Scissors Lift/Ramp hydraulic advice needed

[mymini86]

I have a few scissors lifts/ramps - two different makes, which I will need to relocate, there are three lifts that are not currently working at the moment, and that is where the problem begin.

I will need access to underneath the deck to undo the anchor bolt to free them from the floor, which I will need to lift the deck up, but with the lift not working this presents a small challenge.

1. They have double acting cylinders fitted and I am thinking to undo the hydraulic hoses to the cylinders and lift the deck with an engine crane, will this work?
2. One of the ramps is recessed into the ground, so lifting with an engine crane might difficult, can I use a portapower - with the correct adaptor fittings, to jack it up? I will support it with some wooden blocks while undoing the anchor bolts. They weight around 800kg per set.
3. One of the ramps is fitted with a manual backup jack, and I have tested it and it works, but could someone identify the release from the valve block?
4. They have three connections on the schematic and I am wondering why they have individual supplies for left and right cylinder for extension but only one pipe for retraction? I have attached the schematic below.

Many thanks for your help in advance.

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[frank horton]

as nobody else has replied.......
because of the MESS, I'd be inclinded to let the oil out wherever u can......there prob won't be much left !!!!!.....big bag of saw dust wont do any harm, just make a bund with it for what u cant save.....jack it up and remove the fixings.....then get the damm thing cleaned.......
refill and find the leaks........u just cant have that mess around......not ur fault.......
or if ur worried, get a jack under it somewhere give it a little lift and back off a hyd fitting....u'll know u got the right one cos it will get easyer to lift......
clean and top up.......these machines will self bleed.....

after the fixings are off get some blocks and wedges to start the lift....remeber u'll need to do the proper lift from the BASE not the top.......have to say that but u'll know.......
good luck......

 

[Matrixx]

Pic 3 looks like a manual jack and a manual solenoid? ( sorry am electrical not hydraulic)

 

[mymini86]

Pic 3 looks like a manual jack and a manual solenoid? ( sorry am electrical not hydraulic)

Yes, but I am trying to find the release or how to lower it down.

 

[mattg]

Is the release the knurled manual override knob on top of the solenoid valve?

 

[Matrixx]

^^^^ what he said?

 

[mymini86]

Is the release the knurled manual override knob on top of the solenoid valve?

Tried that but it just came off like a cap, and does not seem to do with anything.

 

[Dutch Welder]

Could it be the hex bolt?

 

[jsf55]

It's a crappy picture but have u tried pushing down on the lever too see if releases fluid ?