Target Audience:
Mechanics and DIY owners seeking to repair or maintain their Yanmar YM155/YM155D tractor
Value Proposition:
Comprehensive, step-by-step procedures and diagrams at an accessible price point for effective self-service
Ease Of Use:
Prepared with simple explanations to facilitate understanding for personnel with varying levels of experience
Completeness:
Described as 100% complete and intact, with no missing or corrupt pages/sections
Accessibility:
Instant PDF download provides immediate access without shipping delays or costs
Engine Systems:
Engine diagnostics, removal, installation, disassembly, assembly, cooling system, lubrication system, fuel system (carburetor/injection depending on variant), ignition system (if applicable)
Drivetrain Systems:
Transmission (gearbox), clutch, differential, drive axles, PTO (Power Take-Off) system
Chassis Systems:
Steering system, braking system, hydraulic system (lift arms, three-point hitch), front and rear axles, wheel bearings
Electrical Systems:
Wiring diagrams, lighting, starting system, charging system (alternator/generator), battery maintenance, starter motor, electrical component testing
Bodywork And Operator Station:
Fender removal/installation, seat adjustments, control levers, dashboard indicators
Maintenance Procedures:
Scheduled maintenance, fluid changes (engine oil, transmission oil, hydraulic fluid), filter replacements, lubrication points, pre-operation checks
Repair Procedures:
Detailed step-by-step repair instructions for all covered systems, component replacement, seal replacement
Adjustment Procedures:
Valve lash adjustment, brake adjustment, clutch adjustment, hydraulic pressure adjustments, PTO engagement adjustments
Troubleshooting Procedures:
Diagnostic flowcharts, symptom-based troubleshooting, common problem identification and solutions
Disassembly Assembly:
Complete instructions for taking apart and reassembling major components and sub-assemblies
Depth:
Comprehensive Workshop Level
Detail Level:
Step-by-step instructions with clear explanations and pictorial diagrams
Special Tools:
Reference to specific Yanmar special service tool numbers and their usage
Specifications:
Includes crucial service data, factory specifications, and allowable limits for measurements and adjustments
Diagrams Illustrations:
Exploded diagrams, detailed drawings, and photographs to guide repair procedures
Model Designation:
YM155 / YM155D (specific engine model likely detailed within manual)
Horsepower:
Likely in the 15-20 HP range (specific to model variant, detailed in manual)
Engine Type:
Diesel (typical for Yanmar tractors of this era)
Injection Type:
Direct Injection or Indirect Injection (specific to engine model)
Cooling Method:
Liquid-Cooled (typical for this tractor class)
Oil Type:
Diesel Engine Oil (specific grade and viscosity to be detailed in manual, e.g., API CD/CF or similar)
Transmission Type:
Manual Transmission (likely with multiple forward and reverse gears)
Gear Configuration:
Likely a constant mesh gear system with a shuttle shifter or sliding gears
Clutch Type:
Single Plate Dry Clutch
Drive Configuration:
2WD or 4WD (YM155D likely signifies 4WD, detailed in manual)
Pto System:
Rear Power Take-Off (PTO) with standard RPM (e.g., 540 RPM)
Operating Weight:
Varies by configuration, likely in the 1000-1500 kg range (specifics in manual)
Weight Distribution:
Front and Rear axle weights (detailed in manual for stability calculations)
Wheelbase:
Varies by model, typically around 1500-1700 mm (specifics in manual)
Ground Clearance:
Sufficient for agricultural use, detailed in manual
Operator Safety Emphasis:
Manual includes safety precautions, DANGER, CAUTION, and NOTE remarks
Brake Type:
Mechanical Drum Brakes (typical for this class, though disc brakes may be present on some variants)
Parking Brake:
Mechanical Parking Brake system
Roll Over Protection:
ROPS (Roll-Over Protective Structure) is often an option or standard on later models, but may not be explicitly covered unless fitted. Manual emphasizes safe operation.
Seatbelt:
Seatbelts may be fitted depending on the original configuration and regulatory requirements.
Dashboard Features:
Basic analog gauges for engine temperature, oil pressure, fuel level, and tachometer. Warning lights for charging system, oil pressure, etc.
Operator Controls:
Manual operation of steering, clutch, throttle, gear selection, PTO engagement, and hydraulic controls.
Diagnostic Ports:
Likely limited to basic electrical testing points, no advanced OBD-II style diagnostic ports.
Engine Oil Change:
Typically every 100-250 operating hours, or annually (specific interval in manual)
Transmission Hydraulic Fluid Change:
Often at 250-500 operating hours or every 1-2 years (specific interval in manual)
Air Filter Cleaning Replacement:
As needed based on operating conditions, typically checked every 50 hours and replaced annually or more frequently if dirty.
Hydraulic Fluid Type:
Yanmar specific hydraulic oil or equivalent UTF (Universal Tractor Transmission Fluid) meeting Yanmar specifications. Capacity and grade detailed in manual.
Coolant Type:
Ethylene Glycol based antifreeze/coolant mixture with appropriate water ratio for operating temperature. Capacity and mixture ratio in manual.
Common Wear Items:
Clutch wear, hydraulic pump seals, PTO clutch engagement issues, starter motor reliability, minor electrical gremlins (common for tractors of this age). Manual addresses troubleshooting.
Preventative Maintenance Importance:
Manual stresses following periodic maintenance for longevity and reliability, highlighting the importance of using correct lubricants and parts.
Manufacturer History:
Yanmar is a Japanese company with a long history in diesel engines and compact construction and agricultural equipment.
Tractor Lineage:
The YM series represents Yanmar's line of compact tractors, designed for small farms, landscaping, and general utility work.
Production Era:
The YM155 series likely falls within the late 1980s to early 1990s production period for Yanmar's compact tractor offerings.
