Rob

Yes, I would think you are correct. It is a polyurethane material and exposure cracked in several places around the interior periphery. Given this only seems to leak profusely on the retraction stroke, (boom down) I would wager the sealing rings on the piston are still operating satisfactorily. It really sprays on the retraction stroke, yet is a restrained leak on the extension stroke.

Welded at the top: Top seal pushed out:

Hi Paul and thanks. The bottom is just about two inches from the rotary coupler so no real room there to move around. However, the bottom mount is a trunion with a cap as shown here with #'s 19-20: What I plan to do is to elevate the boom as much as possible, secure it in the upright position, remove the bottom trunion mount caps and loosen the upper pivot pin shown here in #'s 17-24: Then retract the cylinder as in dropping the boom which will pull it up and out of it's cavity. I can then secure it to the lifting apparatus, remove the upper pin, and massage the cylinder clear. If measurements are correct, I shouldn't be too far off and it will come out fairly easy. Thanks for your suggestion of contacting people whom do this work. I was able to speak with JLG technical support and to a gent whom actually worked on these when they were current. They did almost what I'm proposing but had a special clamping and rotating "jig" they used to lift the cylinders which clamped onto a forklift tine. I could make something similar and will look into this further. Thanks, Rob

I've ordered a lot of parts through various suppliers for Fuller transmissions and most have been stamped Korea. Most, not all as some of the roller bearings have been China., and some United States.

I am not 100% sure if I could leave the barrel in place or not. However I'm going to replace the hydraulic hoses at the same time and it looks much easier to do this if the cylinder is out of the way. The upper portion of the cylinder rod is a "T" and I've looked at it as a welded assembly. However viewing the diagram below, the cylinder rod could be threaded on the end with the cross tube forming the "T" and secured by a set screw, (#27) to prevent loosening. This setup is not apparently obvious from the vantage point I've had to this point. I will look later this morning when out to the shop.

This is kind of what I'm up against with the cylinder lift. The lift cylinder resides in the center of the machine between the strengthening ribs. In front of the cylinder base is the rotary coupler which allows hydraulic fluid flow to the steering, drive wheels, and axle spreading cylinders. The cross tube you see in the photo(s) disallows the lift cylinder to be tilted very far so it must be pulled out almost completely vertical: I'm thinking if I can attach a cinch strap around the mid upper portion of the lift cylinder body and pull it straight vertical, a helper can rotate the complete cylinder assembly towards the horizontal plane as the height increases clearing that horizontal tube. I could then back straight out with the skid steer. I did find a couple of square tubes in the shop I could use for weldments to secure the boom in an upright position. These would be cut off after the rebuilt cylinder is reinstalled. Little hard to say for sure as I'm still in the thinking stage of the game.

I turned one out on a lathe from a brass sheet many years ago and it's never leaked. That however was on my RD-450 engine in a R-190 IH truck which used the same setup. I couldn't find the original type ring seal neither and that was back in the early 90's.

Not the best photo to demonstrate the ways or means, but I may use the bridge of my rolling gantry under the boom of the lift for support. If I lash the top of the gantry to the bottom of the boom so nothing will move, I may have enough room to negotiate the main lift cylinder free of the chassis with a helper to rotate the cylinder as it is lifted. Pay no nevermind to that ugly old truck hogging up the aisle.

Seal kits showed up yesterday and they are complete. Now just gotta figure out how to extract the cylinders from the machine to move forward with the project. I'll have to think on this for a spell and will post findings.

You know the old saying "When the cat's away"? Well carburetors get rebuilt on the kitchen counter around my place. This is a Zenith updraft from my portable air compressor with Continental B-427 engine and it had clogged jets and a stuck float. I should have snapped photos but after an all day soak in a methylene chloride bath, (I'm old school) it is sparking clean inside and I just rinsed it clean with hot water and put it back together: Now as far as the "Mice will play" part of that story, This guy didn't fare too well as I got his ass with poisoned peanut butter last evening: The Rotgut bastard is just about nine inches long too!

Also have 62, 80, and 51. These are all antique plates in IL.

No wonder I couldn't get that plate number!!! I have 57, and 58.

Well sheesh..... Still ain't got no seal kits for the lift and the oil slick underneath continues to grow. I have it getting soaked up in absorbent pads, but I'd like to get this puking SOB fixed. EFF'n USPS tracking shows the kits left MI, (212 miles distant from me) on Friday and are now in Columbus, OH after going to St. Louis, MO. Now they'll have to go to Peoria, IL and the next day finally to Farmington, IL for delivery to me. This of course after their tracking information is dormant for two full days. And these people cannot figure out why they're broke as an entity other than blaming lost revenues on email.

