Vacum pump on a Journey 36G

[colemole]

I have what appears to be a small electric vacum pump located on the front drivers side to the drivers side of the generator which appears to supply vacum to a small black approx. 4 inch globe located above the fuse and breaker box with a 1/4 inch rubber line running from the pump to the globe and then a very small wire or hose running from the globe through the firewall to somewhere under the dash. This small pump seems to be running all the time when the ignition is on and I hadn"t noticed it before.
Any one know what it is and should it run whenever the igniton is on?

Thanks Colemole

[grtharris]

This is the vacuum supply for the dash heater controls. More than likely you have a leak in one of the vacuum lines. Pinch the line leaving the pump and the pump should shut off. This will verity if it is the pump or a leak in heater system.

Note the pump will run all of the time above ~8,000 ft.

[tomsm]

Very common problem. Check this thread...

[MaverickBBD]

This tube splits just where it slides into the vacuum pump. You should be able to snip the end off and stop the leak.

[colemole]

Thanks Guys you were right on. Small hose 1 inch long was split where it entered valve for heater control. Replaced hose and we are as good as new. Better because I gained some understanding of the system.
I am amazed how effective this site is for useful information and the timely responses recieved.

Thanks again for your help.

[1ciderdog]

Thanks - On mine I could hear the vacuum pump running, took me a while to find where it was hidden. I pulled hoses along the way, covered the end with my finger and the pump would stop. I was thinking about pulling the dash to get to the back side of the heator control but saw the photos on the referenced by tomsm above. I went out and found the line not attached at the end. Porblem sovled - vacuum pump shuts off now.
Thanks
Bob Gilson