Attention: Welcome to our new aircraft hydraulics section! We hope you find this section we have put together informative and interesting. You may notice that some part numbers and so forth are blurred out. One reason we didn’t want to post full part numbers because it has taken us months of searches to get the information we have. It wouldn’t be fair to us to just give up our hard work and research. Not too many people know about this stuff and the ones that do don’t want to talk about it. We feel this is just the right amount of info so we don’t upset anyone on either side. The biggest reason for not giving out full part numbers is because we don’t need every lowrider to call up aircraft surplus places looking for things. Most warehouses don’t want to sell to lowriders and the ones that do are raising their prices beyond a reasonable amount because people are willing to pay to much for stuff the warehouse considers junk. Lets keep prices down and think about it before you offer a insane amount for a used pump that needs a rebuild. If you are going to track parts down don’t say that it is for a lowrider. Know what the full part number is, what aircraft it goes in, the proper name for the part and the function of that part. Take the time to research the surplus industry and know the lingo they use. Remember not to use lowrider lingo when talking with them because odds are they have a different term for the part you are looking for. With a little research and some luck you’ll be able to find what you need.
If you are looking to get the most bang for your buck a square dump is the way to go on your setup. Square dumps originally came from W.W.II era aircraft hydraulic systems that controlled things like the brakes, landing gear doors, and ect. In the past original Adel valves were the choice for hoppers but today a Adex dump is usually desired by hoppers. Original Adel valves are very hard to find and if you do they are in usually bad condition. Adex is a quality American made reproduction of the original Adel valves. Squares or candle stick dumps as they are sometimes called have the quickest closing response of any dump used on lowriders. They have almost no pressure loss so your hop will improve. You will notice that most of this section is devoted to the Adel style square dumps but the other types are not forgotten.
In this section we will show you how to spot a real Adex valve from generic squares. We will also show you some good pictures of the different dumps.
Click on the section you wish to read.
Original Adel Squares
Adex Valves Introduction
Adex Regular Duty
Adex Super Duty
Generic Square Dumps
LA Square Dump
Hydro-Aire #8 Dumps
Hydro-Aire “Monster Green” Dump
Hooked Up Square Dump Pictures
Surplus Original Adel Dumps
The original Adel dump comes from military aircraft from the 50’s. The original Adel is a spool type valve. On the aircraft they are called just solenoid valves and brake valves. The original Adel valves are a rare find, since they are no longer made. It is even more rare to find a original Adel in good condition. Adel was bought out by Hydro Aire in 1972. If you are looking for surplus try looking for part number 23500-2 through a surplus parts warehouse. When the original surplus parts distributors like Palley Supply Co. in CA realized the value of these valves to early lowriders they tracked down most of the surplus and sold it off. We were told stories of Adel valves being so plentiful and cheap that when they would fail some people would use them as hammers!
Not sure if you have a real Adel? Not sure how to spot a real one?
Over the years a few people have tried to reproduce valves and stamp Adel on them. Most fake Adel valves will have 1996H stamped as a serial number. The top power connector on a original Adel will have “Bendix” stamped on the connector. Some may have “Amphenol” stamped on the connector if it has been over hauled. These means that the solenoid may have been replaced or fakes have that on them too so be careful. A big sign that the valve is a knock off is a stamp on the connector that says “Adel”. On the brake side of a real original Adel you will also see some numbers stamped on that side. Inside the original Adel valve you will notice the O-ring back up seals are made of leather on the sleeve. Note: They may have been replaced with Teflon backings.
Don’t worry if you can’t find an original Adel then read on about Adex dumps below.
Recently we were very lucky to speak with Andy Lodi from Adex on 8-30-04 and found out some interesting information from him. Andy started out in 1971 with his first cut car that he had a aircraft hydraulic system in. Back then an Adel valve was selling for about $25-$50 a valve at Palley Supply Co., today the same valves can cost hundreds of dollars. From the very start he was taking apart the original Adel valves and drawing out the parts and figuring out how they worked and how to make them better. Before long Andy had machined his own hydraulic valve and showed it to Ted Wells. Many people were stunned and couldn’t believe that it was made by him. Before long word had got out about the Adex valves, Box of Box’s custom hydraulics started carrying the Adex valves in his shop. Many others started to carry the valves because of the quality and accuracy of the valves. Adel valves we too hard to get but Adex made it possible to have a quality dump. When asked how many units have been assembled over the years Andy declined to answer because it’s a business secret. We respect his answer.
