Lombardini LDW 502 User Manual

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06
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SPEED GOVERNOR
The weight-type mechanical governor, is driven directly by the
camshaft and is housed with the cylinder head.
Components:
1 Thrust washer
2 Spool
3 Flyweight assembly
Note: In engines with the minimum/maximum (see fig. 49) the
weights are lightened by 25%.
Governor springs for Gensets
In the section view of the leverages the 4 ball bearings A are
highlighted.
They are mounted on engines for generator sets adjusted at
1,500÷1,800 rpm and on other particular applications on request.
Governor springs
Unscrew the pin that attaches it to the cylinder head.
To remove it as shown in the figure it is necessary to dismount the
camshaft. It could also be removed from the accelerator box side by
unscrewing the torque gearing device.
Before reassembling it, check value A (45 to 46 mm) and the
parallelism of the two levels B that must not exceed 0.05 mm.
Note: There are 5 different types of regulator springs C. These
change according to the engine adjustment: standard spring
for 3,600 rpm, for 3,000 rpm, for 2,400 to 2,600 rpm, for
1,800 rpm and for 1,500 rpm.
Speed governor components
1 Oil seal
2 Screw
3 Support
4 O-Ring
5 Bearing
6 Retainer
7 Screw
8 Flyweight assembly
9 Spool
10 Thrust washer
Disassembly / Reassembly

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