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| | | | Joined: May 2005 Posts: 14 Apprentice | | Apprentice Joined: May 2005 Posts: 14 | I have two of these vacuum assist pumps. One is a 12 volt model (used) and the other is a 6 volt model(new in box) They are made by Trico and I see them every once in a while on eBay. You put this in line with the vacuum going to your wipers or other vacuum accessories. When vacuum is low at high RPM's you flip the switch and the pump supplies additional vacuum to your accessories. | | | | | Joined: Aug 2006 Posts: 112 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2006 Posts: 112 | Why not put a vacumn switch on the manifold to switch it on automatically?
64 & 66 GMC long fleetside 4x4
Cartwright, OK
| | | | | Joined: Nov 2006 Posts: 247 'Bolter | | 'Bolter Joined: Nov 2006 Posts: 247 | We used to use these on our 1950's tank trucks and wrecker. It was an aftermarket kit that was installed to provide vacuum for your wipers when you were working the truck hard like pulling a pass and you had very little vacuum from your engine. It was almost a necessity here.
Jim
Last edited by J M; 03/13/2009 5:29 AM.
| | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | Was this any better than the double action fuel pump? | | | | | Joined: Nov 2006 Posts: 247 'Bolter | | 'Bolter Joined: Nov 2006 Posts: 247 | It had it beat hands down. The double action pump just wasn't strong enough. Sometimes we would run both.
Jim | | | | | Joined: Aug 2006 Posts: 20 Apprentice | | Apprentice Joined: Aug 2006 Posts: 20 | what is the part # on that 6 volt vacuum booster pump | | | | | Joined: Sep 2006 Posts: 3,596 'Bolter | | 'Bolter Joined: Sep 2006 Posts: 3,596 | GMC manual refers to it in section 23.3787 Part#2233295 | | |
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