A/C to OBA conversion write up -PICS - Page 11 - JeepForum.com

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post #151 of 297 Old 09-17-2009, 08:25 PM
Old99Cherokee
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Ok, I know its been discussed earlier, but none of the previous posts solve my problem. I am using the Sanden Compressor, and an inline tool oiler, however I can hear the poor compressor starting to squeal with just the oiler alone. I feel like it needs more oil than the inline can provide, and this is possibly because the inline oiler is meant to be under pressure, aka not in an intake setup. I read something about putting grease directly into the compressor itself. Does this actually work / is it suggested?

Here is a picture of my setup, right at the compressor. I bought the tool oiler from sears for $10 so i don't know if its different from the others I've seen in previous posts.


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post #152 of 297 Old 09-17-2009, 11:58 PM Thread Starter
RussoGuitar
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Quote:
Originally Posted by Old99Cherokee View Post
Ok, I know its been discussed earlier, but none of the previous posts solve my problem. I am using the Sanden Compressor, and an inline tool oiler, however I can hear the poor compressor starting to squeal with just the oiler alone. I feel like it needs more oil than the inline can provide, and this is possibly because the inline oiler is meant to be under pressure, aka not in an intake setup. I read something about putting grease directly into the compressor itself. Does this actually work / is it suggested?

Here is a picture of my setup, right at the compressor. I bought the tool oiler from sears for $10 so i don't know if its different from the others I've seen in previous posts.
Try a mist oiler, theyre a little more pricey but seem to work well.. and i wouldnt use grease.. maybe set up a little port where you can add some oil directly into the line occasionaly
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post #153 of 297 Old 09-18-2009, 08:33 AM
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I'm not sure the mist oiler will work for me, the only way I got the squeal to go away is to drip tool oil directly into the compressor, fairly quick drip too. Also I'm pretty much out of money when it comes to this project. I appreciate your advice though. Any suggestions on how to set up the add oil port? This Sanden says it has a 240cc oil reservoir using SP-20 compressor oil, could this be of any use or no because that would only oil the internal side of the compressor? If you need more pictures let me know.
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post #154 of 297 Old 10-02-2009, 08:49 PM
4LarXedo4
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sorry about bringing up an old thread but it better then being yelled at for starting a new one.

I don't see a full agreement on what oil is actually being used in the oiler. i saw air tool oil mentioned, is that what everyone is using? what about PAG oil which is the oil used to lubricate the a/c compressor when its functioning for a/c.
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post #155 of 297 Old 10-02-2009, 10:53 PM Thread Starter
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you can use almost anything but i try to stay away from anything to thick, recently ive been using marvel mystery oil, seems to work well.
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post #156 of 297 Old 10-04-2009, 03:45 AM
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So far I have used the air tool oil which when added in large amounts before the compressor is started seems to work for about 3 mins before a wearing sound appears. Then I tried using WD-40 while the compressor is running, adding it every minute or so, or when the wearing sound reappears. So far this has kept my compressor alive, but it burns through a bit of oil and requires too much attention for it to used effectively. Next I am going to try some PAG-20. I'm not sure of the best way to "add" it though. Should I add it to the intake before I start the compressor? Should I put it in the so far useless oiler I bought? If I get my hands on some of that mystery oil, how should I use it?
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post #157 of 297 Old 11-17-2009, 07:50 PM
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PAG-20 didn't work, am doubtful of the mystery oil, any suggestions as to how to add the mystery oil to the system?...really trying to avoid the $40 mist oiler because I am not sure it will work.
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post #158 of 297 Old 11-17-2009, 08:26 PM
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I rarely add any oil to mine. Maybe its just lazyness and thinking it will be ok but so far it has been. I only use it to air up 4 tires. I can go from 8psi to 28 psi in less then 5 minutes per tire when everyone else is still airing up

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post #159 of 297 Old 11-29-2009, 11:37 PM
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great thread lots of details awesome job. thanks.. was thinking of putting in air horns. so this answered the couple of my questions.. great can run air tools aso.


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post #160 of 297 Old 11-30-2009, 12:19 AM
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Good write up. I have a friend who is going to do this soon. I would but I rusted my A/C compressor when I flooded it so now I just have a by pass pulley haha.
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post #161 of 297 Old 12-03-2009, 08:23 PM Thread Starter
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Originally Posted by Old99Cherokee View Post
PAG-20 didn't work, am doubtful of the mystery oil, any suggestions as to how to add the mystery oil to the system?...really trying to avoid the $40 mist oiler because I am not sure it will work.
sounds like you just have a bad compressor.. even rotary compressors, like the sanden, will keep some oil in the compressor, it doesn't all just blow through. Try a different compressor.
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post #162 of 297 Old 01-17-2010, 04:59 PM
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started gathering all the parts for this today.. all i need is an air tank the manifold and the hose n some fittings... getting the hose n my old freon drained tmrw for FREE!!!!

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post #163 of 297 Old 01-17-2010, 05:44 PM
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Walmart sells an ideal 5 gallon tank for $25. They also have a 7 gallon for a few bucks more. The only disadvantage to them is they only have the one 1/4" inlet/outlet.

Manifolds, hoses and fittings can be gotten at any Harbor Freight.



I did my setup slightly different. I currently have no filter or oiler on the input of the compressor. But I have a spare compressor just in case. I've used the hell out of mine (probably filled my 5 gallon tank 100-150 times now) and have had no issues.

I come off the output of the compressor and immediately go down to 1/4" hoses. Then I have my manifold right behind the battery. There I have the pressure switch and the output to the dash mounted gauge. Then I ran a 1/4" hose to the rear compartment where there's another manifold with another gauge and the safety valve. This is mounted right to the tank. Then I have a 1/4" coil hose with a quick disconnect.

Things I would do different on my install :

1. Run 1/2" hoses and fittings. 1/4" is okay, but there's been a couple times I could have done with better air flow.
2. Put a 4 way manifold instead of the 3 way up front and run a front quick disconnect.
3. Put in a 100/125psi switch instead of the 70/100 I have now.
4. Instead of the tank mounted coil hose I should have made a rear bumper quick disconnect and put the male end on the hose instead of having it screwed into the manifold. The hose sometimes gets in the way and has been pinched twice now.
5. I would also make the tank quick disconnect as there's times I don't need it in there and would be nice to be able to remove it. As it stands now, I need a couple wrenches and 10 minutes to take it out.

I couldn't be happier with my system. I have aired a 235/75R15 from off the bead to 44psi in around a minute. Donut spares take seconds. I really do need to redo the system with 1/2" hoses as the way it is I cannot run an air impact. Just not enough airflow.

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post #164 of 297 Old 01-17-2010, 09:13 PM
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You got any pictures of your system ? Sounds pretty close to what I was thinking about doing but putting disconnects on at the tank for easy removal.
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post #165 of 297 Old 01-17-2010, 09:18 PM
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I'll get some in the morning. Not really a lot to see, though. Just a big fat black hose coming off the compressor into the check valve, then a tool hose goes to the manifold. Then an orange 1/4" hose disappears under the firewall to the back.

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