Complete engine vacuum diagram for 1978 403?

[dave stragand1]

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

 

[powwerjon]

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

>
> 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

 

[adolph santorine]

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,

>
> 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

>>
>> 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