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Conversion of the O Series Pneumatic Actuator from Fail Closed to Fail Open
In this video we will be converting an O Series Fail Closed pneumatic actuator to Fail Open.
First remove the indicator cap from the top of the actuator.
Please note that the slot in the shaft is perpendicular tho the actuator housing . Remove spring end caps.
This is the actuator with the end caps fully removed.
To remove the internal pistons,place a wrench on the actuator stem and rotate counterclockwise until the pistons can be pulled out. It is very important to note the orientation of the pistons as they come out of the actuators, since you will rotate them 180°
Here is a side view showing how the piston was removed and how it engaged the internal yoke. The bar on the piston (A) engages with the notch in the yoke(B).

The shaft needs to be rotated so the piston engages on the opposite side. Use a wrench to rotate the shaft counterclockwise approximately 90 degrees.
After the pistons are rotated 180 degrees , push them into the actuator to engage with the yoke.
Rotate the shaft counterclockwise until the pistons are pulled fully into the actuator housing. Note the slot on the shaft should now be parallel to the actuator housing.
Re-attach the spring end caps but be sure to match the tabbed o-ring to mate with the air port on the actuator housing
Tighten end caps.
Attach indicator cap
The actuator should rotate clockwise when air is applied. It should spring closed counter clockwise when air is removed.

Assured Automation your source for automated valves and flow meter.

Assured Automation is a leading provider of automated valves and flow components for industrial process control applications. For over 20 years we have been providing state of the art automation to a diverse clientele ranging from small equipment manufacturers to Fortune 500 Manufacturing, Chemical and Pharmaceutical Companies.

Our product line consists of a complete offering of standardized automated valve assemblies with a variety of commonly used accessory items. In addition, we offer complete valve automation services where we supply special automated valve assemblies developed around your specified products or your particular applications. Full CAD capabilities are offered including AutoCAD, Solidworks or other commonly used design and drawing programs.

Our Goal is to make the selection, estimating and delivery of high quality automated valves and flow components as quick and easy as possible.

Here is the original tutorial I watched to learn how to replace the actuator. Their video is better for tutorial purposes–my video is more of an encouragement to non-fix-it type ladies who are feeling intimidated about working on their vehicle. https://www.youtube.com/watch?v=vqbJtTmkYfM

Okay, I’m just a housewife and homeschool mom. I’ve never done any work on cars pretty much ever. Before I was married, I checked the cars fluids on my own and make sure everything stayed at the proper levels, but that was it. My husband and I recently purchased a used 2007 Dodge Grand Caravan SXT. It had a handful of problems but I knew if we tackled it ourselves, we could fix the van up pretty well without spending much more. The driver side window worked intermittently (a default in the switch) and that same switch would stick when pressed downward for the automatic lowering of the driver side window. The other two major problems were the lock actuators in the sliding doors didn’t work. Hence, you couldn’t automatically lock and unlock the doors with a button or key fob. You had to reach around. Normally it’s not a big deal, but with three kids in a busy parking lot and the fact that van sliding doors aren’t designed to be easily unlocked manually from the driver side or passenger side door, it was a real nuisance. So I put together some VERY choppy footage (my camera doesn’t have a pause option while recording), but I didn’t have a tripod to set the camera on, so there are some weird shots where I’m trying to hold the camera and put things together as if I had three hands.
Regardless, the point of this, as exasperating as the process was, is that, if you’re a single mom, a woman on her own, a widow, or a wife whose husband is away on deployment or some other kind of work trip, you can do this! If you have plenty of money, go ahead and spend it–pay the mechanic $65 to do the work for you. However, if you don’t have a lot of expendable money and it’s a fix that isn’t deep in the recesses of the engine, take a chance! Look up the parts, search for tutorials on how to fix the thing (that’s how I learned how to do this! My husband searched for a tutorial and I jumped at the opportunity to try it). Now, as you’ll see in the videos, I did seek out my husband’s help on occasions. He is as mechanically minded as me–which is not much at all! So, I’m at no advantage having my husband help me except I got a break. On my end though, I’m in the middle of a nasty cold and we’re moving so time is scant and pressing, so I was eager to get a break if I could since I was so exhausted and could hardly breathe. Regardless of everything, I enjoyed most of the process. I hope you enjoy yours as well and you don’t get discouraged when things don’t go as smoothly for you as they seemed in the tutorial. I know they didn’t go smoothly for me! But I saved at least $130 in labor and I know I saved a lot in parts by ordering them online for well below the manufacturer’s suggested retail.

In this last video, I don’t know the final steps simply because I’m not a professional videographer and I was tuckered out. I had a lot of trouble getting the door to “pop” back on. Some of the little green and/or yellow pegs had been pulled out when I took the door panel off and fell, some got stuck in the holes. In other places the ‘female’ receiving end pulled out of the door and was stuck attached to the green peg on the panel. I discovered if you used a hammer to remove the pegs like you do a nail, it works great and you can put the pieces back where they belong. Furthermore, I pressed the auto close button on the side expecting it to close because it was almost closed. Instead, it opened and caught the upper window panel (like the door panel but narrow and goes up the sides and at the top of the window). So, some pegs were dislocated from that as well! I had to use a little finesse and just put them where they seemed they should be and hit the panel back in place before the could slide down. Nothing a professional told me, just something when you see it, you know what needs to be done. I hope that doesn’t happen to you because it was plain irritating when I was so close to being done. Well, God Bless and hope you’ve been encouraged!