Develon DX300MH-5

Double tap to zoom



Built for the most demanding tasks
As the largest material handler in the lineup, the Doosan® DX300MH-5 is built for the most demanding material handling functions. It features a fixed 6 ft. cab riser with hydraulic tilt, straight boom and droop nose stick, sandwiched counterweight, rotate grapple ready hydraulics, and additional guarding.

In addition to four power modes, the DX300MH-5 includes lifting work mode, which provides increased pump torque, low engine RPMs, and an automatic power boost.

Improve Productivity
Careful design, high-pressure common rail fuel injection and four valves per cylinder deliver increased torque and efficient fuel consumption. High-capacity pumps improve productivity, while the swing drive provides rapid cycles.

Cooling features of the DX300MH-5 include a variable speed fan and a split cooling system, which utilizes both hydraulic oil and engine coolant.

Tier 4 Technology
To reach Tier 4 emissions standards, the DX300MH-5 incorporates a high-pressure common-rail (HPCR) fuel delivery system as well as cooled exhaust gas recirculation (CEGR) combined with a diesel oxidation catalyst (DOC) and selective catalyst reduction (SCR). Read about our Tier 4 technologies to learn more.


Rated Flywheel Power (Gross) 270.9 hp @ 1,800 rpm
Rated Horse Power (Net) 267 hp @ 1,800 rpm
MAX. TORQUE (NET) 940 lbf·ft @ 1,300 rpm
Engine Emissions Tier (EPA) T4
Hydraulic System  
Main Pump: Displacement 8.42 in³/rev
Control Valve: Relief Valve Pressure (Normal) 4,978 psi
Control Valve: Relief Valve Pressure (Boost) 5,263 psi
Main Pump: Max. Flow Rate (each) 65.51 gal/min
Main Pump: Main Relief Pressure 5,076 psi
Upper Rollers: Quantity Per Side 2
Lower Rollers:  Quantity Per Side 9
Track Length 16' 2"
Track Link: Track Gauge 8' 6"
Swing Mechanism  
Swing Performance: Max Swing Torque 87787 lbf·ft
Swing Performance: Max Swing Speed (At Efficiency) 9.9 rpm
Travel System/Drive Mechanism  
Travel performance: Traction Force (Highest Value) 2,587,738 lbf
Travel performance: Traveling Speed - Low (XXX/) 1.86 mph
Travel performance: Traveling Speed - High (/XXX) 3.29 mph
Travel Performance:  Gradeability 35° @ 70 %
Operating Weight 79,366 lb
Standard Boom Length 25.59 ft
Standard Arm Length 17.72 ft
Shoe Width 2' 7"
Shipping Height - Hose (With Attachment) 11' 4"
Shipping Length (Without Attachment) 36' 1"
Shipping Width (Standard) 11' 1"
Overall Height Over Cab 10' 0"
Working Range  
Max Digging Reach (Ground) 42' 7"
Max Digging Depth 21' 7"
Max Loading Height 46' 3"
Refill Capacities  
Fuel Tank 132.09 gal
Hydraulic System 81.89 gal
Engine Coolant 12.94 gal
Engine Oil 9.51 gal
Hydraulic Tank 43.59 gal
Noise Level:  Guaranteed Sound Power Level 104 dBA
Noise Level:  Operator 71 dBA


WARNING: This product can expose you to chemicals including engine exhaust (including diesel engine exhaust when equipped), lead and lead compounds, mineral oils, soots, phthalates, and carbon monoxide which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.