SD7 BULLDOZER

SD bulldozer are 230 horsepower track-type dozer with elevated sprocket, hydraulicdirect drive, semi-rigid suspended and hydraulic controls. It can be equippedwith straight tilting blade, angle blade, coal pushing blade, single shankripper, three shanks ripper. The cab is Rops with air conditioner.

SD7-230horsepower, elevated sprocket bulldozer integrate modern secience into it, its newstructure, good performance, high working efficiency, safety and comfortableoperation condition, realiable entire quality, excellent service is your wisechoosing.

Main specifications

Operatingweight(not including ripper)--------------------------------------------------------------------------------23800㎏

Ripperweight---------------------------------------------------------------------------------------------------------------3900㎏

Groundpressure(without ripper)----------------------------------------------------------------------------------------71.9kPa

Trackcenter distance ----------------------------------------------------------------------------------------------------1980mm

Gradeability ---------------------------------------------------------------------------------Latitude30 °   Transverse 25°

Groundclearance ----------------------------------------------------------------------------------------------------------404mm

Overalldimensions(L×W×H) ： -------------------------------------5677×3500×3402(with straighttilting blade)

Diesel engine  specifications

Model A-----------------------------------------------------------------------------------------------NT855-C280(Cummins)

Ratedspeed------------------------------------------------------------------------------------------------------------2100RPM

Flywheelpower(speed at 2100 rpm) ----------------------------------------------------------------------------------169kW

Min.Fuel Consumption ---------------------------------------------------------------------------------------≤235(g/Kw.h)

Model B-----------------------------------------------------------------------------------------------C6121ZLG10(Shanghai )

Ratedspeed------------------------------------------------------------------------------------------------------------2100RPM

Flywheelpower(speed at 2100rpm) ---------------------------------------------------------------------------------169kW

Min.Fuel Consumption ----------------------------------------------------------------------------------------≤222(g/Kw.h)

Theorytravel speed    (km/h)

1stgear forward0-3.9                     1st gear backward 0-4.8

2ndgear forward0-6.5                     2nd gear backward 0-8.2

3rdgear forward0-10.9                    3rd gear backward 0-13.2

Dozingoperation rate(moving distance 40m)   350m³/h

Torqueconverter

Torqueconverter used in SD7 bulldozer is power separating hydraulic-mechanic type.

Transmissionassembly

Itintegrates center drive, transmission and speed changing control valve into onecomponent. It can be assembled or disassembled as a assembly or as a part. Itis very convenient to service. Transmission is multi-stage planetary gear driveto realize modular assembling and disassembling. The shift can be changed among1st gear, 2nd gear, 3rd gear forward or reverse rapidly, throughmulti-functional control valve.

Steeringand braking clutch

Steeringclutch and braking clutch are adjustment free, oil-type , multi-disc clutch.The braking clutch is pressed by spring, separated hydraulicly, constant meshedtype. Steering clutch is hydraulic pressed, non-constant engaged clutch. Theaction of steering and braking is combined, operation manually to realizesteering slowly, sharply and braking. The braking of entire machine can berealized through the pedal. Parking braking rod is designed to keep theundercarriage system in braking condition when starting the engine andguarantee the machine not to slip on slope when starting the engine.

Finaldrive

Finaldrive is two-stage planetary reduction gear mechanism. It is mounted at outsideof steering and braking clutch. Combined sprocket segment is very convenientfor assembling, disassembling and service.

Hydraulicsystem of the machine

Itis composed of oil pump, transmission control valve, steering and braking controlvalve, sequence valve, relief valve at torque convertor outlet, filter andlines.

Mainpump-------------------------------------------------------------------------------------------------------------Gearpump

Oilflow----------------------------------------------------------------------------------------------------------------160　L/min

Workingpressure ------------------------------------------------------------------------------------------------------3.1　MPa

Rops with air conditioner cab

Thecab is hexagonal thin wall box-type structure. Glass is mounted at sixsides with wide viewing area. Pulling and pushing glass is installed at backside. Air conditioner is top-mounted with functions of cooling and heating. Thestructure of Rop is rigid. It can protect the driver efficiently when thebulldozer is in special condition.

Implementhydraulic system

Implementhydraulic system can control lifting, lowing and tilting of the blade. It alsocan control lifting, lowing of the ripper. It mainly consists of oil pump,cylinder, inlet valve group diverter valve group, oil tank line and controllingparts.

Mainpump ------------------------------------------------------------------------------------------High pressure gear pump

Oilflow --------------------------------------------------------------------------------------------------------------194　L/min

Systemworking pressure-------------------------------------------------------------------------------------------18.6　MPa

Leftand right undercarriage system

Thetrack is triangle shape. The sprocket is elevated. There are two idlers infront and at rear of the frame and seven track roller. Recoil spring andcylinder adjuster is mounted at the undercarriage. The rear end ofundercarriage frame is supported on the pivot. The front end is articulatedwith the equalizer bar. Choosing different undercarriage system according todifferent implement. The customer is required can guarantee center gravity ofthe machine to be at best efficient position. Choosing different width of trackshoe can ensure the bulldozer developing its optimum traction efficiency.

Maintenancefilling capacity

Fueltank --------------------------------------------------------------------------------------------------------------------- 450L

Watertank of cooling system ---------------------------------------------------------------------------------------------118L

Camshaftbox of the engine-------------------------------------------------------------------------------------------------20L

Bevelgear case--------------------------------------------------------------------------------------------------------------150L

Implementoil tank---------------------------------------------------------------------------------------------------------100L

Pivotlubricating tank-------------------------------------------------------------------------------------------------------15L

Finaldrive ------------------------------------------------------------------------------------------------------------------15L

Optional implement and components    (*ordinary)

1)cab

A、Rops with air conditioner cab 　  ＊

B、Rops cab

C、Rops canopy

2)Frontmounted implement

A、straight tilting blade　　　　　　＊

B、Angle blade

C、U-type blade

3)Rearmounted implement

A、single shank ripper　      　　 ＊

B、three shanks ripper

C、back drawing mechanism

4)Trackshoe of undercarriage

Optionaltrack shoe width

A、510mm          B、560mm 　　　　＊

C、660mm          D、914mm

5)winchdozer used in forest, desert dozer, LGP dozer ,HW dozer can be chosen accordingto special requirements of customer.