Casting Iron Bridge Construction Machine Dia 15.7mm Hydraulic Jack Post Tensioning

Installation of Post-Tension Jack and Anchorage

1. The steel strand shall be threaded into the reserved gallery of the structure, and the exposed length of the steel strand at the tensioning end is required to be 200-250mm longer than the working length of the jack. The steel strand must be cut with a thin disc grinder without loose ends or "rough ends" to avoid difficult perforation.

2. Cover the end of the steel wire bundle of the working anchor plate, push it to the anchor base plate, and align it with the spigot.

3. Installation of working anchor clips: before installing clips, use steel rings to clamp each pair of clips together, then push them into the taper hole of the anchor plate along the steel strand, and then push them until they do not move.

4. Installation of limit plate: the limit plate is designed according to the working anchor plate and matched with the hole of the anchor plate.

5. Installation of jack: first bind the end of the steel strand bundle with a wire pin, then lift the jack and put it on the steel strand, and put the support opening of the front cover of the jack on the outside of the limit plate. At this time, the jack can be coaxially aligned.

6. Install the tool anchor on the support lip at the end of the piston.

Operating Methods of Post-Tension Hydraulic Lifting Jack

1. If the oil volume of the pump body is insufficient, it is necessary to add working oil (46# or 32# hydraulic oil) to the pump before it can work.
2. Estimate the lifting weight and avoid overloading.
3. Determine the center of gravity of the lifting object, select the point of focus of the jack, and at the same time must consider whether the ground is soft and hard with a tough steel plate, so as to avoid the danger of tipping during lifting.
4. After the jack lifts the heavy object, it should be firmly supported by tough support in time. It is forbidden to use the jack as a support to avoid the unbalanced load and the danger of dumping.
5. When using, first connect the quick connector of the manual pump to the top, then select the position, and tighten the oil drain screw on the oil pump to work. Loosen the oil drain screw and unload the oil cylinder.
6. Please refer to the electric operation manual for the electric pump.

Notices of Post-Tension Hydraulic Lifting Jack

1. If there is a runaway phenomenon during use, you can first loosen the oil drain screw on the pump body, lift the pump body upright and head down a few times, and then tighten the oil drain screw, you can continue to use.
2. When there is a load, do not remove the quick connector to avoid accidents and damage to the parts.
3. The machine uses oil as the medium, and the maintenance of the oil and the machine must be done well to avoid blockage or oil leakage, which will affect the use effect.
4. For a new or long-established hydraulic jack, because there is a lot of air in the oil cylinder when it starts to use, the piston rod may have a small sudden jump. The hydraulic jack can be reciprocated 2-3 times without load to eliminate air in the cavity. The jack that has been idle for a long time will be hardened due to the long-term non-working of the seal, which will affect the service life of the hydraulic jack. Therefore, when the hydraulic jack is not in use, the hydraulic jack should be reciprocated 2-3 times a month with no load.