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Kubota WG752 E3 User Manual

Kubota WG752 E3
93 pages
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KUBOTA ENGINES
APPLICATION MANUAL
(WG752, WG972 E3 MODEL)
(DG972 E2 MODEL)
First Edition
January, 2011
KUBOTA

Table of Contents

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Kubota WG752 E3 Specifications

General IconGeneral
Engine ModelWG752 E3
Number of Cylinders3
Fuel TypeGasoline
Engine Type4-cycle
Cooling SystemLiquid-cooled

Summary

PREFACE

GENERAL INFORMATION

SPECIFICATIONS

Detailed technical specifications for Kubota engines.

PERFORMANCE CURVES

Graphs illustrating engine performance characteristics under various conditions.

DIMENSIONS

Physical dimensions and layout drawings of the engine models.

EMISSION REGULATION

GENERAL

General overview of emission regulations and engine availability.

IMPORTANT ITEMS

Key considerations and notices regarding emission compliance.

FUEL SYSTEM

GENERAL

Details on gasoline, LPG, and natural gas fuel specifications.

FUEL DIAGRAM

Schematic diagrams of fuel systems for WG752, WG972, and DG972 engines.

CAUTIONS

Safety precautions and guidelines for fuel system installation and operation.

HIGH ALTITUDE OPERATION

Procedures and kits for operating engines at high altitudes.

EVAPORATIVE EMISSION CONTROL

Regulations and checks for controlling evaporative emissions.

EXHAUST SYSTEM

GENERAL

Guidelines for using certified catalytic mufflers and converters.

EXCEPTIONS

Use of spacers to avoid interference with exhaust manifold and catalyst parts.

RELATED CHECK ITEMS

Items to confirm for proper exhaust system installation and function.

FOR MASS PRODUCTION

Procedures for identifying and recording catalyst parts for mass production.

ELECTRICAL SYSTEM

WIRING DIAGRAM

Schematic diagrams illustrating engine electrical system connections.

CAUTION

Precautions regarding electrical wiring for igniter and IG coils to prevent damage.

TECHNICAL INFORMATION

BRAKE HORSE POWER

Horsepower output data for different models, fuels, and speeds.

FUEL CONSUMPTION

Data on fuel consumption rates for various operating conditions.

SOUND PRESSURE LEVEL

Measurement of sound pressure levels at different engine speeds and loads.

AIR REQUIREMENTS

Calculations for combustion and cooling air requirements.

EXHAUST GAS VOLUME

Volume of exhaust gas produced at different engine speeds and fuels.

HEAT REJECTION TO COOLANT

Data on heat rejected to the cooling system.

WATER FLOW RATE

Information on coolant flow rates for WG752 and WG972/DG972 models.

CENTER OF GRAVITY

Coordinates for the engine's center of gravity.

MASS ELASTIC SYSTEM

Torsional vibration data, including equivalent lengths and inertia.

UNBALANCED FORCES

Calculations for unbalanced inertia forces and couples.

Emissions-Related Installation Instructions

Important Notice

Critical instructions for final engine assemblers regarding emission compliance.

Air Intake System

Installation guidelines for the engine's air intake system.

Exhaust System

Guidelines for installing certified exhaust system components.

High Altitude Operation

Information on altitude compensation kits for engine operation.

Evaporative Emission Controls

Regulations and checks for controlling evaporative emissions.

Engine Set Speed

Procedures for setting and adjusting engine operating speeds.

Certification labels

Requirements for visible and duplicate emission control information labels.

Vaporizer Connections

Specifications for connecting LPG vaporizers to carburetors.

Production Installation Checklist

Checklist for verifying emissions-related installations during final assembly.

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