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Old 10-08-2015, 12:35 PM   #1
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Smile Air hose connections vdc

2001 Newmar freightliner Help the old guy out. Do the hoses come off the vds elbow or the elbow come out of the box? I can't get enough play in a lock collar to loosen the connection.
Knowing where to attack ,I am sure is the key.
Thanks Will an almost mechanic I south west Idaho
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Old 10-08-2015, 01:05 PM   #2
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Quote:
Originally Posted by wllhyslop View Post
2001 Newmar freightliner Help the old guy out. Do the hoses come off the vds elbow or the elbow come out of the box? I can't get enough play in a lock collar to loosen the connection.
Knowing where to attack ,I am sure is the key.
Thanks Will an almost mechanic I south west Idaho
Have No Idea what you're talking about. I'd love to help if I knew.
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Old 10-08-2015, 04:08 PM   #3
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Well,
I too am a bit perplexed on what the heck was the last line in his statement but, in most cases, to release a "Push to release" type air fitting, you normally have to push on the hose towards the fitting. That releases pressure on the collar. You then push on the collar and that releases the "bite" the collar has on the hose, now you can remove the hose.

But, and this is a large "BUT", be prepared for some serious air pressure escapement when you back-out that hose, unless you drain that air system prior removing it.
Scott
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Old 10-08-2015, 04:10 PM   #4
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I am trying to remove the vds computer from under the bed and engine cover. The rear air gage is wondering high to low. The question is where do the red and green air lines disconnect? Do they drop out from the elbow or does the elbow pull out from the vds box? Thanks Will
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Old 10-08-2015, 04:18 PM   #5
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"vds" is Video Display System right?
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Old 10-08-2015, 04:19 PM   #6
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Will,
If you take a look at the link I'm posting, in the picture, does it look like the same kind of connections you have in your coach? If so, then doing it the way I explained above, SHOULD work. It may take the draining of the entire air system before the collars will be relieved enough to relax the bite on each air line.
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File Type: pdf Freightliner VDU Cold Solder Repair.pdf (328.4 KB, 65 views)
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Old 10-08-2015, 04:23 PM   #7
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"vds" is Video Display System right?
Mr_D,
He's referring to what's called the "VDC" or, Vehicle Data Computer. It was used in Freightliner chassis's prior to around mid '04 or so, when the replacement and newer version came in which is called the: MMDC or, Multi-Module-Data-Computer.

Both of which gather info from the engine ECM, the Transmission TCM, the ABS Module and, both primary and secondary air system inputs. Then, they interpret all that info, and send it to the dash gauges for you to read.

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Old 10-08-2015, 04:23 PM   #8
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Quote:
Originally Posted by wllhyslop View Post
I am trying to remove the vds computer from under the bed and engine cover. The rear air gage is wondering high to low. The question is where do the red and green air lines disconnect? Do they drop out from the elbow or does the elbow pull out from the vds box? Thanks Will
What is a "vds", or a "vds computer"?
(Wondering since even Google does not seem to know).
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Old 10-08-2015, 05:19 PM   #9
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OK the air hoses are off. Too many years with tractor hydraulic lines and air couplers. I had to understand that I was to pull out as a bare hose, with out a coupler .
Thanks for the input, it broke through the brain block. Been having more of those lately. Every one have a good evening Will
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Old 10-08-2015, 06:29 PM   #10
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OK the air hoses are off. Too many years with tractor hydraulic lines and air couplers. I had to understand that I was to pull out as a bare hose, with out a coupler .
Thanks for the input, it broke through the brain block. Been having more of those lately. Every one have a good evening Will

Hang in there Will, most of us on this forum are pretty decent and knowledgeable folks but, we are also mostly old dudes who don't do acronyms real well. We need lots of plain English.
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Old 10-08-2015, 08:26 PM   #11
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I recently had to replace both the rear air gauge and the VDC unit, it was not registering and the VDC was leaking air, so it was replaced not a cheap repair.
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Old 10-08-2015, 10:23 PM   #12
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What is a "vds", or a "vds computer"?
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Mel: The VDC (Vehicle Data Computer) or VDU was used on Freightliner chassis from about 99-2004 to provide information to the gauges and the display in the dash. There were a lot of erratic gauge malfunctions attributed to the VDC/VDU connections.

Discussion here: http://www.discoveryowners.com/vdcrepair.pdf
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Old 10-09-2015, 01:07 AM   #13
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Mel: The VDC (Vehicle Data Computer) or VDU was used on Freightliner chassis from about 99-2004 to provide information to the gauges and the display in the dash. There were a lot of erratic gauge malfunctions attributed to the VDC/VDU connections.

Discussion here: http://www.discoveryowners.com/vdcrepair.pdf
Yeah
I tried to explain that earlier on this thread.
Scott
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Old 10-09-2015, 08:41 AM   #14
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Yeah
I tried to explain that earlier on this thread.
Scott
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Thanks for that!
Apparently you posted that answer as I was composing my "what is a VDS or a VDS computer" question.
By the way, UAAOC, (Unfamiliar Acronyms Are Often Confusing), to me
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