D7 Crawler Bulldozer

D7 Crawler Bulldozer

Name:D7 Crawler Bulldozer
Type number: HD22
Weight: 23.5ton

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Product Details

Chinese Haitui HD22 D7 Hydraulic Cralwer Bulldozer 


Haitui brand HD22 bulldozer is a hydraulic crawler type dozer which is equivalent to CAT D7 bulldozer or KOMATSU D75 bulldozer.It can be equipped with a variety of working devices and cabs to meet the various working conditions. They are ideal and efficient equipment for earth and stone construction work and bulk scraping.

Main Specifications

OverallDimension5460×3725×3395 mm
Operating Weight23500 kg
ENGINEModelCummins NT855-C280S10
TypeWater-cooled, In-line, overhead valve direct injection, turbocharged diesel
Number of Cylinders6
Bore × StrokeΦ139.7×152.4 mm
Piston Displacement14.01 L
Rated Power175 KW (238HP) @1800 rpm
Max Torque1030 N·m @1300 rpm
Fuel Consumption205 g/kW·h
TRANSMISSIONTorque Converter3-element, 1 stage, 1 phase
TransmissionPlanetary gear type, power-shift, forced lubrication
Central Drive ShaftSpiral bevel gear, single-stage speed reduction, splash lubrication
Steering clutchWet, multi-disc, spring loaded, hydraulically separated, hydraulic control 
Steering brakeWet type,floating band structure,foot brake with hydraulic booster
Final drive2-stage speed reduction of spur gear, splash lubrication
TRAVEL SPEEDGear1st2nd3rd
Forward0~3.6 km/h0~6.5 km/h0~11.2 km/h
Reverse0~4.3 km/h0~7.7 km/h0~13.2 km/h
TypeSprayed beam, suspended structure of equalizer
No. of Carrier Rollers2 each side
No. of Track Rollers6 each side
No. of Track Shoes38 each side
Track Shoe typeSingle Grouser
Width of Track shoe560 mm
Pitch216 mm
Track Gauge2000 mm
Ground Pressure0.077 Mpa
Pump TypeGear Pump
Displacement262 L/Min
Bore of Working Cylinder120 mm × 2
Blade TypeStraight-tilt BladeAngle BladeSemi-U-blade
Blade Capacity6.4 m³4.7 m³7.5 m³
Blade Width3725mm4365 mm3725 mm
Blade Height1315 mm1055 mm1374 mm
Max Drop Below Ground538 mm535 mm540 mm
MaxTilt Adjustment>735 mm>500 mm>755 mm
THREE SHANK RIPPERMax digging depth 666 mm
Max lift above ground555 mm
Weight of 3-shank ripper2495 kg
SINGLE SHANK RIPPERMax digging depth 695 mm
Max lift above ground515 mm
Weight of 1-shank ripper2453 kg

Main Features

D7 bulldozer 4

1,A CUMMINS QSNT-C235 engine which can meet national III emission gives you more power and reliability you need. Improved fuel economy over the previous model with strong torque output and low fuel consumption gives you excellent overall fluid efficiency.

2,The highly reliable power shift transmission, stable torque converter and the two-stage straight-tooth structure final drive transmit power efficiently.

3,It can realize automatic fault diagnosis and full monitoring.The overall cast instrument panel integrates air conditioning, electrical appliances and instruments into one, which is more beautiful and luxury.

4,The main frame of the full box structure adopts steel plate welded full box type integral structure, which is welded with the rear axle box. It has high impact load bearing capacity and resistance to bending and twisting. High quality weld seam ensures the main frame has a full life cycle.

More details

D6 bulldozer details 1

D6 bulldozer details 2


D7 bulldozer applications 1

D7 bulldozer applications 2

Export Cases

D7 bulldozer shippment 1

D7 bulldozer shippment 2

220hp bulldozer at Kenya 01

Our Factory

Shandong Haitui Heavy Industry Machinery Co.,Ltd established since 2010,is a leading manufacturer of construction equipment,offers machinery including bulldozers,wheel excavators and loaders unparalleled in price,quality and performance.

Haitui machinery factory located in economic and development zone,Jining city,Shandong province.It covers around 40000㎡ and have more than 100 workers.The new plant composed by spare parts area,forging workshop,assembly workshop,testing area and office building.The annual production capacity can reach 2000 units machineries to meet the demand of domestic and internation market.

Haitui bulldozer factory 2

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