1. Top lift operations, to choose the appropriate Jack: lifting weight does not overload, the general choice of jack up lifting capacity greater than 1.5 times the weight of gravity; Jack minimum height is appropriate, in order to facilitate removal. Jack uses the minimum height should be net space and weight at the bottom of the applied force to adapt to the landing pad Zhenmu stack support weights, Jack L is greater than height sleepers thickness and Zhenmu stack deformation and.
2 if the use of a few jack jack up the same equipment, the same model should be used in the jack, and each jack shall not be less than the nominal weight of 1.2 times the weight of the equipment.
3 Jack should be wiped clean before use, and should check whether the components are flexible, there is no damage. Hydraulic jack, the oil valve, piston, the cup is intact, whether the oil is clean.
4. Use that Jack should be placed flat, in the jack base and jacking pads tough pillow, wood or steel plate to expand bearing area, so as not to fall or slide and the event of an accident. Note that you can not use the oil stained wood or steel plate as a liner to prevent the load from slipping. The lifting of the object must be a solid part to prevent damage to the equipment. The position of the jack should be positive, not skewed, prevent ground sink or load shift and make Jack deflection or overturned.
5 operation, should be a little bit of the top of a few, carefully check without exception, and then continue to lift heavy weights. If it is found that the compression of the plate is not smooth, not solid or Jack skew must be the jack Panasonic, handle in time before it can continue to the top of the rise.
6. In the process of hoisting, continual increasing weight in a timely manner below the bedding insurance pillow wood, to prevent Jack tilted or back caused by piston dropped suddenly and cause accidents. Lowering the weight to gradually draw out sleeper, sleeper and weight distance shall be not more than the thickness of a piece of sleepers, to prevent accidents.
7. Hydraulic jacks to release, an oil return valve is ajar, the slow decentralization, not suddenly dropped, so as not to damage the skin bowl caused damage to the jack.
. rack Jack release, not suddenly decentralization, such as sudden decentralization will make internal device by the impact force, resulting in a crank beating and wounding.
9 shall strictly comply with the technical specifications of the jack: the length of the handle, the number of operations, the lifting height. Shall not be arbitrarily extended operating handle, is not allowed to increase the number of operations to apply a strong hard pressure. Lifting height can not exceed the prescribed limits, screw jack sleeve and hydraulic jack piston are marked with the red line, when the red line is exposed, should immediately stop the operation. If no mark, the lifting height of the nut sleeve or the total height of the piston shall not exceed 3/4.
If the weight lifting height to exceed the rated highly for Jack, must first in the top heavy pad good sleepers, lower jack, pad the bottom, repetitive lifting until need lifting height.
10 jack can not be used as a permanent support. For long time support, the supporting part should be added under the weight of the heavy object to ensure that the jack is not damaged.
11 if the top lifting heavy objects with one end only when a jack, the jack should be placed on the symmetrical axis of the weight, and the jack base long direction and the direction of the heavy load is easy to fall in the same direction. If the heavy end of the use of the two jacks, the direction of the base should be slightly splayed placed symmetrically in heavy axis of symmetry on both sides.
12 when lifting a heavy object with two or more jack, it must unify the command, coordinate and coordinate, at the same time, the speed is basically the same.
13 Jack should be stored in a dry and clean place, not on the outside of the sun and rain.