Why QuickJack Has a Small Air Cylinder

Why QuickJack Has a Small Air Cylinder

Monday, November 12, 2018
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Here’s a common “problem” that actually isn’t a problem at all: Someone orders QuickJack after days, weeks or even months of studying it inside-out. But when QuickJack arrives, they discover something they didn’t know about, and a touch of panic sets in. What is this intimidating mechanical device, you ask? What is this fiendish plot to undo all good mechanics’ senses and strike fear into their hearts? Attached to the hydraulic cylinder, there’s an air cylinder that needs to be charged to 50 psi.


Sadly, QuickJack’s simple, innocent little “air bottle” causes a great deal of stress for some people. They worry: Do I need an air compressor; what happens if there’s not enough air; what happens if there’s too much air?

If this sounds like you, take a deep breath, because we’re here to let you know everything is fine. The air cylinder plays an important role, but it’s easy to maintain and will have a minimal impact on your experience with QuickJack. Here’s why your portable car lift has an air cylinder, and what you need to know about it.

It Serves a Purpose but Won’t Make or Break You

As you probably know, QuickJack is operated by an electric over hydraulic power unit. The secondary air cylinder is charged to 50psi by a simple Schrader valve. No air compressor necessary. A simple bike pump or mini hand pump is all you need to charge the cylinder. If you forget this step during your one-time setup procedure, you might notice the frames lowering erratically for the last few inches. You might not even notice anything at all! You won’t damage your frames, void your warranty or risk injury if the air depletes.

Charge It, Forget It

QuickJack cylinder assembly
QuickJack cylinder assembly

The air cylinder is incorporated into QuickJack for one simple reason: New hydraulic rams tend to be a little sticky at first: They work better as they get worn in. For this reason, the air cylinder is particularly helpful for the first 10 to 20 times you use QuickJack

Once broken in, the air cylinder becomes an even less essential part of your QuickJack setup. You don’t even need to charge it very often. The truth is, the charge in your portable car lift’s air cylinder will probably deplete after a couple dozen uses. Most people don’t even notice this has happened. They go on using QuickJack as though nothing has happened.

Worry-Free Operation

We want you to follow the QuickJack manual to the letter, and that means charging the air cylinder to 50 psi and checking occasionally to ensure it has a full charge. However, some people have steered clear of QuickJack because they misinterpret the air cylinder to be something that “requires an air compressor.” Nothing could be further from the truth. The air bottle is easy to charge (just like filling a bike tire). If you never charge it up again, chances are you won’t even know it. But it’s such an easy fix, you shouldn’t even worry about it.

Bottom line: if you happen to forget about the air cylinder and it loses air, you will not be doing QuickJack any harm. Additional air cylinders are available for purchase on the QuickJack website at any time. Be sure to choose the right cylinder for your QuickJack car lift model: 3500/5000 series and 7000 series cylinder assemblies available.