One is to check whether the oil drain valve is completely closed; the other is to tighten the oil drain handle and loosen it by half a turn, and press the handle to discharge the air; the third is to enter the dust
There is too little hydraulic oil in the hydraulic system or cylinder to open the oil pump oil hole bolts, replace or replenish hydraulic oil, and tighten the oil hole bolts.

How to use the horizontal jack.
1. First of all, whether it is repairing a car or lifting other heavy objects, you must find the base point, and the place that is too fragile cannot be used as a support point.
Yes, it is easy to damage the object.
2. After determining the support point, the pressure rod must be inserted into the casing in front of the jack, so that the jack can be pressed, and then the jack
Only the other end of the roof will rise.
3. After installing the pressure rod into the casing and ensuring that the installation is stable, you can press the rod down continuously, so that the end of the jack passes through
The hydraulic pressure will slowly rise until the weight is pushed to a suitable height to stop applying pressure.
4. At this time, the heavy object will be in a suspended state, and the object can be repaired or inspected. Do not move the jack during the repair, and the repair is completed
After that, you need to relieve the pressure of the jack and then gradually return the heavy objects to the original position. How to relieve the pressure? Different brands of jacks have different pressure relief methods.
-Similar, but most of them will have a screw switch, turning counterclockwise can release the pressure of the jack and reset it.
5. After the pressure relief is reset, gently drag the jack out from under the heavy object, then pull out the pressure rod, and arrange all the accessories.
Return it to the original box for the next use. Do not lose any of the accessories.