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Shandong Shanglong Economic and Trade Co., Ltd

Manager: Lu Changlin
Tel.: +86-13969123412
Fax: +86-531-83532996

Sales Manager: Yan Haitao
Tel: +86-15254123683
+86-531-83532261
Fax: +86-531-83532996

Sales Manager (SP): Jenny
Tel: +86-15063361051
+86-531-83532261
Fax: +86-531-83532996

Home » Products » Scraper Machine »Crawler Bulldozer » SD8 Crawler Bulldozer

Crawler Bulldozer

 Crawler Bulldozer

SD8 Crawler Bulldozer

SD8 Crawler bulldozer refers to a track-type bulldozer with elevated sprocket and its undercarriage system is elastic suspended, elevated sprocket, hydraulic controls, and hydraulic direct drive. This crawler bulldozer can be equipped with S-blade, single shank ripper. Main component comes with high strength plate, ideal for working in stony, worse earth condition. ROPS device and comfortable seat are placed in the drivers' cab.

Main Specifications

Dozer type Tilt
Operation weight (excluding ripper) 23,800kg
Ground pressure 71.9KPa
Track gauge 1,980mm
Gradient 30°/25°
Min. ground clearance 404mm
Dozing capacity 4.5m³
Blade width 3,500mm
Max. digging depth 498mm
Overall dimension 5,677mm×3,500mm×3,402mm
Engine
Engine type Cummins NTA855-C280S10
Rated revolution 2,100rpm
Flywheel power 169kw
Max. torque 1097/1500N∙m/rpm
Rated fuel consumption ≤235g/kw∙h
Undercarriage system
Type Triangular crawler belt, drive sprocket overhead, semi-rigid suspended.
Number of track rollers (unilateral side) 7
Number of carrier rollers (unilateral side) 2
Pitch 216mm
Width of shoe 560mm
Forward (km/h) 1st: 0-3.9
2nd: 0-6.5
3rd: 0-10.9
Backward (km/h) 1st: 0-4.8
2nd: 0-8.2
3rd: 0-13.2
Executive Hydraulic System
Max. system pressure 18.6Mpa
Pump type High gears pump
System output 194L/min.
Driving system
Torque converter Power separating hydraulic-mechanic type
Transmission Planetary, power shift transmission with three gears forward and three gears reverse, speed and direction can be quickly shifted.
Steering clutch The steering clutch is hydraulic pressed, usually separated clutch.
Braking clutch The braking clutch is pressed by spring, separated hydraulic, meshed type
Final drive The final drive is two-stage planetary reduction gear mechanism, splash lubrication.

Hydraulic system of tractor

It is composed of oil pump, transmission control valve, steering and braking control valve, sequence valve, torque converter outlet relief valve, filter and oil line, etc. Main pump is three group gear pump. The main performance is as following:

Specifications of Diesel Engine

Model NTA855-C400 (BCⅢ)
Type water cooled, single line, four strokes, turbocharged, 6-cylinders, diameter 140mm
Rated speed 1900 r/min
Flywheel power 246kw (335HP)
Torque storage coefficient 24.5%
Start mode 24v electric starting

Torque converter
Power separating, hydraulic-mechanic drive, single stage torque converter is used in SD8 elevated sprocket bulldozer.

Final drive
Final drive is two-stage planetary reduction gear mechanism. It is installed at outside of steering and braking clutch. Combined sprocket segment is very convenient for assembling, disassembling and service.

Transmission assembly
SD8 crawler bulldozer combines center drive, transmission and variable-speed control valve into one system. It can be assembled or disassembled as an assembly or as a part. It is very convenient for daily maintenance. Transmission, multi-stage planetary drive, is ideal for modular assembling and disassembling. You can change the gear shift among 1st gear, 2nd gear, and 3rd gear forward or reverse rapidly, through multi-functional control valve.

Braking and steering clutch
Braking and steering clutch comes with the features of adjustment-free, oil-type, multi-disc. The braking clutch is pressed by spring, separated hydraulically, constant meshed type. Steering clutch is hydraulic pressed, non-constant engaged clutch. Steering and braking acts simultaneously, operated manually to realize steering slowly, sharply and braking. Through the pedal, you realized the braking of entire machine. Designed for keep the undercarriage system in braking condition, braking rod can guarantee the machine not to slip on slope when starting the engine.

Left and right undercarriage system
SD8 dozer uses elastic-mounted undercarriage. The sprocket is elevated. And the track is triangle shape. Through floating function of continuous auxiliary suspension device, the machine can travel near obstacle on the ground to improve traveling stability and comfortable of the driver. In addition, it can increase the ground contact area and raise the performance of traveling and traction.

ROPS cab
The cab comes with the structure of hexagonal thin wall box-type. Its glass is mounted at six sides with wide viewing range. Pulling and pushing glass is mounted at back side. Air conditioner can be installed according to the demands of customer. Rigid ROPS is designed to protect the driver efficiently when the bulldozer is in special condition. Adjustable operator's seat bias to right 15° and fuel tank, engine hood, track are tilting, the driver can be provided with a good front and rear sighting range.

Implement hydraulic system
Implement hydraulic system can control lifting, lowering and tilting of the blade and the moving of ripper. It mainly is composed of oil pump, cylinder, valve group, oil tank line and controlling parts. Implement pump is two group vane type pumps. The main specification is as following:

Shanglong is a China-based crawler bulldozer supplier. We provide a comprehensive range of products, including concrete mixer truck, water tank truck, truck crane, double drum road roller, and more.

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