Car scissor lift hydraulic

[diegokarol]

I have car scissor lift hydraulic which has two double acting cylinders. The problem is it hasn’t gone extra safety lock mechanism. As it is double acting has it got some safety hydraulic parachute valve built in as a backup? Anyone familiar with this type of car ramp?

[ingenieur]

Probably like this one, if you look in the feature list: https://automotechservices.co.uk/products/as-7532b...

Worth seeing if there's any way to verify by maybe getting a copy of the manual for the one you've got.

[LowTread]

Had an AS7532B in my old garage.

Yes they have parachute valves inside. The double mechanism is there for redundancy AFAIK

I used to leave it up with a car on it for days at a time. It never budged.

But TBH i used to shove two massive sleeper-sized bits of wood in the mechanism to stop it coming down if i was ever crawling underneath, because i didn't trust it without a physical locking mechanism.

Worked fine for the 8 yrs i had it installed.

[ingenieur]

LowTread said:

Had an AS7532B in my old garage.

Yes they have parachute valves inside. The double mechanism is there for redundancy AFAIK

I used to leave it up with a car on it for days at a time. It never budged.

But TBH i used to shove two massive sleeper-sized bits of wood in the mechanism to stop it coming down if i was ever crawling underneath, because i didn't trust it without a physical locking mechanism.

Worked fine for the 8 yrs i had it installed.

I heard about a bad accident somebody had (fatal) where the pins used to hold the arms on the 2-post lift were not in place and the car swung on the arms and came down! You can imagine how in a busy workshop with people not trained on the gear that those pins might be left out!

[Tbirdpete]

As someone involved in health and safety of hydraulic systems, do NOT work under any form of hydraulic system unless there is some form of mechanical prevention system (yes, even blocks of wood) that prevents or limits any movement in the case of hydraulic failure. It does happen. Do not rely on the integrity of a hydraulic system where gravity/stored energy can have an effect.

[diegokarol]

I don’t know what model of lift is this I can’t get any info about it unfortunately. If I would use it I will support it with axle stands or blocks of wood. I was hoping that someone would have more knowledge about this type of lift. More pictures just for evidence.