No problem. Thought you were going to wholesale replace them and were looking for a diagram and wanted to furnish the correct one. Colors don't much matter to me with wiring or air lines.

Salisbury NC? I upgraded some runway landing lights at the approach end of runway 20 there several years ago. From the north end looking south the flashers or strobe lights and strobes at each side of the pavement. I upgraded the antiquated equipment to a more modern style with radio remote control functions.

The 400 series was a common compressor before spring brakes were the norm and it's displacement is smaller than the 12cfm of the 500 series. Regardless the 500 will build air much faster than the 400 series is probably the best benefit to upgrading. It does weigh a little more and certain takes a bit more power to operate but both of those are negligible concerns.

Paul; I never seen where you replied to the transmission you have when asking about the lines. I'm certain I have a diagram for the hose routing but I've not seen colored lines in the application myself. However, all my stuff, and stuff I've worked on is older now and all lines are black.....

This is the part of that photo I wanted all to see:

I snapped this in the afternoon on a delivery. Sorry for the glare:

I think he is probably the most pompous individual I have ever met. Sister in law and wife haven't got along for over 35 years so all this is perfectly normal. Although my wife is more sedate, or overlooking, since retiring from the competitive circuit, I'm told I more than make up for her lack of confrontational style. If they know I'll be at some function, they find a way to "excuse" themselves. We have never seen eye to eye on anything; even through my mother in laws stroke last year. Give you an example; Back at Thanksgiving dinner in 1983 we all setting down at the table to eat. Keep in mind I used to be fairly civil till provoked and this dinner was to be no exception. I set my hindquarters in the seat I always occupy, obediently complying to my wife's burning glare to listen to my mother in law say the blessing, just prior to grabbing a couple large ladles of mashed potatoes and slathering them in gravy. Just about then Mr. Assbreath himself says to me, and I quote, "The napkin goes on your lap, not in your collar". My immediate reply and I once again quote, "What, did your ex husband teach you table manners"???? To which I though my mother in law was going to blow groceries and my wife was going to backhand me after she stopped laughing!!!! Needless to say, the in laws were not too happy and packaged up their meals into "Tupperware" bowls, went home, and didn't attend another family function with me around for 22, or 23 years and I'm serious. I sure missed them too. Nobody to pick on when they're not around.

Gotta tell ya'll about a little story concerning the hypochondriacs in the family. Now it may sound crude but I damned near shit on myself when my wife informed me earlier this morning. These two morons, (my dear brother and sister in laws) whom don't associate with literally anybody not sporting a mask or whom has self quarantined for their require two weeks are aged 69, and 65, respectively. She, (wife's sister) just turned 65 and became eligible to receive the vaccination shot for the Covid-19 virus and both signed up together as if one's ass cheeks are in the vicinity, the other's lips are there also and vice versa. Anyway because they were on the list but a ways down, they conjured up the idea to check surrounding counties, (they are in Michigan) and were told they could get the shot if there were cancellations as the list was already fully populated. Their home county made no such allowance so off to the neighboring county they went in high hopes. It turns out he was able to take the such path due to a 70 year old woman cancelling her appointment. Almost seven hours later, she got her chance with a cancellation from a 66 year old man so all was good as they both got their shots. Two days pass and guess what????? She comes down with a sudden medical emergency requiring a trip to the hospital as deemed a reaction to the vaccine. In fact it is so bad an ambulance is called for transport. The medical emergency? A 100.3 degrees Fahrenheit temperature and a sore injection point!!!! I'm told her normal is 98.8 which is checked a "few" times per day. She was sent home with a prescription for Ibuprophen at their local drug store. Keep in mind these "antics" are standard operating procedure for these ass wipes

A "Hold my Beer" moment for certain. Smarter ways to do things out there but you got the job done and lived to tell the story so it's all good.

Common around here to be asked for fire extinguisher, fuses, and bulbs, or lamps. This is usually only when they are digging and don't find major flaws or infractions. Driver "attitude" has a lot to do with it.

This one is quite involved but no "Amphenol", or "Cannon" plugs involved. Lot of terminal strips however. I did find a couple of tight spots in the cable tray/chain when extending the boom which I will address later. The cable covers have long disintegrated from exposure as has a good portion of the jacket on the exposed 16/24 SOOW cable along with the others of various conductor counts. Having a rotating man basket, many of the wiring strands have long lost both their jacket, and insulation exposing the bare strand conductors. I've spent quite a bit of time facilitating repairs to these type items to prove the unit worthy of correct repairs before sinking a lot into it. This unit had sat right here untouched for nine full years and was very close to ten before I wound up with it: They had been using it via two men with one operating the manual controls from the ground, and one in the basket calling directions till leasing a new JLG from a local dealer.