Part of the Yanmar Repair Manuals.
The clutch on a YM169 sits behind a full tractor split, and the disassembly sequence that gets you there is the kind of thing you want in writing before the machine is in pieces on the shop floor. This Yanmar service manual walks the YM169 and YM169D diesel tractors, both powered by the 3T72HA-A engine, through that job and every other major repair across 202 pages.
Inside are chapters on tractor disassembly, construction and maintenance of the clutch, transmission, brakes, hydraulic lift, steering, and axles, full engine service from teardown to adjustment, electrical equipment, troubleshooting, and a regular inspection checklist. Specifications and tightening torque ratings sit up front; a guessed head torque on an old diesel is an expensive guess.
The PDF carries 46 bookmarks, so you can jump from a symptom to the right chapter in seconds, print the pages you need, and get back in the field.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 7-27 | Specifications, Components, Tightening Torque Ratings, Diagram (Power Train, Front Axle Sectional View, Transmission Sectional View) |
| Tractor Disassembly | 28-37 | Disassembly Sequence |
| Tractor Construction and Maintenance | 38-65 | Clutch and Relevant Items, Transmission and Related Items, Brake, Hydraulic Lift Device, Steering, Front Axle, Rear Axle |
| Tractor Assembly | 66-106 | General Assembly, Transmission Assembly, Front Axle Assembly, Center Pin Assembly, Brake Drum Assembly, Hydraulic System Assembly |
| Tractor Adjustment | 107-110 | Clutch and Related Items, PTO and Related Items, Brake and Related Items, Hydraulic Equipment, Steering System |
| Engine | 111-160 | Disassembly Sequence, Construction and Maintenance, Assembly Sequence, Adjustment |
| Electrical Equipment | 161-186 | Battery, Generator and Current Limiter, Starter Motor, Thermostat, Turn Signal Lights, Water Temperature Indicator Light |
| Tractor Troubleshooting | 187-196 | Engine and Related Items, Electrical System, Clutch and Related Items, Transmission and Related Items, Hydraulic System, Steering and Suspension Systems |
| Regular Inspections | 197-202 | Check List |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Rear wheel bolts torque | 58 – 72 ft·lbs (8.0 – 10.0 kg·m) | p. 16 |
| Battery capacity | 45 AH (20-hour rate) | p. 163 |
| Battery voltage | 12V | p. 163 |
| Starter motor manufacturer | HITACHI | p. 178 |
| Starter motor light running voltage/current | 12V/less than 60A | p. 178 |
| Cooling system type | Water-cooled | p. 10 |
| Thermostat type | SH100-02 (Hitachi) | p. 184 |
| Maximum Engine Output | 16/2600 hp/rpm | p. 9 |
| Hydraulic Control Relief Pressure | 1564 psi (110 kg/cm²) | p. 55 |
