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Precautions for the use of hydraulic wrenches

source:Industry News release time:2021-03-24 Article author:Rosit Popular:Air band saw

　　For the installation and disassembly of large-size bolts, Rehn hydraulic wrenches are indispensable tools. When using hydraulic wrenches, you must follow rigorous operating procedures. Incorrect operations will not only reduce the expected effect or even damage the hydraulic pressure. Wrenches and those that caused engineering accidents, today Rein will introduce you some precautions for the use of hydraulic wrenches.

　　Precautions for the use of rain hydraulic wrench

　　1. At the very beginning, what people have to do first is to determine this loosening action, or what people still need to use is to lock the nut and then press down or unscrew the locking screw.

　　2. Taking out some drive shafts and reversing them.

　　3. Later, people can install some related drive square axis positioners on it, pull down the reaction arm locking device, install the reaction arm according to the appropriate orientation, and determine the direction of the square axis during loosening and locking. .

　　Check before use of Wren hydraulic wrench:

　　1) Electric hydraulic pumps should not be used in flammable and explosive environments. Pneumatic hydraulic pumps should be used.

　　2) Check that the working voltage of the electric pump meets 220V.

　　3) Check the triple device of hydraulic wrench pump pressure adjustment, filtration and oil injection, perform drainage, add 46# anti-wear hydraulic oil, and adjust the intake pressure.

　　4) Check that the oil level of the oil mark of the hydraulic oil pump is above the 0 line, and the hydraulic oil is clear and transparent. Special hydraulic oil should be added, and other oils are strictly prohibited.

　　5) Check whether the ultra-high pressure hose is bent or damaged; when connecting, straighten out the hose without tangling, wipe the plug and socket clean and free of dirt, insert the quick-release connector to the end to ensure the connection is reliable, and lock the threaded sleeve by hand , Otherwise the one-way valve in the quick-fitting joint will not open and cannot supply oil normally.

　　Operating procedure:

　　1) The function of the wire-controlled switch button: press the (RUN) button, the oil cylinder advances; release the button, the oil cylinder automatically resets. Press the (STOP) button to stop the oil pump.

　　2) Before starting the hydraulic pump, first open (unscrew) the pressure regulating valve, then turn on the power (ON) to check whether the hydraulic pump is running normally; then click the remote control button several times and run for a few minutes to adjust the pressure to the required level Preset pressure value. The rated pressure is 70Mpa.

　　3) When adjusting the pressure, you should hold down the remote control button. When you hear the wrench "snap", the quick release lever jumps down, the wrench stops rotating when the wrench is in place, the pressure gauge rises rapidly from 0, and the other hand slowly adjusts the pressure regulating valve upwards , And can be locked with a lock nut.

　　4) Dry running, put the hydraulic wrench on the ground, press the (RUN) button, the wrench starts to rotate, when you hear a "pop" of the wrench, the wrench is in place and stop rotating; at this time, let go of the button and the wrench will automatically reset. When you hear a "pop" of the wrench, the reset is complete. Namely: RUN—advance—slap—release—reset—slap. Repeat a few working cycles and observe that the wrench rotates without abnormality, and you can put the wrench on the nut to work.

　　5) Loosen the nut: Adjust the pressure of the hydraulic pump to the highest (70Mpa), confirm that the wrench turns to the loosening direction, find the reaction fulcrum, be stable, and repeat the forward and backward working cycle of the cylinder. If the nut cannot be removed, take measures to remove rust. If the nut cannot be removed, use a larger hydraulic wrench.

　　6) Locking the nut: check the torque correspondence table to determine the pressure setting of the hydraulic pump, confirm that the wrench turns to the locking direction, find the reaction fulcrum, be stable, and repeat the forward and backward working cycle of the cylinder until the nut does not move.

　　7) When the hydraulic wrench operation stops, the power should be turned off in time.

　　8) Cut off the power after the work is completed, press the pressure relief valve to remove the residual pressure of the system, fully open the pressure regulating valve, and then remove the oil pipe.