Atlas SLP 7K not level

[ukrkoz]

I am hoping, there might be some SLP 7K users here.

I had lift installed and as of today, have only one issue left.

Platforms go up level, but going down, one tracks much faster than the other. As in - a lot. There is no safe way to use it.

I probably know instructions by heart by now. Make things better, they are written in - good - "Chinese" English. Of course, it's internet purchase, so they "we do not provide on site support where you at" as their stores stop in Arizona.

Seller is apparently tired of me, as they keep copy pasting manual, which I have 2 full blown copies of anyway.

Basically, I am trial and error-ing this.


For starters, one platform was going up much slower, but I fixed that. Now, same platform lowers itself much faster.

I have done bleeding twice today. Full raise, open leveling *****, press Down button. 5 times. By the book. I ran pump with ***** opened, 30 seconds, by the book. MOF, lift should not be going up during this, yet it does.

I even had my Camry on it, and used it as weight to press "slower" platform down. It sorta works, but only up to maybe 10 inches wheels off the ground, then it starts tilting car when lowered.

I am in serious need of practical advice on how to tame this animal. Otherwise, it's very strong and powerful lift, and I really like how it folds almost into nothing on the floor and I park my Camry right atop.

Yes, all lines connected properly. Checked some 7 times, even have pics

the going fast down platform is one on the picture left

 

[darkk]

Is there a variable proportioning valve between the two lift sides?

 

[ukrkoz]

should be but is not. per design, platforms are leveled by releasing "leveling *****". But their leveling procedure is mentioned only for UP direction, nothing is said about DOWN. Took me about an hour of fooling with it to make platforms go up more or less level.
Beats me on the Down issue.

System has electrically controlled safety valves, one per each platform. Then main pressure release valve, also with electrical solenoid. All 3 can be released manually.

 

[Sureshot]

Something that I saw once was a fitting that threaded in so far into an elbow that it restricted flow essentially creating a choke point. Do you have a hydraulic flow chart or diagram?

 

[ukrkoz]

 

[ukrkoz]

 

[Sureshot]

What did you do to "fix" the slow going up platform? That one is now faster going up and down?

 

[ukrkoz]

Their instruction say:

7.7.5 PLATFORM LEVELING If the platforms weren’t leveled (one of the two platform is lower than the another one), follow these instructions:
• Turn on the leveling cutoff **** of the lower platform • Feather-push the lifting button until this platform is in the same height as another’s. • Turn off the leveling cutoff **** after leveling.

What it does not say - when to do this. Here's 2 things I realize:

1. I have safeties installed, and they do not allow platforms to raise past almost full cylinder extension
2. the way I leveled platform was to let them go up (P1 goes faster)>P1 reaches uppermost position>release UP button>open leveling **** on the right hand side, allegedly - for P2(lower) and start doing pumps with UP button. This leveled platforms, but now fixed P2 was going down much faster.

I almost got it. I spent all this time since my last post, feeding oil into cylinders twice, bleeding cylinders several more times. As a result, I, actually, got them going up and down pretty good.

Until I gor my Camry on them. Starts level, then P2 slows down some, then picks up, both go up level, and at about 25 inches wheels off the ground, P1 starts going faster again, just like it was before.

I gave up for now. It took me entire day of frustration today. All lines connected and not leaking; all valves closed; it all appears to be working properly electrically. Its' SCARY, how car starts tilting left-right, as platforms start chasing each other. Useful height is about good for oil change sitting on the floor.

 

[ukrkoz]

Reason I mention safeties is that they prevent cylinders from coming out all the way and, also, are installed, per design, only on one platform. As a result, P2 with safeties on it stops BEFORE P1 reaches full cylinder extension. I think, I need to remove safeties and run it all from full extension on BOTH platforms again.

 

[ukrkoz]

If you read their bleeding procedure, it tells you to extand pistons all the way up, and I can't with safeties installed:

• Continue raise the lift by pressing the lifting button until the cylinder bottoms out and stops
• Lower the lift by pressing the lowering button and in the meantime turn on the leveling cutoff ***** (fig.14 - A) and (fig.14 - B);
• Keep press the lowering button until the lift reaches the minimum height. If the safety height limit switch is already installed, the lift will stop when the lift reaches the safety height. In this case, lower the lift completely by pushing the final lowering button. During this procedure the beeper is activated and remains active during the lift lowering
• Raise the lift to the maximum height and in the meantime turn off the leveling cutoff *****
• Lower the lift completely and in the meantime turn on the leveling cutoff *****. • Follow this procedure and repeat raise and lower the lift at least 5 times to bleed all the air trapped inside the cylinders.

 

[Sureshot]

Try extending them all the way up and loosen a fitting near the top and see if it has air in it. The air will go to the top.

 

[sublimate]

Here's the hydraulic flow diagram for the lift.
There are 3 things that could be wrong (the first is most likely):
1. You still have air in the system
2. One of the leveling valves or cylinders is leaking
3. It's plumbed wrong

 

[ukrkoz]

OK. I'll need to remove safeties first. Tired of this.

Thank you so much for your help.

 

[ukrkoz]

Here's the hydraulic flow diagram for the lift.
There are 3 things that could be wrong (the first is most likely):
1. You still have air in the system
2. One of the leveling valves is leaking
3. It's plumbed wrong

ha-ha, I knew I took those pics for good reason.
No, it's plumbed OK. Nothing leaks, as in - dray everywhere.

and you can clearly see how P2 was lagging behind:

 

[ukrkoz]

Try extending them all the way up and loosen a fitting near the top and see if it has air in it. The air will go to the top.

btw, only one piston per platform has upper fitting. Can't release it on the other one. It has master and slave cylinder, and only one has upper line connection.

 

[ukrkoz]

Basically, my hunch is, I am bleeding it wrong, or something else needs to be done to rid of air in it. They should have placed bleeding screws at cylinders' tops....

 

[Alw]

ukrkoz,

Did you get the problem resolved yet?
Also, where did you find the air line connector for the 8-5MM tubing?

 

[ukrkoz]

Yeah. They hired someone to come over. 20 years as installer. They also had their showroom guy on the phone with him for about an hour.
Per installer, it's definitely air trapped in cylinder. The way it was fixed, he kept running that lift up and down for about 2 hrs, messing with valve handles, until it all clicked in place right.
I don't think even he knew what exactly he did. But we had my Camry up about good 5 feet from the floor.
As of air fitting, it's quite simple. Barb with threads on the opposite end to fit quick disconnect air hose coupling. I think, 1/4 inch.
Btw, if you ever need to disconnect air lines from air locks on the platforms... Those little barrel shaped press in fittings - push blue plastic ring back and it releases air line. Similar to quick disconnect air line coupling.

 

[ukrkoz]

 

[ukrkoz]

Not to revive an old thread..
I usually take a week off, to start yard work and such. Same time, I lagged behind and finally got to maintenance on several of our cars.
Did 4 oil changes, tire rotations, minor repairs. Good times.

As a result, I had that lift running almost daily. Scary at first, but I am getting used to it. It's actually very cool, I don't even have to change anymore to do oil changes.
I am 6'5'', so you can tell how convenient it is. Also, SUV is in lift locked position, it can go much more higher.