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Lombardini LGA 340 OHC - User Manual

Lombardini LGA 340 OHC
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WORK SHOP
MANUAL
LGA 280-340 OHC Series engines,code 1-5302- 528
SERVICE
LGA 280 OHC
LGA 340 OHC
COMPILER TECO/ATI
REG. CODE
1-5302-528
MODEL N°
50805
DATE OF ISSUE
31.07.2001
REVISION 00
ENDORSEDDATE
31.07.2001
1st Edition
1

Table of Contents

Other manuals for Lombardini LGA 340 OHC

Preview: Use & Maintenance
Use & Maintenance42 pages

Questions and Answers

  • D
    Diane MaciasAug 16, 2025
    Why Lombardini LGA 340 OHC does not start?
    • B
      brandon86Aug 16, 2025
      If your Lombardini Engine doesn't start, several factors could be at play. Begin by checking if the tank plug breather or tap are clogged and clear them if necessary. Inspect the fuel filter and clean or replace it if it's clogged. Also, ensure the spark plug isn't grounded or broken, and the coil isn't defective. A clogged air filter or low oil level could also be the cause, so check and address those. Finally, inspect the valves for blockages and tighten any loose head locking-nuts.
  • D
    Dominique HallAug 19, 2025
    What to do if Lombardini LGA 340 OHC Engine has no power?
    • M
      Michael PooleAug 20, 2025
      If your Lombardini Engine lacks power, the possible reasons are: blocked valves or a low idling rate. You should inspect the valves for blockages and adjust the idling rate.
  • K
    Kathy DavidsonAug 22, 2025
    What to do if Lombardini LGA 340 OHC Engine starts and stops?
    • C
      Chloe WilsonAug 22, 2025
      If your Lombardini Engine starts and then stops, it could be due to a clogged tap, a blocked carburetor needle valve, or a blocked speed governor rod. Check the tap and clear it if clogged. Inspect the needle valve and replace or clean it. Also, check the governor rod for any blockages.
  • A
    Alexandria HolmesAug 26, 2025
    Why Lombardini Engine overheats?
    • W
      Whitney PerezAug 26, 2025
      If your Lombardini Engine overheats, it might be due to piston seizure. Inspect for piston seizure and rectify the issue.
  • J
    Jesse HaneyAug 28, 2025
    How to fix a noisy Lombardini LGA 340 OHC Engine?
    • M
      Mrs. Natalie Lee DVMAug 28, 2025
      If your Lombardini Engine is excessively noisy, it could be due to worn piston rings or excessive valve play. Inspect the piston rings and replace them if necessary. Also, adjust the valve play.
  • Z
    Zachary SalasAug 31, 2025
    What to do if Lombardini LGA 340 OHC does not accelerate?
    • M
      Marc OrtizSep 1, 2025
      If your Lombardini Engine does not accelerate, it might be due to piston seizure. Inspect for piston seizure and rectify the issue.
  • Y
    ywardSep 3, 2025
    Why Lombardini LGA 340 OHC Engine produces dark or black smoke?
    • A
      Ashley ThompsonSep 4, 2025
      If your Lombardini Engine is emitting dark or black smoke, this could be caused by worn piston rings or worn valve guides. Check the valve guides and replace if worn and inspect the piston rings and replace if necessary.
  • C
    Charles MoodySep 6, 2025
    Why Lombardini LGA 340 OHC consumes oil?
    • J
      Jay WilliamsonSep 6, 2025
      If your Lombardini Engine consumes oil, it is likely due to worn piston rings. Inspect the piston rings and replace them if necessary.
  • B
    bellcourtneySep 9, 2025
    Why Lombardini LGA 340 OHC produces light or white smoke?
    • E
      Emily OrtizSep 9, 2025
      If your Lombardini Engine is emitting light or white smoke, this could be caused by worn piston rings. Inspect the piston rings and replace them if necessary.
  • D
    dale20Sep 12, 2025
    Why Lombardini LGA 340 OHC Engine hunts?
    • J
      Jill BrownSep 12, 2025
      If your Lombardini Engine hunts, it could be due to a worn governor spring. Inspect the governor spring and replace it if necessary.