Just to give you an idea of how Andy is one word says it all, he is a perfectionist. If a screw hit the ground in his shop it will go in the trash. He is proud of his product and takes great care and pleasure in making the valves. All parts are hand washed and hand assembled on white hand towels. Andy personally checks every single spool before assembly and checks the finished product himself. The valves are built to last a lifetime and he’s not kidding. In the rare event you have any problems with an Adex valve call Andy and send it back. He will make necessary adjustments or fix any problems you may have. When asked if you can tell the difference between an original Adel and Adex valve Andy says there is almost no difference. Every detail has been reproduced exactly, even down to the dust cap on the solenoid. We asked if Adex will ever reproduce a valve like the ” Monster Green ” Hydro Aire dump. Andy replied not likely because that design has been found inferior compared to the Adel and Adex valve. He informed use that a few professionals have switched to Adex valves and gained a few inches as a result.
Andy addressed the issue of the other generic Adel and Adex copies out there. The China made dumps have problems with the end caps blowing off. Other problems include pressure lock and the solenoids going bad. The spool / sleeve generic dump had their spools and sleeves mass produced and were not matched for optimum performance. Another American competitors valves had a very high failure rate because of this “Huge” oversight. Some valves like the old LA squares we were told are a delta style valve in a machined body and hidden in a fake candle stick.
We would like to thank Andy for his time and for contributing to this section.
Adex Regular Duty and Chrome Dumps
The regular Adex dump is an exact clone the the original W.W.II surplus Adel dumps. Like the original square dumps the Adex is a true spool type dump. Today’s technology has been introduced to the design and that means better seals and tighter tolerances. The Adex dump is a affordable investment for your lowrider. Not only will these valves get your extra show points but they will improve your hop and add value to your lowrider. Just one thing that makes a Adex valve stand out from other inferior squares is the details and workmanship you will notice. The valve will be stamped with “Adex” above the part number and on the Amphenol male pin connector. Safety wire will be on all the screws on a Adex dump to prevent tampering that would void the warranty. Even the dust cover for the candle stick on a Adex is an exact replica of the ones that came on new Adel valves. Regular Adex valves will have a stamped replica assembly date and cure date. The chrome Adex dump is the same thing as the regular dump except it has a chrome solenoid and a polished body that does not have replica assembly and cure dates. All Adex Regular duty valves will have a part number of 23500-22 and SUper Duty valves will have 23500-23 on the body. The pictures below show genuine Adex square dumps.
Adex Super Duty Dumps
They say you can’t improve perfection right? Andy did it with his super duty dump valve. These are now available for about 25% more than the cost of a regular Adex. The super duty Adex has some major improvements over the regular duty dump. The first thing you will notice is a heavy duty blueprinted solenoid with improved ventilation near the connector. The end plate of a super duty dump is thick and it has heavy duty screws holding it on for extreme hopping.
Adel Style Generic Dumps
The popularity of the original square dumps sparked a movement to make low cost replacement valves from machine shops. We have heard mixed things about these valves from many people. In the world of generic squares basically you have two types of valves, spool type and poppet (cartridge) valves.
The spool type of generic square dumps is similar to an original Adel or Adex in how they operate. The big catch is that these generic dumps are made cheaply of low cost materials and poor engineering has caused poor parts tolerances. The spool / sleeve generic dump had their spools and sleeves mass produced and were not matched for optimum performance. Another American competitors valves had a very high failure rate because of this “Huge” oversight. This poor quality means leaks, part failure or worse. We have heard about the end plate blowing off these valves.
The cartridge type of generic square dumps are basically just a Sterling or Delta valve in a machined block with a hidden coil in the candle stick. What’s bad about these valves? Well, they do not perform well in competition because they are not a accurate valve.
Many of these generic squares do not have a finished look to them. The bodies are not polished or not anodized. These valves are some times sold as Adel but you can see clearly that they are not the original valves. Check the original Adel square section above if you need a idea what to look out for. So if you are considering one of these valves think it over because they are just a little less than a Adex that has a lifetime warranty. Generic squares do not have a warranty.
LA Square Dump: A Close Look
In the early and mid 90’s Red’s Hydraulics released a version of the original style square dump. This copy is a cartridge type dump like a delta or Italian type dump valve. This valve is not a real square dump but it is a look alike. It is still lumped in the same category of generic squares though. Out of all the generic squares we’d probably pick this one not for it’s accuracy but for it’s OK reliability. Just remember it’s the same type of valve as a standard dump but in a fancy package.
