BAOSHISHAN 4 Ton Bottle Jack 10-5/8" to 24" Lifting Range High Lift Double Ram Bottle Jack Hydraulic Welded Jack Truck Jack

First of all, I decided to purge any air out of the system introduced in shipping for any problems later. For instance, my release valve sets at 10’o clock closed position, I loosen it 3 turns ccw (back at 10’o clock). Then pumped it 20x to make sure there’s no air in the system, after that tighten the release valve and you should be good to go. Note that this jack does not recede back by itself without weight on it. I just turn mine 3x ccw and it was easy enough to push the pistons down by hand. Warning don’t back out the release valve too much or you’ll have hydraulic fluid all over your floor. 3 turns were enough for mine. The jack itself is 16 lbs, with the 3-section handle total is 17.4 lbs The overall max height is 24”, the first section that comes up without lifting any weight is the smaller diameter and that took 64 pumps to raise 7”. Then after that the larger diameter will raise it another 6.5” which takes additional 133 pumps. I don’t mind the number of pumps, just here for reference; I need the capability of lifting it very high, which this jack does! When lifting a car, the smaller diameter ram comes up first and when it hits restriction then the greater diameter takes over to do the initial lifting. After the bigger diameter ram reaches limit, the smaller ram takes over and lift the car to the 24” limit.

I chose this jack because of the max lift height and capacity. My truck's axles are about 22" above the the ground, so I need a tall jack unless I want to use excessive amounts of blocks (which isn't safe). Truck weight is around 12k pounds empty, 16.5k loaded. So a 12t jack gives a 100% safety margin empty and 50% loaded. This is the tallest 12t+ jack I was able to find. The jack arrived in good condition. Its big and beefy and looks well made. I did a "test lift" of my truck (empty) and it worked just fine. It lifts slowly, but that's to be expected given the high weight capacity. BTW, I used a Safe Jack axle cradle to safely lift the truck. Using a bottle jack with a small round screw pad on top directly on an axle is not a good idea. The Safe Jack 20t "universal lift pad" fits this jack. I still need to get a bigger and thicker base plate to place under the jack for stability and to prevent sinking in soft dirt, and to get a little more lift.

Heavy duty excellent qualty.

The jacks (I bought two) work very well in tight vertical spaces as long as you can place the jack where you can get a good range of motion for the pump lever. If you put the jack too far into a tight space, the pump stroke is limited and the jacking is very slow. Once we learned to keep the pumping apparatus out where it could be worked through its range, our work was done much faster. I am going to try to devise a pump lever with an offset in the handle so that more of the range can be used when the jack is recessed into a tight spapce.

the stats on the 5 ton jack are not accurate. Its just over an inch taller that is says Its nearly 10 inches tall at the minimum. Its heavy and solid and the 3 part handle is nice. Lifts like a breeze and quickly. Its $125 so more than double the cost of other jacks, but you do get what you pay for. $125 quality, vs some $50 junk jack. I would recommend it if you need a good solid jack reliable jack but remember its actual height is taller than stated. 4 Starts because the measurements are not accurate.