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Re: JC-4 Vacuum Pump?? [message #323865 is a reply to message #323858]

Thu, 14 September 2017 07:33

Larry

Messages: 2875
Registered: January 2004
Location: Menomonie, WI

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Senior Member

I have the Ford (Azure ?) vacuum pump as a backup for vacuum brakes. I did test it on a seldom traveled road near my home. Traveling at 60mph, in neutral with the key ON, engine off, as long as I do not pump the brakes rapidly, the pump keeps up with the vacuum needs for braking to a safe stop. Handling the lac of power steering is another matter. I have a vacuum switch on the booster that I can adjust up to 25 in/vac. I have it set at 21 in/vac with a control switch on the arm rest to my left. I only turn it on when the engine is not running and I need vacuum to move the coach....like when my motor went south and needed to back the coach off of the tilt bed of the wrecker. Also use it when launching my coach on to the elevating ramps that I use for raising the coach to do maintaince. One foot on gas, the other one brake so I don't roll off the end of the ramp takes the vacuum down to low numbers. Turn on the vacuum pump for instant brakes. Just what I do.

Larry

78 Royale w/500 Caddy
Menomonie, WI.

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[Message index]

		JC-4 Vacuum Pump?? By: rjw on Wed, 13 September 2017 21:08
		Re: [GMCnet] JC-4 Vacuum Pump?? By: k2gkk on Wed, 13 September 2017 21:36
		Re: [GMCnet] JC-4 Vacuum Pump?? By: Jerry Wheeler on Wed, 13 September 2017 22:24
		Re: [GMCnet] JC-4 Vacuum Pump?? By: rjw on Thu, 14 September 2017 06:11
		Re: [GMCnet] JC-4 Vacuum Pump?? By: USAussie on Thu, 14 September 2017 07:18
		Re: JC-4 Vacuum Pump?? By: Larry on Thu, 14 September 2017 07:33
		Re: JC-4 Vacuum Pump?? By: Hal StClair on Thu, 14 September 2017 11:31
		Re: JC-4 Vacuum Pump?? By: larry.whisler on Thu, 14 September 2017 16:30
		Re: [GMCnet] JC-4 Vacuum Pump?? By: Ken Henderson on Thu, 14 September 2017 17:55
		Re: [GMCnet] JC-4 Vacuum Pump?? By: johnd01 on Fri, 15 September 2017 00:32
		Re: [GMCnet] JC-4 Vacuum Pump?? By: Ken Henderson on Fri, 15 September 2017 06:10
		Re: [GMCnet] JC-4 Vacuum Pump?? By: GatsbysCruise on Sun, 23 May 2021 12:18
		Re: JC-4 Vacuum Pump?? By: jhbridges on Thu, 14 September 2017 17:12
		Re: JC-4 Vacuum Pump?? By: RF_Burns on Sun, 23 May 2021 13:45
		Re: JC-4 Vacuum Pump?? By: rjw on Sun, 23 May 2021 14:43
		Re: JC-4 Vacuum Pump?? By: RF_Burns on Sun, 23 May 2021 21:01
		Re: JC-4 Vacuum Pump?? By: rjw on Mon, 24 May 2021 06:05

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