Summary

PREFACE

General Service Manual Notes

Essential guidelines for safe and effective engine service.

WARRANTY CERTIFICATE

TROUBLE SHOOTING

WARNING SIGNS - SAFETY INSTRUCTIONS

ENGINE IDENTIFICATION

TECHNICAL FEATURES

CHARACTERISTICS

OVERALL DIMENSIONS

MAINTENANCE

DISASSEMBLY;REASSEMBLY

General Repair Information

Essential rules and guidelines for performing repairs safely and efficiently.

Engine Preparation

Steps for preparing the engine before starting disassembly.

Flywheel Extraction

Procedure for removing the engine flywheel using a puller.

Head Disassembly

Steps for safely disassembling the cylinder head.

Camshaft and Tappets Valves Disassembly

Timing Pulley Removal

Timing Cover Removal

Camshaft Inspection

Valves, Guides, Seats, Springs, Tappets

Valve and Valve-Guides Gap

Valve Guides Wear Check

Valve Seats Servicing

Cylinder Inspection

Connecting Rod Inspection

Piston and Rings Inspection

Piston Rings Gap and Clearance

Drive Shaft Inspection

Governor and Balancing Shaft Gear Command

Speed Governor Check

Recoil Starter Servicing

Rope and Return Spring Replacement

Crankshaft and Oil Seal Rings Fitting

Piston and Connecting Rods Assembly

Cylinder Head Assembly

Camshaft Assembly and Valve Clearance

Timing Adjustment and Belt Assembly

Flywheel Assembly and Coil Gap

Carburetor Servicing

Lubrication System Overview

ELECTRONIC IGNITION

Electronic Ignition System

Overview of the inductive discharge electronic ignition system.

Spark Plug Maintenance

Spark plug cleaning, gap check, and replacement.

ELECTRIC STARTING

Electric Starting System Overview

Components and standard electrical system for starting.

System Checks and Troubleshooting

Procedures for checking and diagnosing starting system faults.

Alternator and Rectifier Checks

Inspection and testing of alternator and rectifier components.

Starter Motor and Battery

Starting Panel and Lighting System

ADJUSTMENTS

Governor Lever Adjustment

Procedure for adjusting the governor lever for correct operation.

Engine Test Procedures

Steps for testing the engine after assembly or adjustment.

Carburetor and RPM Adjustment

STORAGE

Temporary Storage Procedures

Recommended steps for storing the engine temporarily.

Preparation for Starting After Storage

Steps to take before restarting an engine after storage.

INSTALLATION - INCLINATION LIMITS OF OPERATION

Installation Guidelines

General guidance for installing the engine.

Inclination and Load Limits

Operational limits for engine inclination and external loads.

TORQUE SETTINGS

Main Torque Settings

Key torque specifications for engine assembly.

TORQUE SPECIFICATIONS

Standard Bolt Torque Specifications

General torque values for various bolt sizes and grades.

SPECIAL TOOLS

Special Tools List

Reference list of specialized tools for engine maintenance.

PISTON-CYLINDER OVERSIZE, TOLERANCES, CLEARANCES

Piston-Cylinder Oversize Table

Specifications for piston and cylinder oversize dimensions.

Crankshaft Journal and Connecting Rod Tolerances

Tolerances for crankshaft journal and connecting rod grinding.

Clearances and Adjustments Table

Table of critical clearances and adjustment values.

Lombardini LGA 340 OHC Specifications

General IconGeneral
Cylinders1
Fuel SystemCarburetor
Governor TypeMechanical
Displacement337 cc
Fuel TypePetrol
Cooling SystemAir-cooled
Starting SystemRecoil start
Oil capacity1.1 L
Lubrication SystemForced lubrication

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