Maintenance of prestressed tensioning jack?

Maintenance

1. In order to ensure the accuracy of the tensioning force of the bridge prestressed jack, the tensioning equipment system (jack, oil meter) should be calibrated regularly with "oil pressure output force", and made into a chart or

Draw a curve as the basis for tensioning. When the following conditions occur, the hydraulic system shall be recalibrated:

·The jack has been disassembled and repaired

·Re enable the jack after a long time

·The pressure gauge is damaged or replaced

·Exceeding the calibration period specified in relevant national specifications

2. The jack shall use 32 # or 46 # hydraulic oil in summer and 32 # hydraulic oil in winter. The oil should be kept strictly clean, filtered carefully and replaced regularly. Hydraulic oilDo not use inferior hydraulic oil.

3. When connecting the oil pipe and jack nozzle, the interface shall be cleaned and wiped. Pay attention to dust prevention, strictly prevent sand and dust from entering the jack, and minimize disassemblyTimes.

4. When the new oil pipe is used for the first time, it should not be directly connected to the jack nozzle. It should be cleaned in advance and flushed with the oil output from the oil pump before use. After removing the oil pipe, jack

The nozzle of the oil pump shall be equipped with a dust cap to prevent sludge from mixing.

5. The internal cavity of the piston and bushing of YCW series jack shall be checked frequently to see if there is any foreign matter falling in, and the internal cavity must be kept clean. Return the piston to the end after the work is completed.

6. Before use, check whether the front and rear locating nuts of the jack are loose and whether the screw thread is fully screwed in place, otherwise, stop using the jack until it is repaired,

In case of oil leakage, piston surface scratch and other phenomena during use, stop using, and immediately repair before use

7. Users can assemble and disassemble this type of jack by themselves. It is recommended to use our special assembly tool - flared sleeve and assembly kit. The flared sleeve is used to install the rectangular ring [grid ring] on the piston,

The assembly kit is used to install the piston into the oil cylinder, and the use of special assembly tools will make your assembly easy.