Part of the Doosan Repair Manuals.
This 836-page Doosan DX27Z, DX30Z, DX35Z shop manual PDF (OEM #K1036951E) tears into the whole track excavator lineup, from swing bearing and track assembly to the main pump and main control valve. You get hydraulic schematics with complete fluid routing for the travel motor, swing motor, and remote control valve, plus electrical schematics for chasing wiring faults back to the source. Step-by-step procedures walk you through cylinders, the center joint, the accumulator, and the working attachments, right down to the bucket. Check link pitch against the 101.6 mm standard (104 mm wear limit), and pull M24 Grade 12.9 fasteners to 103 kg-m (745 ft lb). Your excavator is down, and forum guesses won't lift it. Bookmarked with a real text layer, so you can jump to any section, search any spec, and start wrenching.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 5-50 | Track Excavator Safety |
| Specifications | 51-76 | Specification for DX30Z |
| General Maintenance | 77-114 | General Maintenance Procedures, Standard Torques |
| Upper Structure | 115-132 | Cabin, Swing Bearing |
| Lower Structure and Chassis | 133-162 | Track Assembly |
| Engine and Drive Train | 163-452 | Engine, Drive Coupling (Main Pump) |
| Hydraulics | 453-774 | Accumulator, Center Joint, Cylinders, Swing Motor, Travel Motor, Main Pump, Main Control Valve (Remote Control Valve, Travel Control Valve, Pedal Valve, Hydraulic Schematic) |
| Electrical System | 775-810 | Electrical Schematic (DX27Z/DX30Z) |
| Attachments | 811-836 | Working Attachments, Bucket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Standard Metric Fasteners Torque (M5 x Std, Grade 3.6) | 0.15 kg•m (1.08 ft lb) | p. 104 |
| Standard Metric Fasteners Torque (M24 x 2.0, Grade 12.9) | 103.00 kg•m (744.99 ft lb) | p. 104 |
| Track tension adjustment grease injection | 10~15mm | p. 143 |
| Link Pitch Standard | 101.6 mm | p. 144 |
| Link Pitch Limit | 104 mm | p. 144 |
| Bucket end play clearance | 0.2 - 0.7 mm (0.008 - 0.027 in) | p. 835 |
| Main Relief Pressure | 210 kg/cm2 | p. 66 |
| Fuel Tank Capacity | 35 L | p. 66 |
| Hydraulic Tank Capacity | 35 L | p. 66 |
| Swing Speed | 9.7 rpm | p. 66 |
| Operating Weight | 3.18 tons | p. 66 |
| Engine Rated Power | 18.1 kW | p. 66 |
