Crawler cranes safe use and maintenance

  1 used crawler cranes operating points
    1) the engine is started, it must be placed in neutral position all the joystick. The instrument should be checked after startup indicated value as the engine is running and listening to the case,overhead bridge crane confirmed normal only after the work began.
    2) operations, before commissioning inspection agencies working properly and reliable. Especially in rain and snow after work, try lifting cranes should be recognized only after work reliably.
    3) within the scope of crane operation must not affect the operation of obstructions. Work no one is below the boom stays or adoption. Prohibited by crane carrying persons.
    4) luffing crane indicator, torque limiter and limit switch and other safety devices, shall be adjusted and removed. Replaced with a non-limiting device manipulation. No limit device for enhancing the crane boom must not exceed the maximum elevation of 78 °.
    5) Crane lifting performance must be specified job, not overloaded and hanging objects of unknown quality. Prohibited stayed with lifting hook, oblique hanging.
    6) full load lifting, the crane must be placed on a firm, level ground, the first heavy lifting from the ground 20 ~ 50mm,sino hoist check to make sure the crane's stability, braking reliability in order to continue lifting. Action should be smooth, prohibits two actions simultaneously.
    7) In case of material objects must use the double lift crane, a heavy mass not exceeding two cranes from the weight of the sum of the allowed 75%. Banding should be noted that the average load distribution, so that each crane load does not exceed 80% of the aircraft allow loads. In the unified command, in close coordination with the two machines hook pulley should basically remain vertical.
    8) hydraulic and pneumatic driven cranes, should be required pressure, speed operation is prohibited by elevated pressure, accelerate speed and other means to meet the construction needs.
    9) the worm, worm drive luffing mechanism, the boom is not prohibited in the jaw clutch complete stop before pulling into neutral.
    10) cranes with load when walking, crane arm should be parallel with the track, the weight should be tied to the rope. Walking should not turn too fast, rough or uneven pavement where not turn.
    11) crane unloaded on the ramp traveling uphill elevation should be put a small boom for some, but it should be downhill elevation magnify the boom, in order to balance the crane's center of gravity. Coasting downhill is strictly prohibited.
    12) In case of strong winds, heavy snow, heavy rain or fog, they should stop the lifting operation, and the boom go downwind.
    2 crawler  bridge gantry crane  transfer transport
    1) long-range transport rail transport should be used, such as using a concave flat car shipment can simply remove the entire loading operation equipment. As with ordinary flat shipment, it shall open the hangar and the working device, packed two wagon, transporting goods by rail gauge rules apply.
    2) local transportation can be appropriate flatbed trailer load shipment, transport should be removed boom and counterweight, and the swing brake stopped, and then bolt off in prison, and the track ends with skids lashing them securely. To reduce the height of the crane, the crane can be upper Renzi Jia down.
    3) a short distance using self way to transfer, generally not more than 10km, each traveling about 1 hour walking mechanism should check all parts and lubrication to avoid excessive wear.