Description
Yanmar TNE Series Engine Service Manual is the factory technical publication covering maintenance and service procedures for Yanmar industrial TNE diesel engines. This 136-page manual addresses both special swirl pre-combustion chamber indirect-injection engines and direct-injection versions within the TNE series.
Produced for professional technicians and engine repair workshops, the manual provides specifications, service data, inspection procedures, adjustment information, dismantling and reassembly instructions. It also recognises that a standard TNE engine may differ from an engine installed in a generator, pump, compressor, combine or other driven machine; the relevant machine manual should therefore be consulted for installation-specific information.
The supplied extract specifically identifies the 2TNE68, 3TNE68, 3TNE74 and 3TNE78A, with further TNE variants represented in the complete model specification section.
SPECIFICATIONS AND ENGINE SYSTEMS
The opening section contains individual model specifications and performance data. Information is arranged by engine model and operating configuration, allowing workshop personnel to refer to the applicable figures during servicing and inspection.
Principal subjects include:
- Engine specifications and performance data
- Model identification and model-name breakdown
- Indirect-injection combustion system
- Direct-injection combustion system
- Cooling water requirements
- Lubricating oil information
- Fuel oil information
- Engine application categories
MEASUREMENT, INSPECTION AND ADJUSTMENT
The Yanmar TNE Series Engine Service Manual gives workshop procedures for checking engine condition and carrying out essential adjustments. It identifies the required service tools and measuring instruments before presenting the applicable inspection methods.
Procedures covered include:
- Measuring cylinder compression pressure
- Adjusting valve-head clearance
- Checking V-belt tension
- Measuring injection pressure
- Checking fuel-injection valve spray patterns
- Checking and adjusting fuel-injection timing
- Adjusting maximum and minimum no-load speed
- Testing the cooling system and radiator for leakage
- Checking the oil cooler
- Checking the piston cooling nozzle
ENGINE SERVICE DATA
Measurement procedures, service limits and corrective-action information are provided for major internal engine components. These sections support accurate assessment of reusable parts during overhaul rather than relying on visual inspection alone.
- Cylinder block
- Valve rocker-arm components
- Pistons and piston rings
- Connecting rods
- Camshaft
- Crankshaft
- Gears
- Trochoid oil pump
- Side clearances and backlash
- Oil clearances
DISASSEMBLY AND REASSEMBLY
The overhaul chapters provide an ordered approach to engine dismantling and rebuilding. Precautions to observe before and during reassembly are included, together with tightening information and component inspection guidance.
- Engine disassembly sequence
- Reassembly precautions
- Cylinder head servicing
- Cylinder block inspection
- Valve rocker-arm servicing
- Piston and piston-ring inspection
- Connecting-rod checks
- Camshaft and crankshaft inspection
- Gear inspection
- Main and standard bolt and nut tightening torques
FUEL-INJECTION EQUIPMENT AND GOVERNOR
Separate chapters cover fuel-injection pumps used with the indirect- and direct-injection systems. Exploded views accompany dismantling, inspection and reassembly information, while dedicated governor material distinguishes between the two injection arrangements.
- YPFR-type indirect-injection fuel pump exploded views
- Indirect-injection pump disassembly and reassembly
- Direct-injection pump exploded views
- Special fuel-pump service tools
- Direct-injection pump disassembly
- Fuel-pump inspection
- Direct-injection pump reassembly
- Indirect-injection governor exploded views
- Direct-injection governor exploded views
- Governor disassembly, inspection and reassembly
TURBOCHARGER AND EMISSIONS INFORMATION
The publication also includes turbocharger service material and service information relating to CARB ULG regulation. Coverage shown in the contents includes wastegate adjustment, exploded illustrations, tightening torques and service standards.
- Wastegate valve adjustment
- Turbocharger exploded view
- Turbocharger tightening torques
- Turbocharger service standards
- Emission-control labels
- High- and low-idle adjustment screw limiting
- Fuel-volume limiter screw information
- Engine component exploded drawings
TROUBLESHOOTING AND REPAIR
Troubleshooting information identifies engine trouble causes and remedies. Compression-pressure measurement is included as a diagnostic method, helping technicians relate measured engine condition to likely faults before undertaking dismantling or adjustment.
YANMAR TNE SERIES ENGINE SERVICE MANUAL COVERAGE
Series: Yanmar industrial TNE series diesel engines.
Models clearly identified in the supplied extract: 2TNE68, 3TNE68, 3TNE74 and 3TNE78A.
Applications: Industrial engines used in driven machinery such as generators, pumps, compressors and combines. Installation-specific service information remains subject to the manual for the relevant driven machine.
MANUAL DETAILS
- Manufacturer: Yanmar Diesel Engine Co., Ltd.
- Manual type: Factory service manual
- Engine series: TNE
- Injection systems: Indirect and direct injection
- Page count: 136 pages
- Publication number: Not stated in the supplied extract
- Serial range: Not stated
This Yanmar TNE Series Engine Service Manual is intended for engine rebuilders, agricultural and industrial machinery workshops, fleet technicians and experienced owners carrying out systematic diesel-engine maintenance.
Its combination of specifications, measurements, service limits, fuel-system procedures, dismantling instructions and exploded component drawings makes it a practical workshop reference for supported Yanmar TNE engine variants.
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