We Don't Need No Stinkin' DVDs - Digital Media Players for your RV

Finished Retrofit Of Old TV 

    A while back I wrote an article about changing over your old RV Television to a computer LCD monitor. It has better resolution, uses less power and is a lot lighter. I installed a box that would allow me to play my VHS/DVD/Satellite/Digital TV through the monitor using the existing VGA connector. This has been working great. Lately, many people are playing their entertainment on their computers or "streaming" video from the internet. Nowadays you can do that on your smart phone! Since I already have a computer monitor, it stands to reason I should be able to play back digitally stored audio and video files on it. Say from an external Hard Drive or one of those newfangled "thumb" drives or even a memory card of some sort. Usually these are connected via USB which most computers have from the factory. Now I already have a way to feed VGA signals through my converter box and into the monitor. It's a "pass-through" so I don't even need to turn the converter on to see VGA displayed on the monitor. I could simply hook up a laptop to that VGA in and be done with it. You've probably already guessed, that was WAY too easy for me. I had to get fancy.

KWorld M130

On the market are quite a few gadgets that will allow you to play your digitally stored video from a USB connected device on your TV. I could have used any of those. However, I would have had to remove one of my existing inputs. Sacrificing my DVD or Satellite or VHS or Digital TV wasn't going to happen so I had to find one that used the only connector I had left. VGA. That doesn't mean you can't connect via HDMI (which I don't have) or COMPONENT or even COMPOSITE Video. I just figured if I already have a high resolution monitor I should use it to see HD.

That being said, I set out to find a model that would give me the best mix of digital media playback AND low power consumption, in addition to the aforementioned VGA output. There are A LOT of these beasties floating around the internet! I finally settled on one by a company called KWorld. It was the only one that would play back almost any media I could throw at it and it had the VGA output. It was pretty small at only 5" x 3" x1" and used very little power at 12Volts. Less than .5 amps. None of the ones I looked at had network connectivity. This means I couldn't use it (when connected to the internet) to play media from any of the online streaming providers like Netflix or Hulu or even YouTube. Since I have a convertible Android Tablet/Netbook that wasn't really a problem. Nor a feature I needed the new box to provide. You also wouldn't be able to play files stored on your laptop through the ethernet or wireless connection. You could simply copy the files to a thumb-drive or memory card and play them that way.

Re-Wiring!

As everyone who reads these articles knows, I am always short on space in my RV. Any space i have tends to be small so I like to maximize what can stow in any given "cubby-hole." With a judicious amount of wire re-arranging I managed to make a small space that this unit, being so small, fit right on top of. Sitting on the box that converts everything to VGA (yes, it has a pass through!). After installing the box and making sure the wires were all squared away....nothing worked. *sigh* Now what? I pulled everything back out and it turned out to be the AC/DC power adapter wasn't making great contact with the power strip. A little bend of the AC plug prongs outward and we were in business!

Finished Install

The system works well and by running the sound through the in-dash stereo system I have great pseudo-surround sound with decent bass. At some point I'll clean up all the wiring to make it neater looking or figure out how to hinge the LCD Monitor to allow easy access to the big empty space behind there so I can hide it all! 


I do still have the annoying "hum" coming from someplace, but that's another project!


Be Seeing You...Down The Road,


Rich "The Wanderman"
www.thewanderman.com

Keeping It Cool - Installing a Transmission Oil Cooler Fan Pt 2

Finally, a weekend with no rain forecast. Not that it wasn't the case last week, but these "meteorologists" seem to make guesses rather than actual predictions based on fact. Maybe I'm just bitter since it put a stop to my relaxation activities. Mainly, working on my RV!

So now that I can comfortably(?) lay under the RV and not get soaked, lets finish up the transmission oil cooler supplemental fan install. You know, that's an awful lot of words to just say "fan." We left off with all the parts assembled and ready to install.

My Transmission Oil Cooler in The Front Engine Bay

First I attached the fan itself to the back of the transmission oil cooler. I thought about making it a "pusher" fan rather than a "puller fan" by mounting it on the front, but I believe I will get better airflow by sucking air up from below the front of the engine compartment rather than air from behind the engine and transmission. Once everything is in place, I'll put a temperature probe in there and see what's what.

Opposite side from the Fan With Sticky Pad and Lock in Place

Hold Downs

The fan get's mounted using long plastic hold downs with a circular stopper on one side and a spring and cap on the other. It is inserted through the tabs on the fan and through the cooler itself.

Almost Finished Install - Viewed From Front

You then slide on the supplied padded squares, with the sticky side toward the radiator, over the rod. These stick to the radiator and offer some padding and vibration resistance. Once done, make sure the fan turns freely and doesn't hit the cooler. If it does use a spacer or washer to add some gap. Too much gap is no good, as air will escape around the fan instead of cooling your transmission oil. Then comes the circular lock. BE CAREFUL! This will only go on once. It cannot be removed without destroying the rod or the plastic lock, so make sure everything is where you want it before you push them on. Once tight, snip the extra rod leaving a bit protruding.(1/4-1/2"-ish)

Tight Install Behind Transmission Cooler

I had very little clearance behind the transmission oil cooler, and the top of the fan hits the surround of the engine radiator's supplemental fan, but just a very little bit. It also hangs down a smidgen since the fan is actually 10" across even though the specs show it to be 9" wide. If I were to do this again (NOT!) I would buy an 8" fan so the total size would likely be 9". Ah well, at least when you buy a fan you'll get the right one!

