Dear A.B.,
I found this 3d very interesting and helpful.
I am just about to fit a Sanden SD7H15 onto the engine of my truck and would like to know your advice as far as lubrication is concerned. Sanden do have their own oil reservoir. Will I need an "oiled air" inlet anyhow? And in this case, would it be possible to connect it directly to the drain plug of the oil filter on the outlet to get the oil "recirculated"?

Does anybody know the max rpm an airco compressor can be run at?

Thanks for the replies.

Ciao

Adriano

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adriano

Hello Adriano, Welcome to the HUBB.

The SD7 compressors I’ve seen in the past do not have an oil reservoir, nor does the York. It’s just that since the York is upright and the crankshaft is at the bottom just like a normal engine, the oil stays at the bottom. That’s not the case with the SD7 since it has 7 rotary pistons (as apposed to 2 in the York) and they are arranged sideways like a gun barrel when aiming. So in any case without periodic lubrication the top pistons will not get enough lubrication.

You don’t need a permanent oiled air intake. Just put some oil in every now and then and it will be fine. Don’t be afraid if you put more than needed, the excess will be thrown out and caught in the filter.

Yes, you can install an oil return hose from the filter to the compressor inlet but you can’t just leave it open. The compressor will create a constant high vacuum when operating and filters aren’t designed to handle such vacuum from this end for so long. So install a valve that you can open manually once the filter is filled. This is still a manual operation but easier and not as messy.

RPM? I’m not sure but at least it will run safely at 4000 RPM. Don’t worry about revving the engine more than that while driving since the compressor’s clutch will be disengaged and it can rotate freely faster than that. The clutch will only be engaged when pumping air and that’s not going to happen unless the vehicle is stationary. Are you going to fill the tires while moving?

The following link might be of help to you:

Sanden Service Manual
http://www.sanden.com/support/servic..._contents.html

Hope this helps.

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A.B.

OasisPhoto.com – Images from the Magical Sahara.
ShortWheelbase.com – Jeep preparations.

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A.B.
OasisPhoto.com – Images from the Magical Sahara.

Update/Correction: I just went through some of the info I saved from the web and other sources about the SD5 and SD7. They need more frequent lubrication than York. A source went as far as suggesting oiling it every time/day before use. So I guess you should install an inline oiler and forget about it. If you’re going to install a return hose from the filter, you’ll still need the valve.

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A.B.

OasisPhoto.com – Images from the Magical Sahara.
ShortWheelbase.com – Jeep preparations.

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A.B.
OasisPhoto.com – Images from the Magical Sahara.

Hello adri and A.B.,

I'm not sure about Sanden, but York compressors use any of these oils:

Mineral Oil, Zerol 150, Zerice S-68, P.O.E.Polyol Ester (P.O.E.) P.A.G.

Yorks can be fitted at plus/minus 45 deg. from vertical as the oil chamber is at the bottom. This does not prevent oil from getting into the outlet, so an oil separator will be required. I can't confirm this but I know a guy who maintains that an oil separator is redundant. Under desert driving conditions tyres won't last long anyway, hence deterioration of rubber through contact with oil is not a problem.

I have a separator, also to keep the air oil-free for other applications, like dusting off cameras. The trick with the separator is to use one that will withstand high temperatures (they are normally rated up to 50 deg. C). Here's a diagram of the installation: http://www.eh71.dial.pipex.com/publi...iondiagram.gif

More info about York lubrication here:
http://www.eh71.dial.pipex.com/public/yorkoillevels.pdf

As a matter of interest, I found a document describing how to avoid oil blow-by through the air outlet in York compressors (I haven't tried it yet but maybe someone has and could comment). The document is here: http://www.eh71.dial.pipex.com/publi...lblowbyfix.pdf


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Roman (UK)
www.overlandcruiser.info

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Roman (UK)

Yes, the York can even be mounted on its side, but the suction port has to be on top.

The filter/oil separator is a must using any compressor. If there’s no oil coming out of the compressor then it’s not properly lubricated. It should also be able to withstand the high output pressure of the compressor. I found out that fitting the filter directly after the compressor limits the flow and the compressor has to work longer to fill the tank. I plan to re-plumb the system so that the compressor pumps directly into the tank and install the filter on the outlet hose from the tank. Disadvantages? The system will need more oil since some of the oil will remain in the tank. No big deal in my book.

PS: I have the complete York service manual. If anybody need it let me know and I’ll post it on my site.


