SWDM320HB OPERATOR’S MANUAL
correctly before extending and retracting crawler before work and shipping .
Crawler travel system(see fig 2-2) is composed of guide wheel, tension device, crawler
assembly, carrier roller, track roller, drive wheel, travel reductor etc. Crawler regulating system
keeps its tension by using high pressure lubricant. Hydraulic system controls travel system to
complete moving forward/backward, left/right, turning etc.
Crawler tension unit (Fig 2-3) is composed of tension cylinder, tension spring, guide wheel, oil
cup. Track tension is regulated by hydraulic; tension spring must exist precompression which
can make crawler tension and ensure meshing between crawler pin and drive wheel.
Important：Lubricating grease leakage cannot be checked through safety valve.
1. Guide wheel 2. Tension spring 3.Tension cylinder 4. Grease zerk
Fig 2-4
2.3.3 Upper-Carriage
Sunward upper-carriage design is considering stability and multifunction application demand,
easy operation and maintenance. Hydraulic and electrical pipelines are arranged in different
layers, beautiful and clear integral layout.
2.3.3.1 Turntable
All parts in upper-carriage（including big roller main winch, Auxiliary winch, hydraulic oil tank,
power system, air condition etc.）are fit under turntable. According to rig work condition,
1. travel redactor motor 2. drive wheel 3. track roller
4. crawler assembly 5. carrier roller 6.guide wheel and tension
Fig 2-3
Figure2-3
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