Yanmar 4D94LE User Manual

SERVICE MANUAL
REVISED: FEBRUARY 2009
Read and observe all warnings on this unit
before operating it.
DO NOT operate this equipment unless all
factory installed guards and shields are
properly secured in place.
WARNING
4D94(L)E / 4D98E DIESEL ENGINES
Federal Environmental Protection Agency (EPA) Emission Control Compliant
BX20 S/N 580001A~ 4D94(L)E EPA TIER 2 400/500/600PD-14
BX50 S/N 200001A - 215882A 4D94(L)E EPA TIER 2
400/500/550/600/650/700PD-16
BX50 S/N 215883A~ 4D98E EPA TIER 3
SM197T
4D94E-BE4
4D94(L)E
4D98E

Yanmar 4D94LE Specifications

General

Engine Model	4D94LE
Number of Cylinders	4
Bore x Stroke	94 mm x 100 mm
Fuel System	Direct Injection
Compression Ratio	22:1
Engine Type	Diesel
Cooling System	Water-cooled
Lubrication System	Forced Lubrication
Starting System	Electric starter
Direction of Rotation	Counterclockwise, viewed from flywheel side

Summary

1. GENERAL

1-1 Specifications

Engine specifications including bore, stroke, displacement, and output ratings.

1-2 Fuel oil, lubricating oil and cooling water

Guidelines for proper fuel, oil, and coolant selection and maintenance procedures.

1-3 Engine performance curve

Performance characteristics (output, torque, fuel consumption) for different engine models.

1-4 Engine external views

Diagrams identifying external components of the 4D92E, 4D94LE, and 4D98E engines.

1-5 Structural description

Detailed diagrams and explanations of the internal structural components of the engines.

1-6 How to read this manual

Instructions on interpreting manual content, including explanations, procedures, and abbreviations.

1-7 Precautions for service work

Essential safety, preparation, and procedural precautions for performing engine service.

1-8 Tightening torques for standard bolts and nuts

Reference table for correct tightening torques of standard bolts and nuts in engine assembly.