Vacuum cannister????
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Cross-Country
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From: Vassar Mi
Vacuum cannister????
Hi guys I’m resroring my 76 highboy i’ve Owned since new. I’m finally nearing the end but I said that 2 years ago. Forgive me for not being as knowledgeable about mechanics as most of you are. This forum has been extremely helpful even though I haven’t asked a lot of questions I do keep up with it every few days and learned about topics I knew I would be working on soon. My original cab was a no a/c cab unfortunately it was beyond repair. Bought a cab from Texas (78 or 79) that had a/c. My buddy who bleeds Ford blue who has been helping me said I’m missing the vacuum cannister that will allow me to move the heater controls by vacuum. Looks like a soup can. Cannot find one. My question is did Ford use something else in 78 or 79 for vacuum that doesn’t resemble a soup can?
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From: Stanley, VA
The small metal "soup can" reservoir mounted on the driver's side splash pan (not to be confused with the large metal vacuum reservoir mounted near the passenger side battery. That one's emission related) was used on the earlier trucks. It was replaced by a plastic "ball" shaped reservoir on later models.
The metal version was used from '73-75. That was P/N D0DZ-19A566-A. The '76-78 version (before S/N AJ0.001) used P/N D6TZ-19A566-A and the last version, used '78-'79 from S/N AJ0,001) was P/N D7OZ-19A566-A.
Functionally, the three P/N's are interchangeable.
The metal version was used from '73-75. That was P/N D0DZ-19A566-A. The '76-78 version (before S/N AJ0.001) used P/N D6TZ-19A566-A and the last version, used '78-'79 from S/N AJ0,001) was P/N D7OZ-19A566-A.
Functionally, the three P/N's are interchangeable.
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Cross-Country
Joined: Jan 2015
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From: Vassar Mi
Vacuum cannister
Thanks for the info MikeoOo
that really helps. I noticed some under hood photos and saw that ball like cannister and wondered if they did away with the (soup can). They obviously did. Now on the search to find one. JY's in Michigan have no dent sides and if they do very little to salvage.Thanks again for the part #s
that really helps. I noticed some under hood photos and saw that ball like cannister and wondered if they did away with the (soup can). They obviously did. Now on the search to find one. JY's in Michigan have no dent sides and if they do very little to salvage.Thanks again for the part #s
Lead Driver
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From: San Jose, CA
My '79 came with the small soup can on the driver side, so they were being used on at least some models up to and including '79.
A/C truck, CA emissions, F350 non-catalyst, no cruise, 4wd, 400 engine. In case the specifications and parts use changes.
I remember seeing the round plastic one on a friend's heavy-duty '76 2wd F250 w/460, A/C and (I think) speed control. It had lots of bells-n-whistles like a Camper Special, but did not have the extended wheelbase and side-mounted spare, so was probably just a well outfitted 250.
Paul
A/C truck, CA emissions, F350 non-catalyst, no cruise, 4wd, 400 engine. In case the specifications and parts use changes.
I remember seeing the round plastic one on a friend's heavy-duty '76 2wd F250 w/460, A/C and (I think) speed control. It had lots of bells-n-whistles like a Camper Special, but did not have the extended wheelbase and side-mounted spare, so was probably just a well outfitted 250.
Paul
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From: Stanley, VA
You're mostly right. Trucks with straight heat or trucks with high output heater used manual controls, no vacuum needed. "However" Starting in '76 Ford had an option that was listed as "Hi/Lo Vent system. This was basically the factory integral A/C without the A/C part. It included the dash vents and that huge evaporator housing under the hood (minus the evaporator). It only contained the blower and the heater core. It also used the vacuum switched controls so it had a vacuum reservoir.
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Lead Driver
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From: San Jose, CA
Was the HO heater available with A/C?
My friend with the HD 250 had two '70's Fords over the years (both nice ones!) and I remember one of them had that label on the dash. But don't remember looking to see if it also had A/C.
Paul
My friend with the HD 250 had two '70's Fords over the years (both nice ones!) and I remember one of them had that label on the dash. But don't remember looking to see if it also had A/C.
Paul
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From: Stanley, VA
Although you could order the high output heater then have dealer installed A/C added.
More Turbo
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The nipple broke on my coffee can.I found this to replace it on ebay.
https://www.ebay.com/itm/Vacuum-Rese...72.m2749.l2649
https://www.ebay.com/itm/Vacuum-Rese...72.m2749.l2649
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From: Albuquerque
Lead Driver
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From: San Jose, CA
Certainly possible, but luckily I've never had any, nor has anyone I know ever had a problem with the cans, or their fittings. Even when I suspected a vacuum leak, it was never in one of the cans or their fittings.
Vacuum hoses deteriorate over time certainly, but no more so here than on any other component. Maybe a bigger problem in cold climates where the plastic can deteriorate, or wet climates where the metal cans can rust. Always made sure to keep mine painted too to avoid rust starting around the seams.
It's just a system reservoir to remove any effect that the constant changes in vacuum produced by the engine have on the function of whatever part is attached to the reservoir(s). Just like a brake booster is a reservoir for the power brakes, these are just for whatever else. Including the HVAC controls (where so equipped), emissions devices (when so equipped) and "stuff" like that.
Interesting that they call it the EGR vacuum reservoir in that advertisement for the big can. Never heard them called that, but it makes sense.
Paul
Vacuum hoses deteriorate over time certainly, but no more so here than on any other component. Maybe a bigger problem in cold climates where the plastic can deteriorate, or wet climates where the metal cans can rust. Always made sure to keep mine painted too to avoid rust starting around the seams.
It's just a system reservoir to remove any effect that the constant changes in vacuum produced by the engine have on the function of whatever part is attached to the reservoir(s). Just like a brake booster is a reservoir for the power brakes, these are just for whatever else. Including the HVAC controls (where so equipped), emissions devices (when so equipped) and "stuff" like that.
Interesting that they call it the EGR vacuum reservoir in that advertisement for the big can. Never heard them called that, but it makes sense.
Paul
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From: Albuquerque
The can and ball i"m talking about simply stores vacuum to operate the HVAC control motors when vaccum is low or the engine is not running. Not the same as for brakes or some emmissions equipment.
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