Lombardini LDW 502 User Manual

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FOCS Workshop Manual_cod. 1.5302.351_7° ed_ rev. 06
4
103
T/4021-4021-309-206-205WDL
A 000,27÷099,17
049,17÷039,17
070,0÷050,0
B 010,27÷000,27
059,17÷049,17
C 020,27÷010,27
069,17÷059,17
4041-3001-207WDL
A 000,57÷099,47
049,47÷039,47
070,0÷050,0
B
010,57÷000,57059,47÷049,47
C 020,57÷010,57
069,47÷059,47
Piston, disassembly and inspection
Remove the stop rings and remove the pin, see fig. 101.
Remove the piston rings and clean the slot.
Measure diameter Q at height A from the base of skirt (A = 9 mm).
If the diameter is worn more than the 0.05 mm minimum given
value, replace piston and rings.
Note: The provided oversize elements are of 0.50 mm and 1.00 mm
Piston, class
The pistons are subdivided according to their diameters into categories: A, B, C. These references, are shown on the top of
the piston (see fig. 100).
Piston supply:
Pistons at the nominal diameter are only supplied in category A.
Pistons oversized by 0.50 and 1.00 mm are supplied with reference to the increased level on the piston crown:
Ø 72.5 - Ø 73 for LDW 502-602-906-1204-1204/T engines and Ø 75.5 – 76.0 for LDW 702-1003-1404 engines.
Class Ø Cylinder - mm Ø Piston - mm Clearance - mm
Class Ø Cylinder - mm Ø Piston - mm Clearance - mm
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