Track Type Dozer with Ripper , Elevated Sprocket Heavy Equipment
Bulldozer
335HP Power Big Crawler Bulldozer SD8B for Engineering Construction
and Mining with CAT technology
SD8B is elevated sprocket, track-type bulldozer. Its undercarriage
system is elastic suspended, elevated sprocket, hydraulic direct
drive, and hydraulic controls. SD8 dozer can be equipped with
S-blade, single shank ripper. Main structure uses high strength
plate and is suitable for working in stony, worse earth condition.
The cab is installed ROPS device and comfortable seat.
Main specifications
Operating weight(not including ripper) | 40000 kgs |
Ripper weight | 4300 kgs |
Engine flywheel power/RPM | 246 kw(335HP)/1900r/min |
Track ground contact length | 3280 mm |
Ground pressure(without ripper) | 105 kPa |
Track contact length | 2200 mm |
Overall dimensions(L × W × H) | 8090 × 4172 × 3952(with single shank ripper) |
Grade ability | latitude30 ° transverse 25 ° |
Ground clearance | 485mm |
Theory travel speed (km/h) |
1st gear forward 0-3.9 | 1st gear backward 0-4.8 |
2nd gear forward 0-6.8 | 2nd gear backward 0-8.4 |
3rd gear forward 0-11.9 | 3rd gear backward 0-14.8 |
Dozing operating rate (moving distance 40m ) | 452m 3 /h |
Diesel engine specifications |
Model | NTA855-C400 (BC III) |
Type | water cooled, single line, four strokes, turbocharged, 6-cylinders, |
Rated speed | 1900r/min |
Flywheel power | 246kw(335HP) |
Torque storage coefficient | 24.5% |
Start mode | 24v electric starting |
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Steering and braking clutch
Steering and braking clutch are adjustment-free, oil-type,
multi-disc clutch. The braking clutch is pressed by spring,
separated hydraulic, 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. The braking of entire machine can be
realized through the pedal. Braking rod is designed to keep the
undercarriage system in braking condition and guarantee the machine
not to slip on slope when starting the engine.
Torque converter
Power separating, hydraulic-mechanic drive, single stage torque
converter is used in SD8 elevale sprocket bulldozer.
Transmission assembly
It integrates center drive, transmission and speed changing control
valve into one component. It can be assembled or disassembled as
assembly or as a part. It is very convenient to service.
Transmission is multi-stage planetary drive to realize modular
assembling and disassembling. Gear the shift can be changed among
1st gear, 2nd gear, 3rd gear forward or reverse rapidly, through
multi-functional control valve.
Final drive
Final drive is two-stage planetary reduction gear mechanism. It is
mounted at outside of steering and braking clutch. Combined
sprocket segment is very convenient for assembling, disassembling
and service.
Undercarriage system
SD8 dozer utilizes elastic-mounted undercarriage. The track is
triangle shape. The sprocket is elevated. Through floating function
of continuous auxiliary suspension device, the machine can travel
near obstacle on the ground to improve travelling stability and
comfortable of the driver. Ground contact area is increased.
Performance of travelling and traction is raised.
ROPS cab
The cab is hexagonal thin wall box-type structure. 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 requirement of customer. The structure of Rops is rigid. It can
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 has a good
front and rear sighting range.
Implement hydraulic system
Implement hydraulic system can control lifting, lowering and
tilting of the blade. It also can control the moving of ripper. It
mainly consists of oil pump, cylinder, valve group, oil tank line
and controlling parts. Implement pump is two group vane type pump.
The main specification is as following:
Front pump | Displacement | 129ml/r | Rear pump | Displacement | 56ml/r |
Rated pressure | 21MPa | Rated pressure | 21MPa |
Rated speed | 2000r/min | Rated speed | 2000r/min |
Rated operation pressure of blade lifting system | 17.5MPa | Rated operation pressure of tilting system | 18.3MPa |
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, filler and oil line, etc. Main pump is three group
gear pump. The main performance is as following:
Lubricating pump | Rated displacement | 90ml/r | Working pump | Rated displacement | 115ml/r |
Rated pressure | 0.4MPa | Rated pressure | 3.1MPa |
Rated speed | 2000r/min | Rated speed | 2000r/min |
Oil draining pump | Rated displacement | 160m/r |
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Rated pressure | 0.5MPa |
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Rated speed | 2000r/min |
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Maintenance filling capacity
Fuel tank | 753L | Final drive (one side) | 23L |
Water tank and diesel engine cooling water | 125L | Rear seat buffer spring case (each side) | 30L |
Camshaft case of diesel engine | 47L | Pivot lubricating | 13L |
Bevel gear case hydraulic system of tractor | 167L | Implement system oil tank | 89L |
Blade | Type | s-blade | Ripper | Type | single, adjustable hydraulic ripper |
Height | 1765 mm | Rippering angle | 45 ° |
Width | 4172 mm | Max. penetration | 1150mm |
Capacity | 13.0 m 3 |
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Max. lifting height 830mm
Blade type | Ground contact length(A) | Overall Length (B) | Blade height (C) | Overall height (D) | Blade width (E) | Track center distance(F) | Penetrating length | Lifting height | Blade capacity |
Straight tilting blade(s-blade)
(with ripper) | 3280 | 8090 | 1765 | 3952 | 4172 | 2200 | 614 | 1288 | 13.0 |
Straight tilting blade(S-blade)
(with traction mechanism) | 3280 | 6755 | 1765 | 3952 | 4172 | 2200 | 614 | 1288 | 1 |
