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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 » SD7 Crawler Bulldozer

Crawler Bulldozer

SD7 Crawler Bulldozer

SD7 bulldozer refers to 230 horsepower track-type dozer with elevated sprocket, hydraulic direct drive, hydraulic control, and semi-rigid suspended. It can be equipped with straight tilt blade, angle blade, coal pushing blade, single shank ripper, and three shanks ripper. The cab is ROPS with air conditioner.

Elevated sprocket bulldozer integrates modern science into it. And its new structure, good performance, high working efficiency, safe and comfortable operation condition, reliable entire quality, excellent service are all your wise considerations.

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 2100rpm
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 Torque converter is 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.

Torque converter
Torque converter installed in SD7 bulldozer is power separating hydraulic-mechanic type.

Transmission assembly
A crawler bulldozer integrates center drive, transmission and variable-speed control valve into one component. It can be assembled or disassembled as an assembly or as a part. It is very convenient for daily maintenance. Transmission, multi-stage planetary gear drive, is designed to realize modular assembling and disassembling. Through multi-functional control valve, the shift can be changed among 1st gear, 2nd gear, 3rd gear forward or reverse rapidly.

Steering and braking clutch
Steering clutch and braking clutch are adjustment free, oil-type, and multi-disc clutch.
The steering clutch is hydraulic pressed, non-constant engaged clutch. And braking clutch is pressed by spring, separated hydraulically, constant meshed type. The action of steering and braking is combined, operation manually to realize steering slowly, sharply and braking. The braking of entire machine can be realized by the pedal. Parking braking rod is designed to keep the undercarriage system in braking condition when starting the engine. The braking rod also can guarantee the machine not to slip on slope when starting the crawler bulldozer.

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

ROPS with air conditioner cab
The cab comes with hexagonal thin wall box-type structure. Glass is mounted at six sides with wide viewing area. Pulling and pushing glass is installed at back side.

Top-mounted air conditioner offers the functions of cooling and heating. Rigid ROPS can protect the driver efficiently when the bulldozer is in special condition.

Implement hydraulic system
Implement hydraulic system is able to control lifting, lowing and tilting of the blade. It also can control lifting, lowing of the ripper. It mainly consists of oil pump, cylinder, inlet valve group diverter valve group, oil tank line and controlling parts.

Hydraulic system of the machine
It consists of oil pump, transmission control valve, steering and braking control valve, and sequence valve, relief valve at torque converter outlet, filter and lines.

Left and right undercarriage system
The track is triangle shape and the sprocket is elevated. There are two idlers in front and at rear of the frame and seven track rollers. Cylinder adjuster and recoil spring are mounted at the undercarriage. The rear end of undercarriage frame is supported on the pivot. The front end is articulated with the equalizer bar. Choose different undercarriage system according to different implements. The consumer is required can guarantee center gravity of the machine to be at best efficient position. Furthermore, choosing different width of track shoe can ensure the bulldozer developing its optimum traction efficiency.

Optional implement and components (*ordinary)
1) Cab
A、ROPS with air conditioner cab   *
B、ROPS cab
C、ROPS canopy
2) Front mounted implement
A、straight tilt blade *
B、Angle blade
C、U-type blade
3) Rear mounted implement
A、single shank ripper     *
B、three shanks ripper
C、back drawing mechanism
4) Optional track shoe width
A、510mm B、560mm *
C、660mm D、914mm
5) Winch dozer used in forest, desert dozer, LGP dozer, HW dozer can be chosen according to special requirements of customer.

We are a specialized crawler bulldozer supplier in China. We provide various types of products such as semi trailer, compressed garbage truck, water tank truck, and truck crane.

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