Part of the Yanmar Repair Manuals.
Split a Yanmar YM135 at the clutch housing without the factory separation diagram and you find out fast what a guess costs: a second teardown, another gasket set, and a week the hay would not wait for. This service manual (Yanmar publication AOD1048) walks the YM135, YM135D, YM155, and YM155D diesel tractors, with the 2T73A and 2TR13A two-cylinder engines, from tractor separation through engine rebuild, transmission and P.T.O. shaft assembly, hydraulic lift, brakes, steering, and front axle.
It covers machines both before Serial No. 51000 and after Serial No. 51001, and notes where their specs differ, such as the charging system.
All 159 pages download as a PDF that is yours to keep for the life of the tractor: print the torque tables for the bench, keep the wiring diagram in the cab, and get back in the field.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Foreward | 2 | |
| Nomenclature | 5-8 | Muffler, Brake Pedal, Instrument Panel, Steering Wheel, P.T.O. Shaft, Front Axle |
| Specifications | 9-22 | Engine, Electrical System, Clutch, Transmission, Running Gear, Brakes |
| Tractor Separation | 23 | Special Stand, Assembly Stand, Separation Diagram |
| Disassembly Sequence | 24-34 | Installation Stand, Tires, Transmission Case, Fender, Instrument Panel, Front Axle |
| Engine Disassembly | 35-38 | Cylinder Head, Gear Case, Fuel Injection Pump, Piston Assembly, Crankshaft, Camshaft |
| Engine Construction & Maintenance | 39-58 | Cylinder Liners, Pistons, Crankshaft, Camshaft |
| Engine Assembly | 59-64 | |
| Engine Adjustments | 65-68 | Governor Linkage, Valve Clearance, Fuel Injection Timing, Fan Belt Tension, Air Venting, Other Measurements and Inspections |
| Electrical Equipment | 69-82 | Battery, Governor & Current Limiter, Characteristics, Cautions During Handling and Assembly, Instructions for Disassembly and Assembly, Maintenance and Inspection, Starter Motor |
| Tractor Construction & Maintenance | 83-106 | Clutch and Relevant Items, Transmission and Related Items, Brake, Hydraulic Lift Device, Steering, Front Axle and Rear Axle |
| Tractor Assembly | 107-144 | Transmission Assembly (P.T.O. Driving Shaft Assembly, P.T.O. Fork Shaft Assembly, Front P.T.O. Shaft Assembly, Front P.T.O. Shift Shaft Assembly, Driven Shaft Assembly, Counter Shaft Assembly, Low-High Shift Shaft Assembly, Main Change Shaft Assembly, Fork of the 2nd/3rd Speed Shift Shaft Assembly, Reverse/1st Speed Shift Shaft Assembly, Main Shaft and Transmission Front Cover Assembly, Gear Shaft Lever Assembly, P.T.O. Reduction Shaft Assembly, Connecting Shaft Assembly, P.T.O. Shaft Assembly, Differential Lock Shaft Assembly, Final Reduction Pinion and Rear Axle Shaft Assembly, Differential Device, Disassembly, Cam, Differential Lock Assembly) |
| Tractor Adjustments | 145 | Clutch and Related Items, P.T.O. and Related Items, Brake and Related Items, Hydraulic Equipment, Steering System |
| Troubleshooting | 146-153 | Engine and Related Items, Electrical System, Brake System, Clutch and Related Items, Transmission and Related Items, Hydraulic System |
| Regular Inspection | 154 | Greasing, Replace Engine Lubricating Oil |
| Tightening and Torques | 155-156 | Cylinder Head Nuts, Rod Bolts, Crankshaft Pulley, Clutch Housing, Transmission Case Nuts, Front Axle |
| Maintenance Equipment & Tools | 157-158 | Hydrometer, Micrometer, Cylinder Gauge, Disassembly Stand, Spring Pin Removing Tool, Garage Jack |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Relief valve pressure (safety valve pressure) | 1138 psi (80 kg/cm²) | p. 96 |
| Remedy for faulty relief valve | Adjust setting | p. 152 |
| Current limiter model | RS2130 (KOKUSAN) | p. 71 |
| Generator model | GP8108 (KOKUSAN) | p. 71 |
| Injection timing | 24°±1° before T.D.C. | p. 9 |
| Injection pump type | Yanmar Bosch PFR 2K | p. 9 |
| Steering system type | Ball-screw | p. 98 |
| YM155, YM155D | ||
| Battery model (YM155, YM155D) | Y60-S4LP | p. 69 |
| Steering gear ratio | 18.9:1 | p. 98 |
| YM135, YM135D | ||
| Battery model (YM135, YM135D) | Y60-S4P | p. 69 |
| After Serial No. 51001 | ||
| Current limiter voltage | 14.5V | p. 69 |
| Charging generator capacity | 12V-8.5A | p. 71 |
