number of Cylinders	2
Fuel System	Indirect injection
Starting System	Electric start
Lubrication System	Forced lubrication with gear pump
Bore x Stroke	72 mm x 62 mm
Cooling System	Air-cooled
Displacement	505 cm³ (30.8 cu in)

Summary

General Remarks and Safety Information

Safety and Warning Decals

Explains the meaning of symbols used for safety warnings.

Safety Regulations

Lists critical safety rules for engine operation and general precautions.

General Safety During Operating Phases

Outlines safety procedures to follow during engine operation.

Technical Information

Trouble Shooting

Guides users through diagnosing and resolving engine issues.

Technical Specifications

Provides detailed technical data and specifications for various engine models.

Maintenance - Recommended Oil Type - Refilling

Routine Engine Maintenance

Outlines the schedule for regular engine servicing and checks.

Lubricant and Specifications

Prescribed Lubricant

Specifies the exact types and capacities of lubricants required for the engine.

Fuel and Coolant Specifications

Details required fuel quality and coolant types, mixtures, and handling.

Disassembly / Reassembly

Timing Belt / Timing Pulley Arrangement

Illustrates the timing belt and pulley system for correct engine timing.

Cylinder Head, Removal

Details the procedure for safely removing the cylinder head from the engine block.

Turbocharger

Turbocharger Pressure Testing

Details the procedure for testing turbocharger pressure for proper function.

Turbocharger West Gate Adjustment

Explains how to adjust the turbocharger's waste gate for optimal performance.

Lubrication Circuit

Oil Pump

Describes the function and components of the engine's oil pump.

Oil Filter Cartridge

Oil Pressure Check

Fuel System

Pump/Injector Unit Components

Static Injection Advance Tuning

Injection Pumps Delivery Balancing

Settings

Setting the Idle Speed (Standard)

Pump Injection Delivery Standard Setting Without Dynamometric Brake

Pump/Injector Unit Timing with Speed Governor

Torque Specifications and Use of Sealant

Table of Tightening Torques for the Main Components