| [GMCnet] Complete engine vacuum diagram for 1978 403? [message #337955] |
Wed, 17 October 2018 16:25  |
Dave Stragand
Messages: 307
Registered: October 2017
Karma: 0
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Senior Member |
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Hi All,
Does anyone have a complete diagram of the vacuum hoses on a 1978 403? A
previous owner has disconnected and/or removed most of the vacuum lines
on my coach, so I'd like to put it back to original (including a TVS
valve, and the vacuum control valve and solenoid valve if they are also
good to have).
I have seen several partial diagrams in the maintenance manual, but have
not seen anything that includes all of the carb and manifold vacuum
ports, and that also includes items such as the HVAC's vacuum line, the
snorkel heat valve, and the trans kickdown. Does a complete diagram
showing 'what goes where' exist?
Thanks,
-Dave
1978 Transmode near Pittsburgh
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1978 Transmode (403)
Pittsburgh, PA
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| Re: [GMCnet] Complete engine vacuum diagram for 1978 403? [message #337956 is a reply to message #337955] |
Wed, 17 October 2018 17:12  |
powwerjon
Messages: 849
Registered: March 2013
Karma: -2
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Senior Member |
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David,
See if this meets your needs. This is the California layout but is simular with a few extras.
http://www.gmcmhphotos.com/photos/carbon-or-vapor-canister/p58051-carbon-canister-vac-77-2f-78-gmc.html
JR Wright
78 Buskirk Stretch
Michigan
> On Oct 17, 2018, at 5:25 PM, Dave Stragand wrote:
>
> Hi All,
>
>
>
> Does anyone have a complete diagram of the vacuum hoses on a 1978 403? A
> previous owner has disconnected and/or removed most of the vacuum lines
> on my coach, so I'd like to put it back to original (including a TVS
> valve, and the vacuum control valve and solenoid valve if they are also
> good to have).
>
>
>
> I have seen several partial diagrams in the maintenance manual, but have
> not seen anything that includes all of the carb and manifold vacuum
> ports, and that also includes items such as the HVAC's vacuum line, the
> snorkel heat valve, and the trans kickdown. Does a complete diagram
> showing 'what goes where' exist?
>
>
>
> Thanks,
>
>
>
> -Dave
>
> 1978 Transmode near Pittsburgh
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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| Re: [GMCnet] Complete engine vacuum diagram for 1978 403? [message #337961 is a reply to message #337956] |
Wed, 17 October 2018 20:45 |
Dolph Santorine
Messages: 1236
Registered: April 2011
Location: Wheeling, WV
Karma: -41
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Senior Member |
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Dave
Original TVS are likely inoperative.
Be suspect of new ones and NOS.
Dolph Santorine
DE AD0LF
Wheeling, West Virginia
1977 ex-Palm Beach TZE167V100820
1-ton, Sullybuilt Bags, Reaction Arms, Manny Transmission, EV-6010,
> On Oct 17, 2018, at 6:12 PM, John Wright wrote:
>
> David,
> See if this meets your needs. This is the California layout but is simular with a few extras.
>
> http://www.gmcmhphotos.com/photos/carbon-or-vapor-canister/p58051-carbon-canister-vac-77-2f-78-gmc.html
>
> JR Wright
> 78 Buskirk Stretch
> Michigan
>> On Oct 17, 2018, at 5:25 PM, Dave Stragand wrote:
>>
>> Hi All,
>>
>>
>>
>> Does anyone have a complete diagram of the vacuum hoses on a 1978 403? A
>> previous owner has disconnected and/or removed most of the vacuum lines
>> on my coach, so I'd like to put it back to original (including a TVS
>> valve, and the vacuum control valve and solenoid valve if they are also
>> good to have).
>>
>>
>>
>> I have seen several partial diagrams in the maintenance manual, but have
>> not seen anything that includes all of the carb and manifold vacuum
>> ports, and that also includes items such as the HVAC's vacuum line, the
>> snorkel heat valve, and the trans kickdown. Does a complete diagram
>> showing 'what goes where' exist?
>>
>>
>>
>> Thanks,
>>
>>
>>
>> -Dave
>>
>> 1978 Transmode near Pittsburgh
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
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