Part of the Doosan Repair Manuals.
Searching for a Doosan DX85R-3 shop manual PDF that actually covers the whole machine? All 916 pages of this factory shop manual (OEM #950106-01030E) walk you through the DX85R-3 excavator, from swing bearing and cabin to travel device and bucket. Inside: full hydraulic schematics for the main pump, control valves, and swing circuit, complete electrical diagrams covering starting, charging, and engine control, plus exploded views and a standard torque section that ends fastener guesswork. You get real factory test numbers, not approximations. Set the LS relief at 285 kg/cm2 (4,054 psi), main system pressure at 300 kg/cm2 (4,267 psi), and replace track pins once clearance passes 2.0 mm. Your excavator is down, and forum threads won't lift it. Bookmarked with a full text layer: search any spec, jump to any section, get wrenching.
What's Inside This Doosan DX85R-3 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 5-72 | Track Excavator Maintenance Safety |
| Specifications | 73-96 | Specification for DX85R-3 |
| General Maintenance | 97-134 | Standard Torques |
| Upper Structure | 135-162 | Cabin, Swing Bearing |
| Lower Structure and Chassis | 163-208 | Track Assembly |
| Engine and Drivetrain | 209-468 | Engine, Drive Coupling |
| Hydraulics | 469-812 | Accumulator, Center Joint, Cylinders, Swing Device, Travel Device, Main Pump, Main Control Valve, Remote Control Valve |
| Electrical System | 813-890 | Electrical Supply System, Engine Starting, Engine Preheating System, Charging System, Instrument System, Engine Control System |
| Attachments | 891-916 | Boom and Arm, Bucket |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| LS Relief Set Pressure | 285 kg/cm2 (4,054 psi) | p. 88 |
| System Pressure (Working/Traveling) | 300 kg/cm2 (4,267 psi) | p. 88 |
| Steel Track Pin Clearance Standard | 0.29 mm | p. 176 |
| Steel Track Pin Clearance Limit | 2.0 mm | p. 176 |
| Bolt tightening torque | 14 kg•m (101.26 ft lb) | p. 205 |
| Engine Rated Output (Net) | 43.6 kW | p. 88 |
| Fuel Tank Capacity | 110 liters | p. 88 |
| Hydraulic System Pressure (Working/Traveling) | 300 kg/cm2 | p. 88 |
| Swing Speed | 9.5 rpm | p. 88 |
| Travel Speed (High) | 4.7 km/h | p. 88 |
| Main Relief Pressure | 300 kg/cm2 | p. 92 |
Doosan DX85R-3 Common Problems This Manual Covers
Doosan DX85R-3 no hydraulic functions, loud grinding noise from main pump under load
Check hydraulic oil level and top up before the pump runs dry. Test main relief pressure against the 300 kg/cm2 (4,267 psi) spec on page 92. Verify pump pressure control at the 280 bar standard and flow control at 18 bar on page 640. Replace hydraulic filters if metal shows on the element.
Manual Section: Hydraulics p. 92Engine cranks but only runs at low speed, stalls under load in cold weather
Drain water from the fuel filter and replace both fuel filters if the machine stalls after refueling. Check engine oil viscosity matches the ambient temperature. Test injectors for dirty spray patterns; the engine should reach its rated 43.6 kW output with clean fuel delivery. Follow the engine service procedures starting on page 209.
Manual Section: Engine and Drivetrain p. 209Track tension won't hold adjustment, tracks loosen again after a few hours of digging
Clean packed mud from the track frame before adjusting tension. Measure track pin clearance; standard is 0.29 mm and the wear limit is 2.0 mm per page 176. Check bushing thickness too, replacing at 39.5 mm against the 41.26 mm standard. Inspect the adjuster cylinder seal for grease leaks and torque roller bolts to 14 kg•m (101.26 ft lb).
Manual Section: Lower Structure and Chassis p. 176Swing bearing groans and feels rough when slewing, play developing in the upper structure
Grease the swing bearing and gear on schedule, and rotate your digging position so wear spreads around the bearing instead of loading one quadrant. Time a full slew; a healthy machine swings at 9.5 rpm. Follow the bearing inspection steps in the Upper Structure service procedures starting on page 144.
Manual Section: Upper Structure p. 144All hydraulic functions slow and weak, oil runs hot, pump whines at full throttle
Test pump output; maximum discharge is 162 liter/min (43 U.S. gpm) per the specifications on page 88. Check the pressure control setting against the 280 bar standard and flow control against 18 bar on page 642. Replace hydraulic filters and inspect the main control valve for stuck spools if flow tests low with clean oil.
Manual Section: Hydraulics p. 642Frequently Asked Questions
What are the torque specifications for the track assembly on the DX85R-3?
The track tension grease valve should be tightened to 59 - 88 Nm (43 - 65 ft lb) after adjustment. The sprocket mounting bolt tightening torque is 18 kg•m (130 ft lb) for M14 x 2.0 bolts, and the motor mounting bolt tightening torque is 27 kg•m (195 ft lb) for M16 x 2.0 bolts. p. 173
What are the replacement specifications for fuel filters on the DX85R-3 engine?
The fuel filter should be replaced every 500 hours of operation. When installing a new fuel filter, tighten it to 20 - 24 Nm (2.0 - 2.4 kg•m) or one additional turn using a filter wrench. p. 291
What is the cylinder head bolt tightening procedure for the DX85R-3 engine?
The cylinder head bolts should be tightened in two steps. The first step is to 1/2 of the final torque, and the second step is to the final torque, following the sequence shown in Figure 135. p. 327
What is the standard valve clearance for the DX85R-3 engine?
The standard intake and exhaust valve clearance for the DX85R-3 engine is 0.006 - 0.010 inches (0.15 - 0.25 mm) when the engine is cold. p. 300
What is the engine coolant capacity for the DX85R-3?
The engine coolant capacity for the 4TNV98C engine is 4.4 quarts (4.2 liters). p. 269
What format is this Doosan DX85R-3 manual in?
Immediate download of the complete 916-page searchable Shop Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Am I able to print pages from this Doosan DX85R-3 manual?
Printing is allowed without restriction. Pull the pages you need for the job and bin them when they get greasy.
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