Hydraulic Oil Change for DP 3.5t Lift: Step-by-Step Guide & Recommendations

Question

Hello, how is the hydraulic oil changed in the lift?

robokop · Answer

It does not exchange.

tomaszgt1990 · Answer

Yes, I know, but I lent it to my father, and he confused (!) The bolts and drained the oil. I don't really know now how to flood it again so that it doesn't get airborne; /.

robokop · Answer

Normally, you unscrew the filler screw, the one on the top of the body, pour oil over it and that's it.

tomaszgt1990 · Answer

For me, the fill plug is at the bottom side. I carried out the exchange in such a way that I lowered the piston, tightened the screw from lowering the piston, poured oil and unfortunately, when pumping, the piston did not rise at all; /.

robokop · Answer

Or maybe you would be kind enough to show what jack it is at all? Because you probably lost the ball.

robokop · Answer

I did not take it apart, so I will not say anything closer - but this screw with a red dot is probably not an oil filler.

kwok · Answer

You put the jack on its side, unscrew the screw (plug), pull out the spring and the mushroom, and then pour the oil with one hand and pull the piston out to the end with the other hand. You fold and push the plunger, but the jack has to be upside down, ie foot.

tomaszgt1990 · Answer

i.e. I have to flood the system upside down, after flooding, hide the plunger (the jack is inverted all the time), screw the cap, and it's ready?

kwok · Answer

screw the cap back on and retract the plunger.

hildek · Answer

I will join the topic.
Does someone have a diagram or could he write where the spring goes and where is the smallest ball under the taps? It's the size of a spring because mine is broken. Typical hydraulic zaba jack up to 3.5 tons.

jarekstryszawa · Answer

I also struggled with this equipment, but with poor results. For pouring, unscrew the top ring:

blazej145 · Answer

Hello, I would like to refill the oil in the lift because when lowering it too much, I unscrewed the screw and the fluid leaked out. I would like to know what kind of oil to use, how much should I pour into the lift and how to properly replace it for the lift to work properly. Regards

Staszek49 · Answer

To replace (replenish) the oil, I disassembled the jack, in the manner given by Jarek. I used a larger vice and a so-called wrench. teeth. I poured the oil into the outer "container", because the middle one is for the piston rod. As for the amount of oil (hydraulic) needed, not knowing the norm, I poured a little more than the capacity of the inner "pipe" in which the piston works. Anyway, any surplus will spill out when folding the lift.
For this operation, it is a good idea to have a helper press the "outer tube" against the bottom of the jack so that the oil that is being poured does not leak out through the bottom.

rafcio363 · Answer

I have such a jack, I unscrewed the left screw too much and it fired with the oil. I poured the oil into the left one full, the jack won't even budge. What is the right screw for (there is one more screw and a spring in the middle). Now I think I saw a ball from the bearing nearby, is it possible that it was supposed to be in that left screw that shot me out?

mirek_mgj · Answer

Hello
Gentlemen, it's a simple design.
The left screw (the one with the crossbar) is for locking/lowering the lifter and there is a shot (could be with a spring) and at least in theory it should lock so you don't accidentally unscrew it because it will shoot out under load.
The second bolt with the spring and shot/plug (or something like that) is the place to fill/bleed the actuator.
The best way is to unscrew the screw (the one with the screwdriver), turn it upside down and push in a funnel/needle tube or something that fits into the hole and fill it with oil (or the other end of the tube should be sunk in a bottle of oil - preferably thick, not engine oil - I poured hv46 hydraulic for heavily loaded ones and pull the actuator all the way out - so that it sucks in the oil. Then put the contraption together and lower and "overdrive" the actuator a few times until it stops. If you press the actuator (stand on it) - it goes down to the bottom, but then rises up by itself (it's airtight) - pump it up as far as it will go, then turn it over (upside down), stand on it, unscrew the screw to fold it up and release the air release screw (don't unscrew it completely or it will shoot out) to drain the air until oil starts to leak out. Then turn it over and check; if spontaneous ejection repeats, bleed again. If there is too little oil, it will not slide out completely; if there is too much, it will not slide out completely and will be hard as a stone. First bleed it a few times and only then, if necessary, can you "drain it a little from the cross".

wlodzimierz · Answer

The problem is that these lifts do not have a filler plug with a tiny hole at the top so that when lifting air, the air flows in when the oil in the tank is depleted, so there must be a balance between the amount of oil and the amount of air otherwise it will not completely lift or it will not lower completely, it will only pop out, it is very difficult to fill if you do not know exactly how much oil you want to fill.

Pawwels · Answer

Vladimir's post proved very valuable. In my case, all I had to do was squeeze the rubber stopper at the back, the jack vented beautifully and now it runs like new. Previously, it wouldn't lift up, whereas after removing it by force it retracted, making bubbling sounds.

/matthew/ · Answer

I will refresh the topic. I bought a pillar lift, it lifts up but doesn't lower anymore.... How do I fix this? Fortunately I extended it dry and not under the car

Hydraulic Oil Change for DP 3.5t Lift: Step-by-Step Guide & Recommendations

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