Crawler Bulldozer (SD7)

HBXG (SHEHWA) SD7 crawler bulldozer:
Engine
Model Cummins NTA855-C280
Type Water cooled, single line, vertical, four strokes, turbocharged, 6-cylinders, diameter 140mm
Flywheel power, kW
177

Rated speed, r/min
2100

Number of cylinders - bore x stroke, mm 6-ø 140 x 140
Starting method
24V electric starting
Battery 24V
Transmission system

Torque converter Power separating hydraulic-mechanic type
Transmission It integrates center drive, transmission and speed changing controlvalve into one component. It can be assembled or disassembled as aassembly or as a part. It is very convenient to service.

Transmission is multi-stage planetary gear drive to realize modularassembling and disassembling. The shift can be changed among 1st gear, 2ND gear, 3rd gear forward or reverse rapidly, through multi-functionalcontrol valve.

Steering clutch
Wet, multiple-disc, hydraulically pressed, non-constantly engaged
Steering brake Pressed by spring, separated hydraulically, constant meshed type
Final drive
Final drive is two-stage planetaryreduction gear mechanism, splash lubricated. It is mounted at outsideof steering and braking clutch. Combined sprocket segment is veryconvenient for assembling, disassembling and service.

Travel speed, km/h
Forward:
1st 3.9
2ND 6.5
3rd 10.9

Reverse:
1st 4.8
2ND 8.2
3rd 13.2

Undercarriage
Sprocket Segmented
Track tension Hydraulic-adjusted
Number of track shoes, each side 7
Number of carrier rollers, each side 1