The nice thing about this valve is that the plate on the bottom is only for cosmetic reasons. You will not have to worry about blowing the plate off the body like other cheap squares out there. The body has no painted or stamped markings other than near the three ports. The valve body comes in a raw looking aluminum finish.
Hydro-Aire #8 Dumps
If you are looking for an authentic valve to use a Hydro-Aire #8 is a good valve. Most of the Hydro-Aire #8’s had round cast bodies that were likely to crack under serious use. The cast body valves are known as round bottom dumps. Only use round bottom dumps on your rear or on aircraft pump setups. The original square body version of this valve is rated for the same pressure as a round body valve. It is considered a more durable and valuable valve in the lowrider scene. Square bottoms or square bodies are machined from a solid block giving it more strength. A square bottom would be ok for use on a front pump. A Hydro-Aire #8 valve would be a step down from a Adex valve but it is still in use on some aircraft hydraulic setups in a few lowriders.
If you are lucky enough to have a Hydro-Aire #8 valve in your possession you will notice that the solenoid will either be made by Wesco, PSP and sometimes IMC. The solenoid is a very important detail because the dump uses different plungers for the different types of solenoids. We figured out that two of the solenoids uses a 1 1/2″ plunger (IMC) and another uses a 1 1/8″ plunger. If you plan on replacing the solenoid you can use either type on your valve as long as you have the matching plunger too. If you are having a problem with one of these valves pressure locking it can be easily fixed by making a few adjustments to the valve. If you are having this problem contact us for assistance.
Learn how to rebuild and check your #8 Hydro-Aire valves. Click here
Hydro-Aire “Monster Green” Dumps
The Hydro-Aire monster green is on of the biggest square dumps out there for your lowrider. These days these valves are more sought after than the OG Adel valves. This valve came in a few sizes all the way up to a #16, the most common size it the #12. The valve is unmistakable because it has a odd shape and only two ports. Having two ports makes this valve undesirable for aircraft setups but good for single pump hoppers. The monster green is not better than an Adex valve. No questions asked which valve is better, remember that bigger isn’t always better! The valve also has a manual release handle. Some monster green valves are stuck in normally open mode and must be converted to normally closed mode before use in a lowrider. If you have questions about converting a valve over please contact us, we can convert your valve for a minimal fee. These valves are known to be seen with their green paint badly chipped off of them. They came in several shades of green and we have heard some came in gray and some in blue! A real monster green has three sections in the body. A real monster green has four bolts on the bottom of the valve near the handle end.
There is a valve out there that looks almost exactly like a monster green Hydro-Aire except for a few differences. This other valve is made by a company called Hydraulic Research. These Hydraulic Research valves have a one piece body but they do have release handle like the monster green. A dead give away that the valve is from Hydraulic Research is that there are no bolts on the bottom of this valve.
Whittaker made a valve that may fool a few into thinking it is a monster green. It has a different shape body than the monster green. A dead give away is that the Whittaker valve is usually four port valve.
This valve is another common dump sometimes used by lowriders. It is often confused with the Hydro-Aire Monster Green dumps.
Other dumps are out there that are not commonly used but we figured we would show you some different things.
Hooked Up Square Dump Pictures
Looking through a lot of pictures in magazines of cars with squares we noticed that many of the installs don’t have connectors. Many of them have cheap push on connectors or they even solder a wire to the solenoid pin!! If your going to spend the money on a square then why half ass install them? If you look through some catalogs like Allied Electronics you can get them from about $15-20 each. The hydraulic shops are charging about double for the same thing.
Dumps such as the Adel, Adex and Hydro-Aire #8’s use Amphenol 97 Series formerly ( MIL-C-5015 ) 14s ( shell ), 9s ( insert ) connectors on the solenoids.
Straight Plug: P/N 605-5011 *
90 Degree Plug: P/N 605-7015 *
and you will need:
Clamp for plug: P/N 714-2503 *
Monster Greens and Whittakers use Amphenol 97 Series formerly ( MIL-C-5015 ) 12s ( shell ), 3s ( insert ) connectors on the solenoids.
Straight Plug: P/N 605-4000 *
90 Degree Plug: P/N 605-6999 *
and you will need:
Clamp for plug: P/N 714-2502 *
* – Allied Electronics Part Number. All part numbers are for olive green finish Add 689 to the end of the part number for electroless nickle
The connectors are easy to assemble and make servicing your hydraulics much quicker. The wire can’t just pop off the pin either because it is a threaded on military connector.