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A.B.

OasisPhoto.com – Images from the Magical Sahara.
ShortWheelbase.com – Jeep preparations.

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A.B.
OasisPhoto.com – Images from the Magical Sahara.

It's also here:
http://www.ccicompressor.com/docs/CCIsrvice.pdf



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Roman (UK)
www.overlandcruiser.info

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Roman (UK)

At the risk of resurrecting this one, I thought I'd add a little something.

I have just got a compressor from Matt Savage, and used it on a Ford Transit - and am very impressed.

I'm taking it out to Mauritania later this year, and I'll pass on how it performed (on Land Rover tyres in the heat) - in direct comparison with the Grand Erg I also have.

Sam.

Go Viair, great bit of kit...

Matt Savage, thanks!

Sam.

PowerTanks work a treat. You can also run air tools off them. We thought of using one for our London to Cape Town trip, but went with a compressor because of the uncertainty of being able to fill up the PowerTank. In reality probably wouldn't have needed to fill it up.

Used a Viair compressor with a 3 US gal tank. The compressor supplies air at 1.3cfm which fills the tank pretty quickly.

One thing I haven't seen mentioned here in regards to compressors is the duty cycle. If you exceed the duty cycle, you run the real risk of cooking the compressor. The Viair I had had a 33% duty cycle (20min of operation per hour). The ARB has a 15% duty cycle, and with a supply flow of less than 1cfm, it makes for long waits during reinflation. But if you have the patience, it works well.

cheers

Graham

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Graham 'Cracker'
Director: Overland Training
Editor: Overland Journal
Instigator: Africa Overland

Got to agree with Sam, the Viair works well.

I'm using a 2.6cfm Viair that I got from Matt Savage at the Land Rover Enthusiast show. Used it to inflate all four tyres from sand pressure (15psi or so) up to road pressure (40psi) crossing the Sahara this August (Nouadhibou to Nouakchott).

It didn't overheat, although I almost did, and did it pretty quickly. I didn't time it though, because it was too bloody hot to be faffing around!

It fits under the driver's seat of my old Rangie and the hose is long enough to reach all of the wheels without having to remove it from the vehicle.

It's a good bit of kit. You get what you pay for.

B

[This message has been edited by BenW (edited 14 December 2004).]

[This message has been edited by BenW (edited 14 December 2004).]

The viair looks like a good piece of kit. I currently have an ARB compressor mounted in the engine bay "buffered" with a 5 US Gal air tank mounted beside the chassis rails on the 110.

I used to run a Quikair2 but swapped it for the ARB (and converted the Quikair to a portable unit). While the ARB works, I don't think it moves the quantity of air or has the duty cycle I need to be comfortable.

Do you think the viair could fit in the 110s engine bay? Any particular model you guys recommend?

Are we at 100 posts yet?

Cheers,
Nick.

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Nick Taylor
www.exerro.com
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Vehicle Specs

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Nick Taylor, a Colorado Mack'em
blog | vehicles

Whilst the Viair could fit in a a 90/110 engine bay (although perhaps not with a V8), I'm not sure it's rugged enough to be in there (rain/diesel/mud/oil etc.). I do think it's a little 'pretty' for that. But bolt it in behind/under your front seats (or anywhere else inside), and I reckon it'll do you proud for years.

Sam.

Toby Savage (Matt's dad) has two Viairs mounted under the bonnet of his Carawagon. He mentioned them back near the start of this thread.

He's been away to the Sahara with it several times and had no problems - as I understand it.

Chris knows Toby's setup - Any problems that you know of Chris?

Ben

[This message has been edited by BenW (edited 14 December 2004).]

Not really - I think he has two in series (its in the Dez Driving film).

Basically Sam is right - the Erg has a whole lot of poke - good when others (like bikes) are relying on your pump or you have 900 16s - but a Viair will do nicely and is smaller.

And currently Matt is giving away a free bag of monkey nuts with every Viair he sells before Xmas (while stocks last).

Ch

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Morocco Overland 4 (2025) • Trans Morocco Trail

I know its not really applicable to desert driving, but if you use your vehicle for other things, I would think twice about mounting your compessor under the seat, as I did this with my twin tongue, and the first time I had to do some wading it filled the seat box and 1/2 submerged the comp, luckily it cleaned up OK and still works fine.

I`d mount it some where you know it is going to stay dry.

Just a thought

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An aussie escaped from london, now in Dubai.