Yanmar 2TNV70 Service Manual (English)

Other manuals for Yanmar 2TNV70

Questions and Answers:

Emily SmithAug 6, 2025

What to do if there are problems with the lubricating system in my Yanmar Engine?

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Blake JohnsonAug 6, 2025
For issues within the Yanmar Engine's lubricating system, possible causes and solutions include: * Improper lube oil properties: Use the correct lube oil. * Leakage from the lube oil piping system: Repair any leaks. * Insufficient delivery capacity of the trochoid pump: Check and repair the pump. * Clogged lube oil filter: Clean or replace the filter. * Defective pressure regulating valve: Clean, adjust, or replace the valve. * Insufficient lube oil level: Add the proper lube oil to the correct level.

Charles RuizAug 15, 2025

How to troubleshoot cooling water system issues in a Yanmar 2TNV70?

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Tracey NicholsAug 15, 2025
When dealing with issues in the Yanmar Engine's cooling water system, consider these points: * Excessive cooling effect of the radiator: This could be due to a defective thermostat (kept closed). * Insufficient cooling effect of the radiator: This may be caused by a defective thermostat (kept opened) or a slipping fan belt. * Insufficient cooling water level: Check for water leakage from the cooling water system. * Cracked water jacket: Repair or replace the cracked water jacket. * Slackened fan belt: Adjust the belt tension. * Defective thermostat: Check or replace the thermostat.

Yanmar 2TNV70 Specifications

General

Engine Model	2TNV70
Number of Cylinders	2
Bore x Stroke	70 mm x 74 mm
Displacement	0.570 L
Cooling System	Water-cooled
Fuel	Diesel
Starting System	Electric starter
Compression Ratio	23.5:1
Type	Vertical, Water-cooled, 4-cycle diesel engine
Combustion System	Indirect injection
Lubrication System	Forced lubrication
Direction of Rotation	Counterclockwise (viewed from flywheel)
Weight	Approx. 72 kg