| 1973-74 Refer vents [message #254342] |
Fri, 04 July 2014 10:06  |
bryant374
Messages: 563
Registered: May 2004
Location: Pleasant Valley, NY 12569
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This subject had "drifted" to air horns so, here it is back with some clarifications & comments.
The reason there were no refer vents (roof & side) on the 1973 early 74s was that the GMC Engineer in charge of that responsibility forgot. That Engineer was John Locklin who had much going on at that time and it just plain slipped by. How do I know that, John told me so. You may also note that the preproduction vehicles had vents and the early production MHs had body framing for the vents but they were not installed.
The early refers were primarily 12/120V so this probably caused less of a problem than absorption type would have.
The Dealer Service Technical Bulletin 75-TM-9 (link below) was to be implemented if the customer complained about refer performance.
http://www.gmcmhphotos.com/photos/miscellaneous-bryant-stuff/p55165-1-75-tm-9-service-bul.html
Note the baffles in the design link below. They allow 1" free space between the baffle and coils for air flow. My guess is that many of the baffles are likely missing with the replacement of reefers and contribute to their performance.
http://www.gmcmhphotos.com/photos/miscellaneous-bryant-stuff/p43274-refrigerator-venting.html
Bill Bryant
PO 1976~PB (owned 34 years)
1914 Ford (owned 70 years)
1965 Corvette (owned 39 years)
GMC Motorhome History
[Updated on: Fri, 04 July 2014 10:13] Report message to a moderator |
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