Buy small crane Precautions

Buy small crane, a vehicle depends on the appearance of a small crane, small crane structure, small crane hydraulic system, there is no certification, especially small crane front and rear axles and gearbox, is not innovative! Verify small crane old gearbox, front and rear axles trick to have: the ability to investigate the appearance of a small crane front and rear axles have dirty oil, can scratch the metal weapon look dead there is no slop! To see a small screw axle rear axle crane is not regular, big and small the same, especially since marginal axoneme empty thread is not clear, there is no split at the scene.
 Electric pallet jack balance shaft bearing pneumatic suspension system can converge through the pipeline , different axle oil stretched spring cylinders link up play balance shaft bearing results.
    Progressive small crane travels ride hydrocarbon stretched spring can get excellent elasticity characteristic curve and lower natural frequency, so small crane traveling ride and comfort is greatly superior to steel stretched spring suspension, and reduced vehicle the impact on the ground . Small crane pneumatic suspension variable stiffness elastic characteristic curve can avoid attacks suspension breakdown on cross-country road is very important.
    Add a small crane roll stiffness when the vehicle is turning, because the effect of centrifugal force , moving the center of gravity , so small crane significantly skewed. Small crane pneumatic suspension system will be left and right oil stretched spring series , can greatly enhance vehicle roll stiffness . Pneumatic suspension cylinders best selection of large and small lumen area ratio can be obtained aspiring roll stiffness . Similarly, the front and rear cylinder gas stretched spring series , can improve the whole vertical angular stiffness to overcome the brake to allow representation .