SD7N Bulldozer

Quick Description

SD7N bulldozer is 248 horsepower track-type dozer with elevated sprocket, power shift drive, semi-rigid suspended and pilot hydraulic control. It is a medium size bulldozer weighing approx. 23tons integrated with modular design making it easy for repair & maintenance. It relieves oil with difference pressure, the hydraulic system performs protecting environment and save energy with high working efficiency. SD7N Bulldozer is equivalent to Caterpillar Bulldozer D6R, Komatsu D85, BEML BD85.

  • Engine - Chongqing Cummins NT855-C280S10
  • Engine Rated Power(185 KW/248 HP)
  • Operating weight 23, 800 Kg (without Ripper)
  • Pilot joy stick hydraulic control
  • Elevated sprocket
  • ROPS cabin & LED Lights

Sd7n Cummins NT855-C280S10 Sd7n Cummins NT855-C280S10

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Make Chongqing Cummins
Model Chongqing Cummins NT855-C280S10
Type Mechanical injector
Cooling System Type Water cooled
Turbo charged Yes
Rated Power (KW/HP) 185/248
Rated Revolution (rpm) 2100
Maximum Torque (N.m/rpm) 1097/1500
No. of cylinders 6
Bore x Stroke ( mm) 140 x 152
Displacement 14 L
Fan Drive type Mechanical
Min ground clearance(mm) 404
Compression rate 14.5 : 1
Fuel filter 2
Fuel System Type Chongqing Cummins type, mechanical control fuel injection
Alternator 24V / 50A
Starting motor 8.5 KW
Battery Rating 2 x 12V, 120 Ah
LED Lights Yes
Power Train
Torque convertor / Clutch Torque Convertor
Type Power separating hydraulic mechanical type
Transmission/Gear Box Transmission Type
Type / Model Power shift planetary transmission with 3 speeds forward and 3 speed reverse, speed and direction can be quickly shifted
No. of gear forward 3
No. of gear backward 3
Max forward speed 10.9
Max reverse speed 13.2
Maximum drawbar pull 1st gear - 196.8 KN 2nd gear - 172.2 KN
Hydraulic System
Operation type Pilot hydraulic control
Hydraulic pump
Type Gears oil pump
Capacity / Discharge 170 (L/min)
Relief pressure / Max pressure 20 Mpa
Hydraulic cylinders
Type Double acting piston type
Blade jack lift (No. of cylinders/bore x stroke) 2 / 105 x 1308
Blade tilt (No. of cylinders/bore x stroke) 1 / 165.1 x 155
Ripper : (No. of cylinders /Bore x Stroke (mm)) Ripper : 2 / (150 x 480)
Control Valves Type Pilot operated with joystick control
Type The steering clutch is hydraulic pressed usually separated clutch
Steering Control Hydraulically operated
Under Carriage
Track gauge (mm) / Track pitch 1980
Track rollers (each side) 7
Carrier rollers (each side) 1
Track shoes (each side) 40
Shoe width (mm) 560 / 610 (Optional)
Ground pressure 71.9 Kpa including ripper and blade
No. of idler (each side) 2
Engine Replaceable cartridge filter
Transmission One magnetic oil strainer and replaceable element by-pass filter
Steering & Braking One magnetic oil strainer and replaceable element by-pass filter
Hydraulic System Return filter
Operating Mass
Operating mass (kg) (approx.) without ripper - 23800
Blade Specifications - General
BLADE ATTACHMENT 1 - Standard Machine Tilt Semi U blade
Overall length with dozer 5667 With ripper - 7616
Max. lift above ground / height (mm) 1115
Max. drop below ground/ Max digging depth 498
Blade / Dozing Capacity(Cum) 8.4
Mass in (kg) Dozer Blade attachment / Dozing weight 3428 kg
Blade width (mm) 3500
Blade height (mm) 1130
BLADE ATTACHMENT (Optional blade) Coal blade - U type
Overall length with dozer 5667.0
Max. lift above ground / Max lifting height (mm) 1115.0
Max. drop below ground / Maximum digging depth 670.0
Blade / Dozing Capacity(Cum) 9.6
Mass in (kg) Dozer Blade attachment / Dozing weight 3920.0
Blade width (mm) 4428.0
Blade height (mm) 1350.0
Type The braking clutch is pressed by spring, separated hydraulic, meshed type Wet banding structure
Control / Actuation type foot brake, hydraulic booster
CABIN Sealed cabin with air conditioner (optional) with ROPS
INSTRUMENTATION Hour meter, fuel gauge, temperature gauge, battery charge indicator, horn, oil pressure gauge, front light, rear lights, plough lights, indicator lights
ADDITIONAL ATTACHMENTS 1). Stage III engine 2). Air conditioner 3). U blade (Coal blade) 4). 3 shank ripper 5). Single shank ripper 6). Solid waste blade 7). Special machine for solid waste with broad 910mm triangular track plates and solid waste blade with additional protection.
Sd7n Cummins Engine Bulldozer
Sd7n Ripper Bulldozer
Sd7n Ripper Bulldozer
Sd7n working Bulldozer
  • Air Conditioner
  • U-blade (Coal Blade)
  • 3 Shank Ripper.
  • Single shank Ripper
  • Special machine for solid waste with broad 910mm triangular track plates and solid waste blade with additional protection
  • Solid Waste Blade
  • Stage III Engine

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