Id like to see a picture of those installed under the hood...
No installed pics, but I have some fitment pics. First though I will start out with pics comparing the two filter assemblies.
This is the part number for the Alexin:
This is a standard unit used for both OEM and aftermarket. Here's the spec page.
Keep in mind that the flow ratings are WITH the "safety filter" installed, and the unit will flow approximately 30% more if the safety filter is deleted. For some reason, no applications are listed on the housing page, but the filter that fits in that housing (P780522) ONLY fits the 9" Alexin. If you go to the filter spec page
you will see all the applications that use the 9" FPG Alexin. With the exception of the Volvo ECR235C tracked excavator which uses the Volvo D6E 6-cylinder engine, all the apps listed are 4 cylinder engines. Keep in mind they are designed to load up with a lot of dust before needing replacement, so the filters are relatively oversized compared to a filter used in an on-highway app.
The Powercore PSD filter I got is a Freightliner OEM unit. The Part number is D100137. It is identical to the standard D100029 with the exception of outlet size: the D100029 has a 5" outlet whereas the D100137 has a 4" outlet. Here is the specs for the standard D100029
. Keeping in mind that these specs are WITH a safety filter in place, they're quite impressive. Again, no applications are shown for the housing. You have to look up the filter part number
to see the applications. You will see the applications include B6.7's, C8.3's, and even a CAT ACERT C13! Yup, the Powercores definitely deliver the goods in a relatively (compared to a radial filter) compact package.
It should be noted that the PSD's are also available in horizontal configurations with different outlet and service access locations. You can find all the standard (non-OEM) configurations on this PDF
. On top of that, the PSD 8, 9, and 10's and are available with two different length filter elements. The D100029, D100030, and D100072 have the "short" elements, while the D100031, D100032, and D100068 have the "long" elements. The long elements increase the airflow somewhat as shown on the D100032 spec page
. They also obviously hold more dirt before becoming unserviceable. The only drawback is that they make the already long housing another 3" in length, about 21" overall. The bigger PSD12 andPSD14's only come in one size: frickin HUGE! If you want to fit one of these bad boys under the hood, break out the sawzall
One little tip: It seems that OEM PN D100033's are popping up on Ebay. These appear to be gummint surplus for MRAP applications. If you're interested in a vertical configuration PSD10, these come with a safety filter and a Donaldson blue nanofiber filter installed!!!! These units are really nothing more than a D000029 shipped with a nanofiber filter rather than the regular cellulose filter that the D000029 ships with. The only thing they don't come with are the threaded mounting clips, but those are cheap. Also, new surplus P605536 blue nanofiber filter elements for these filters are all over Ebay for cheap, and besides fitting the D100033 housing they will also work in the D100029, D100030, and D100072 housings (all the "short" PSD10 housings). In fact, I'm gonna score myself a couple. That should last me 10-15 years
Anyway, back to the main subject. Here's some pics of the Alexin disassembled:
Looking into the inlet. The inlet is out of round because it was stuffed into a box improperly. It straightens right up with a hose clamp
You will note that the filter element isn't visible. The air hits that barrier and is forced to travel in a spiral to throw all the large dust to the outside, where it makes it's way to the vacuator valve and is discharged due to action from intake pulsations. It's a pretty cool setup really. I should note that the housing can be mounted in a variety of orientations with one caveat: the vacuator must be at the lowest point.
Here's a look down into the outet. What you are seeing is the inside of the safety filter.
Access cover removed. This is the primary filter. Area-wise, it is equivalent to a BHAF.
Primary filter removed to expose the safety filter.
Safety filter removed. Here you can see the barrier that separates the incoming air from directly impinging on the primary filter, and instead causes it to swirl:
It's a bit easier to see if I poke my fingers in the inlet:
The boss in the center where the outlet is is where the filters seal. They are radial seal with soft urethane; the safety filter seals on the inside of the boss, while the primary filter seals on the outside. Because that is all one piece with the outlet there is no possibility of air leaks at any seams. This allows you to rotate the outlet so you can clock the filter minder port to any position you want, and there are no seals between the outlet and main housing to get compromised and leak by doing so.
Here's the primary and safety filter side by side.
The safety filter just fits inside the primary - no space is wasted. Despite the blue color, the safety filter is not nanofiber. It is some kind of foam from the looks of it. It's just designed to catch any crap that might be knocked loose during filter servicing or an improper primary filter install. The idea is that if air leaks past the primary, the safety will catch the big stuff, and the small stuff will spike your UOA and let you know there's a problem before any real damage is done to the engine. This of course assumes you actually do UOA's
Here's some side-by-sides of the 9" FPG Alexin and the "short" PSD10. Keep in mind a "long" PSD10 will be 3" longer than the one shown here.
This is the clamp band used to mount the Alexin. The teeth on the inside allow you to clock the housing, and hence the inlet, to pretty much any position. Because the vacuator has to point down, the access cover is likewise clockable, so no matter the orientation of the body the cover can be installed with the vacuator at the bottom. And, as I mentioned, the outlet tube is also clockable to put the filter minder port in any position. This makes the Alexin very flexible from a mounting point of view.
Speaking of the vacuator valve, this is what it looks like close-up:
The valve is made from very soft durometer rubber, and the way it works is that the pulsations in the intake tract make it rapidly open and close while the engine is running. When the pressure is slightly positive and it opens, any accumulated dust is blown out. When the pressure goes negative, the valve closes to prevent any air or water from leaking through and bypassing the centrifugal dust separators. Now, if you are operating someplace REALLY dusty, like an open pit mine, you can replace the vacuator valve with an exhaust-driven scavenge system that maintains constant negative pressure at the vacuator port and prevents the excessive dust from clogging the works.
Here's the inlet swirlers on the PSD. They spin the incoming air, flinging the dust outwards and into the open housing where it drops to the bottom where the vacuator is located. Clean air travels through a coaxial tube in the middle and into the filter compartment.
Here are the aforementioned tubes which feed the relatively clean air to the inlet face of the filter element:
Here's the outlet side of the PSD housing:
The primary element seals on the 1" wide step. The safety filter rests against the little tabs and seals against the inner part of the housing. The brass plug is plugging a 1/8"NPT port where you can install a filter minder or gauge.