Engine/Transmission (1994 - 1998) Air compressor

[Wirenut]

Does anybody know where an air compressor mounts on a 12 valve engine? I have a reman. cummins air compressor for a B series engine, but I don't know where it mounts. I hope I can make this work.

 

[Reb.B]

i thought they mounted where the vacuum pump was(in place of), but not totally sure

 

[Wirenut]

Where exactly is that at? Thanks for the reply.

 

[Blair]

I'm not sure where that compressor would mount if at all. the vacuum pump mounts to the gear case on the lower left side and the power steering pump mounts to the back of it. There are many different gear cases for the different applications of Cummins motors.

 

[Matt S]

It goes in place of the power steering pump/vacuum pumps. Right underneath the fuel injection pump.

 

[Wirenut]

Ok, so I'm now open for suggestions. I know I'm not getting rid of the power steering pump. What all is the vacuum pump for? This compressor has a shaft sticking out one side and a receiver for like a spline shaft on the other. I take it that this thing needs to be mounted to the engine to get oil in the bottom end of the thing. I am determined to make this thing work so any help would be greatly appreciated. Here's a link to pics of the thing if you wanna see it. http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&category=6770&item=1875611206&rd=1

 

[illflem]

Never done it but an educated guess.

Assuming there's enough room for the compressor before you hit the wheelwell remove your vacuum pump and put the compressor in it's place. Easier to connect the PS pump to the compressor on a bench so it will have to be removed also. Looks like you will have to use the gear from the vacuum pump, if it's the correct one, on the compressor. I'm not familiar with this compressor in particular but other underhood ones I've messed with also require a pressure oil line to them. You might have to tap into the port on top of your oil filter housing and run a small tube over to the compressor. Buy an electric Ford vacuum pump for your vacuum needs. All the vacuum runs on your '97 is the cruise control servo and the climate controls, piece of cake for the electric pump.



Seems I recall others trying this but finding not enough room for the compressor. At least you got a deal on the compressor, they run over $1000 new.

 

[The patriot]

Kewl!

Do you know if it requires an external governor, or is it internal?

Just something to think about.

Eric

 

[tgbol]

If you try to run the air compressor with the stock power steering pump the reservior hits the motor mount. Most trucks such as F*rd use a small p/s pump driven off the back of the compressor with a remote reservior. If the compressor doesn't have it already you need a governor for it. It is actually an unloader that holds the intake valve open when it reaches the pressure 125 to 135 psi.

You will need to plumb oil and return, proper brackets, And most Cummins compressors are water cooled.

 

[csevers]

Adding to what tgbol said

Proper brackets are the other brackets that Suport the comp if you bolt that compressor to the front gear case and the front gear case alone it is heavy enough to crack the gear case It happens all the time on medium duty trucks the bracket bolts to the back flange of the comp by the p/s pump and to the engine skirt just above oil pan. An other ideal is you might want to measure the comp shaft from mounting flange to shaft end and measure the deapth of the gear case It is hard to gauge from the pics but it almost looks like the shaft might be to long and check to see if the tin front cover of the gear case has a bump in it toward the radiator for the clearance needed for the comp saft nut. These are the things that jump out at me. If everything fits right it will be very nice set up to have!!



Craig

 

[JohnMcIntyre]

My own experience relates to the 24v CTD but there may be similarities as far as trying to mount a Cummins air compressor on your 12v.



The installation would not be possible on a 24v because the same physical location/space where the Cummins air compressor would be mounted is already used by Dodge as an OEM heavy duty rear engine mount. I'm guessing that the same limitation goes for the 12v as well. When you check under the hood, does this hold true for the 12v as well?

 

[Blair]

The vacuum pump also runs the front diff so I don't know if the little ford vacuum pump will have enough to move the collar. That same little vacuum pump is used in the 03 Dodge. You could run an air compressor like the one for Firestone ride rites in a suction mode. We did that for a temp repair on a truck that the stock pump stopped working.

 

[tgbol]

With the use of a small vacuum reservior the F*rd pump works fine on a 4x4. It doesn't take much to move the CAD.

 

[Blair]

Find a dealer that does Brake installs on the Ford PS and they will have a couple kicking around you could get one real cheap.

 

[JWaters]

Make sure you use the support brackets!!! If you dont your gear case will crack!!, A dang air compressor is a pain on the 5. 9. Make sure it is a single cylinder compressor. It is hard to get to and you would be better off with a gasoline one mounted in the bed! We have 230 units with 5. 9's and air compressor on them. :--) :--) :--)

 

[tgbol]

"We have 230 units with 5. 9's and air compressor on them. "





What is the application that you have them in??

 

[JWaters]

School buses

 

[Wirenut]

Yeah it would be a real nice model to use but our bus has the hydralic brakes. It only figures.

 

[JWaters]

All of ours a spec'ed with air brakes, I like it that way so I try to make sure that is in the spec sheet.

 

[Wirenut]

Does anyone have any pics of one mounted up? Even if it is one that came stock on a bus or anything would help. I looked under the hood today and it doesn't look like its gonna be one of those "fun" jobs!