Part of the Doosan Repair Manuals.
Looking for the Doosan DX15, DX18 shop manual PDF? All 513 pages of this factory shop manual (OEM #K1043970AE) cover your DX15 or DX18 track excavator, from track assembly to boom and bucket. You get complete hydraulic schematics tracing the main pump, main control valve, swing motor, travel motor, and pilot joystick circuits, plus full electrical schematics for hunting shorts through the harness. Inside: a full standard torque section, engine teardown procedures, center joint and cylinder rebuilds, and general maintenance intervals. Sprocket mounting bolts get 6.5 kg-m (47 ft lb); pull the 1/2-inch split flange bolts to 15-18 ft lb before you button up the final drive. No more chasing hydraulic gremlins through forum threads. Bookmarked and keyword-searchable; pull it up on your phone next to the machine and get to work.
What's Inside This Doosan DX15, DX18 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 5-34 | Track Excavator Safety |
| Specifications | 35-62 | Specification for DX15/DX18 |
| General Maintenance | 63-100 | General Maintenance Procedures, Standard Torques |
| Upper Structure | 101-102 | - |
| Lower Structure and Chassis | 103-130 | Track Assembly |
| Engine and Drive Train | 131-266 | Engine |
| Hydraulics | 267-458 | Center Joint, Cylinders, Swing Motor, Travel Motor, Pilot Control Valve, Main Pump, Main Control Valve, Solenoid Valve |
| Electrical System | 459-481 | Electrical Schematic (DX15/DX18) |
| Attachments | 482-513 | Boom and Arm, Bucket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Split Flange 1/2" (Bolt 5/16") | 2.1 - 2.5 kg•m (15 - 18 ft lb) | p. 94 |
| Split Flange 3/4" (Bolt 3/8") | 3.0 - 3.7 kg•m (22 - 27 ft lb) | p. 94 |
| Sprocket Mounting Bolt Tightening Torque | 6.5 kg•m (47 ft lb) | p. 118 |
| Motor Mounting Bolt Tightening Torque | 6.5 kg•m (47 ft lb) | p. 118 |
| Fuel filter relief valve opening pressure | 1.0 ±0.2 kg/cm2 (14.2 ±2.8 psi) | p. 202 |
| Starter nominal output | 12 V X 1.2 kW | p. 228 |
| Dynamo charging performance | 14 A (at 14 V / 5200 rpm) | p. 229 |
| Alternator nominal output | 12 V X 40 A | p. 229 |
| Glow Plug Relay coil resistance | 13 Ω | p. 229 |
| Control Timer Unit input voltage | 9 - 15 V DC | p. 229 |
| Pinion gap | 0.5 - 2.0 mm | p. 234 |
| Tightening torque for cover hex socket bolt | 55 ~ 69 Nm | p. 408 |
Doosan DX15, DX18 Common Problems This Manual Covers
Doosan DX15 engine cranks slowly or won't start, battery goes dead after sitting overnight
Check battery terminals and the ground strap before condemning the starter. Test the charging side next: page 247 calls the no-load reading normal when it holds steady at about 15.0 V with alternator speed at 5000 rpm or more, and gives the regulator continuity checks on the same page. If the starter still drags, bench test it — page 234 measures pinion gap against a 0.5 to 2.0 mm standard.
Manual Section: Engine and Drive Train p. 247Bucket and boom move slow and jerky, hydraulics get weak once the oil warms up
Check hydraulic oil level first; a low reservoir pulls air into the pump and makes it growl. Verify system pressure with a gauge against the 210 kg/cm2 (3,000 psi) main relief spec on page 58. If pressure won't build, inspect the suction line for collapse and replace clogged filters before blaming the pump.
Manual Section: Main Pump Troubleshooting p. 58Hydraulic oil weeping at hose fittings and split flange connections on the boom
Clean the fitting and confirm the leak path before reaching for a wrench; overtightening a split flange pinches the O-ring and makes it worse. Replace the O-ring, then tighten evenly in a cross pattern to the torque table for the fastener you are actually working on — page 94 is the hose-clamp chart, and the standard torque tables sit in the General Maintenance section, pages 63 to 100.
Manual Section: Hydraulics p. 94Tracks loose, jumping sprocket teeth, or grinding noise from the undercarriage when turning
Check track tension first and adjust it at the grease fitting; a slack track walks off the idler on side slopes. Then measure the undercarriage against the wear tables in the Lower Structure section: page 114 gives track frame limits, page 115 the idler, page 116 the track roller, and page 118 the sprocket — tooth width 22.0 mm new, 16.0 mm rebuild-or-replace limit. Replace anything past its limit and check the sprocket bolts.
Manual Section: Lower Structure and Chassis p. 114Machine loses travel power on one side, travel motor whines or ratchets under load
Drain the travel motor gearbox and inspect the oil for metal particles; glitter means internal wear, not just old oil. Refill with what page 335 specifies — SAE 30-CD diesel engine oil or an equivalent gear oil, drained completely and not mixed. Test the travel circuit with a gauge; if pressure won't reach relief, suspect internal motor leakage. Torque the motor mounting bolts to the table on page 334 on reassembly.
Manual Section: Travel Motor Troubleshooting p. 335Frequently Asked Questions
What are the replacement specifications for the battery and cables?
For 24-volt battery units consisting of two series-connected 12-volt batteries, booster or charger cable connections must be made between the non-series connected positive terminals and between the negative terminal of the booster battery and the metal frame of the machine. Always connect the positive cable first when installing cables and disconnect the negative cable first when removing them. p. 23
What is the tightening torque for the cylinder head bolts on the engine?
For the engine, the M10 cylinder head bolts should be tightened to 7.5 - 8.5 kg•m (54 - 61 ft lb), and the M8 bolts should be tightened to 2.0 - 3.0 kg•m (14 - 21 ft lb). p. 150
What is the standard valve clearance for the engine?
The standard valve clearance for both intake and exhaust valves on the engine is 0.25 mm (0.0098 in) when the engine is cold. p. 151
What is the engine oil capacity for the L3 engine model?
The L3 engine model has an oil capacity of 3.0/1.5 liters (0.79 - 0.40 U.S. gal.) for the upper/lower limit, or 3.6/1.8 liters (0.95 - 0.48 U.S. gal.), or 4.8/3.0 liters (1.3 - 0.79 U.S. gal.) depending on the specific configuration. p. 148
What is the injection start pressure for the engine nozzles?
The standard injection start pressure for the engine nozzles is 140 kg/cm² (1,990 psi). p. 156
How will I receive this Doosan DX15 Shop Manual?
This is a 513-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Is this Doosan DX15 manual print-friendly?
Yes, printing is unrestricted: a single page, a chapter, or the lot, on letter or A4.
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