SD7 bulldozeris 220 horsepower track-type dozer with elevated sprocket, CAT licensed diesel engine, hydraulic direct drive, semi-rigid suspended and hydraulic controls. It can be equipped with straight tilting blade, angle blade, coal pushing blade, single shank ripper, three shanks ripper. The cab is Rops with air conditioner. Optional: 1)Cab: Rops with air conditioner Cab, rops cab, rops canopy; 2)Front mounted implement: Straight tilting blade, angle blade, U-type blade, coal pushing blade; 3)Rear mounted implement: single shank ripper, 3 shanks ripper; Operation weight: 23.8 T. Engine model: C6121ZLG83B (under CAT 3306 diesel engine license) Specification dozertilt operation weight (kg)23800 max drawbar pull (KN)209.92 ground pressure (kpa)71.9 track gauge (mm)1980 min ground clearance (mm)404 gradient3 0 ° /25 ° dozing capacity(m3)8.4 blade width (mm)3500 max digging depth (mm)498 overall dimension (L*W*H)5677*3500*3402mm (with ripper) engine typeC6121ZLG83B (under CAT 3306 diesel engine license) rated revolution2100 Flywheel power(kw)169 max torque (N.m/rpm)1097 / 1500 rated fuel consumption (g/kw.h)< 235 implement hydraulic system max system pressure (Mpa)18.6 pump typehigh pressure gear pump system output (L/min)194 undercarriage system typethe track is triangle shape .the sprocket is elevated number of track rollers (each side)7 pitch (mm)216 width of shoe(mm)560 gear forward km/h 1st0-3.9 2nd0-6.5 3rd0-10.9 gear backward km/h 1st0-4.8 2nd0-8.2 3rd0-13.2 Transmission system torque convertertorque conver is power separating hydraulic-mechanic type transmissionplanetary, power shift transmission with three speeds forward and three speeds reverse ,speed and direction can be quickly shifted steering clutchthe steering clutch is hydraulic pressed , non-constant engaged clutch steering brakethe braking clutch is pressed by spring ,separated hydraulic ,constant meshed type final drivethe final drive is two-stage planetary reduction gear mechanism, splash lubrication.