Accessory Switch is Second From Right, Bottom Row

Next was the electrical hookup. This was, by far, one of the easiest I've ever done. The negative lead (BLACK) runs over to the Negative terminal of the battery or, even easier, to a convenient screw already in the chassis. (The Chassis/Frame IS a ground.) The other (POSITIVE) wire will go to one side of a switch near your driving position. Sometimes this is REALLY simple, but often can be tough since the wire MUST go through from the outside to the inside. Then the wire gets hooked up to a fused power source. This should be from your Engine's wiring, NOT the House system. There is usually someplace you can tap into within the existing fuse block. I used the ACCESSORY switch that was already in the dash, fused and unused. You can easily add a switch to your dash (or other convenient location.) If you cannot find power inside, you could run another wire back out, and down to the battery's positive terminal making sure you have a correctly sized fuse installed on the wire. If you go this route save time by running two wires at the beginning!

Supplied Electrical Install Kit

This is the time to decide if you'd like to install a thermostatic switch. It will turn the fan on at a predetermined temperature and back off when it is reached again. I have one, but didn't install it. I want to do some testing before I let the system work on it's own.

Once it's all hooked up, make sure that the fan turns the right way! If it's behind the cooler it should draw air THROUGH it from front to back. If it's in front it should push air through the cooler. If it's wrong, you likely have the wires reversed. On many fans this is the way to reverse the direction anyway so it's not too big a deal if you get it wrong. Just switch the wires at the fan and you're good to go.

WARNING! Some fan manufacturers want you to actually remove the fan blades and turn them over to switch the direction of the airflow. Switching the wires MAY damage this type of fan!

Finished Install

You should use heat shrink tubing or some other method to waterproof the connections that will be outside and usually underneath the RV. They will be subjected to some nasty elements like road salt, water...etc. It's a good idea to protect them. Yes, I know...put the heat shrink tubing on BEFORE you put all the wires together. See even I can learn after several mistakes!

I believe I will see some significant reduction in temperatures. Stay tuned, after the season I'll tally the results and write it all up.

See Part - 1
http://www.thewanderman.com/2012/06/keeping-it-cool-installing-transmission.html

Be Seeing You...Down The Road,

Rich "The Wanderman"
www.thewanderman.com

Keeping It Cool - Installing a Transmission Oil Cooler Fan - Part 1

Supplemental Transmission Cooler

   At some point in its life, my coach had a supplemental transmission oil cooler installed. This is a good thing. If you "cook" your transmission oil, bad things will happen. The fluid is cheap, your transmission isn't. On a recent trip driving through some mountainous terrain, I noticed my transmission temperatures were higher than I'd liked. I decided that adding a fan and maybe a thermostat to automatically turn it on and off  when needed would be a good idea.

Let's talk a bit about automatic transmission temperatures in general. The harder the transmission is working the hotter the fluid gets. Common Sense, right? Pull a heavily loaded RV up a long hill, sometimes with a trailer or toad behind, and the transmission temperature will climb. In fact, it can climb VERY fast. Especially when it's very hot and humid. Many RVs have some kind of transmission cooler already installed. Sometimes it's as "simple" as a few extra pipes inside the engine coolant radiator and sometimes it's a separate radiator entirely. My Aero Cruiser had the former and a previous owner added the latter. For some reason they decided NOT to add an electric fan on this supplemental cooler. I have NO idea why. Most manufacturers of transmission fluid say, if the fluid gets above 300 degrees Fahrenheit for any length of time permanent damage could be done to the transmission itself. Some manufacturers state you can get 100,000 miles from the fluid IF it remains at 175 degrees or below. This chart shows how the life is shortened with temperature increases:

DEGREES F	MILES	DEGREES F	MILES
175	100,000	295	1,500
195	50,000	315	750
215	25,000	335	325
235	12,500	355	160
255	6,250	375	80
275	3,125	395	40

Wow, 40 Miles! I'd hate to have to change the transmission fluid that often! Personally, I can accept every 25,000 miles. So, shooting for an average temperature of 200 degrees seems reasonable. I have seen 250 degrees on a long hill, mostly due to airflow issues. I am hoping the fan will fix this. I COULD remove the plumbing for the auxiliary cooling loop in the radiator and likely reduce the starting temperature a little since the transmission fluid wouldn't get heated by the engine coolant flow. The down-side is getting the transmission fluid up to operating temperature in colder weather. We'll see what the readings are this season and make changes accordingly.

The Fan.

Thermostat Switch and Relay

After researching online I selected a 9" 12 Volt 80 Watt Fan that would move enough air to make a dent in the temperature. When the fan arrived, it was missing several critical installation pieces. After a quick email to the seller, I received a package that came with all the mounting hardware including springs to absorb vibration caused by the road and the engine. I also ordered a remote thermostat that would be adjusted to turn the fan on at 175 degrees (or so) and off  again. This installs on the radiator itself and has a relay that feeds the power to the fan. The remote switch will allow me to manually turn the fan on if needed.

Looked to be easy to install. Of course the location of the transmission oil cooler and the fact that the 9" fan was actually 10" across (the BLADES are 9") meant I was going to have to either let it hang below the cooler or finagle an angled mounting. When I got to thinking about the angles install I believed the slight angle would actually pull cooler air from under the RV rather than warmer air from the engine compartment. Seems logical, no? This being decided, I gathered all my tools and the bits and pieces of the fan install kit and went down to the RV.




With everything laid out and ready to install. It began to rain. Again, a lot. Since I was going to have to lie down on the ground under the RV to install this fan, I decided (for once) to postpone the install until next week. We'll cover the actual mounting of the fan using the supplied pieces and wiring all of the electrical to make it all work. I feel bad this couldn't get done this week, as I REALLY want to get on the road...but getting soaked seemed a dismal prospect.

Tune in next week for the final assembly!


See Part 2 - http://www.thewanderman.com/2012/06/keeping-it-cool-installing-transmission_19.html

Be Seeing You, Down The Road,

Rich "The Wanderman"
www.thewanderman.com