Vacuum Pump Question
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Vacuum Pump Question
Hey all,
I tried searching first. Seems my electric vacuum pump 6C3Z-2A451-BA is worn out on my '99 7.3. Vac motor runs fine but diaphram doesn't pull strong enough. I pulled the pump intake tube off the reservoir tank (isolating the pump) and plugged it with my finger and it couldn't pull strong enough to engage the cutoff switch. When I put vacuum to the switch using a different vac pump, it switched off and on fine. So I'm guessing the seals in the piston/diaphram are worn? A couple questions:
1) Are these pumps rebuildable? It seems all I need is the diaphram seal but I haven't been able to find any info on rebuild kits or seals. The reason I ask is I see some of the aftermarkets are labeled "reman" so I figure they might be rebuidable.
2) If I am buying new, I've heard nightmares about aftermarket replacements of these pumps. Anyone had this? Anyone know of an aftermarket that is decent?
Thanks
Jeff
I tried searching first. Seems my electric vacuum pump 6C3Z-2A451-BA is worn out on my '99 7.3. Vac motor runs fine but diaphram doesn't pull strong enough. I pulled the pump intake tube off the reservoir tank (isolating the pump) and plugged it with my finger and it couldn't pull strong enough to engage the cutoff switch. When I put vacuum to the switch using a different vac pump, it switched off and on fine. So I'm guessing the seals in the piston/diaphram are worn? A couple questions:
1) Are these pumps rebuildable? It seems all I need is the diaphram seal but I haven't been able to find any info on rebuild kits or seals. The reason I ask is I see some of the aftermarkets are labeled "reman" so I figure they might be rebuidable.
2) If I am buying new, I've heard nightmares about aftermarket replacements of these pumps. Anyone had this? Anyone know of an aftermarket that is decent?
Thanks
Jeff
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Joined: Oct 2008
Posts: 1,080
Likes: 10
Hey all, I tried searching first. Seems my electric vacuum pump 6C3Z-2A451-BA is worn out on my '99 7.3. Vac motor runs fine but diaphram doesn't pull strong enough. I pulled the pump intake tube off the reservoir tank (isolating the pump) and plugged it with my finger and it couldn't pull strong enough to engage the cutoff switch. When I put vacuum to the switch using a different vac pump, it switched off and on fine. So I'm guessing the seals in the piston/diaphram are worn? A couple questions:
1) Are these pumps rebuildable? It seems all I need is the diaphram seal but I haven't been able to find any info on rebuild kits or seals. The reason I ask is I see some of the aftermarkets are labeled "reman" so I figure they might be rebuidable.
2) If I am buying new, I've heard nightmares about aftermarket replacements of these pumps. Anyone had this? Anyone know of an aftermarket that is decent?
Thanks
Jeff
1) Are these pumps rebuildable? It seems all I need is the diaphram seal but I haven't been able to find any info on rebuild kits or seals. The reason I ask is I see some of the aftermarkets are labeled "reman" so I figure they might be rebuidable.
2) If I am buying new, I've heard nightmares about aftermarket replacements of these pumps. Anyone had this? Anyone know of an aftermarket that is decent?
Thanks
Jeff
However, the Vacuum Pulse Module (VPM) may have an issue. Or, a leak somewhere in the circuit.
No, to my knowledge they are not re-buildable.
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Sound like your pump. If it doesn't maintain 15 Hg" it's not going to do its job.
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thanks for the help! Anyone else have experience with aftermarket pumps?
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I have a medium vacuum leak that makes the pump on all the time.
To lazy to find it
Maybe someone will correct me but as long as you have hydroboost brakes the pump breaking is no big deal.
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That's correct. Uses the Power Steering System for Hydraulics. The previous years had a Vacuum pump mounted specifically for the PS.
Hotshot
Joined: Mar 2014
Posts: 10,750
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From: Douglassville, PA
I only had it for a year BUT it probably gets 5 years worth of usage during that time.
I have a medium vacuum leak that makes the pump on all the time.
To lazy to find it
Maybe someone will correct me but as long as you have hydroboost brakes the pump breaking is no big deal.
I have a medium vacuum leak that makes the pump on all the time.
To lazy to find it
Maybe someone will correct me but as long as you have hydroboost brakes the pump breaking is no big deal.
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Joined: Jan 2012
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99 vacuum pump died :(
I replaced the vacuum pump & the 4x4 switch beside it as I was told of internal leaks causing problems , everything is working fine now , nice cold AC from my dash needed here in FL.
PROBLEM :the new pump never shuts off !!!
I have plugged both lines to the front hubs
plugged the line going to the dash , the only time the pump shuts off is if I put my finger over the suction on the pump , any ideas guys , pulling my hair out
PROBLEM :the new pump never shuts off !!!
I have plugged both lines to the front hubs
plugged the line going to the dash , the only time the pump shuts off is if I put my finger over the suction on the pump , any ideas guys , pulling my hair out
Hotshot
Joined: Mar 2014
Posts: 10,750
Likes: 1,065
From: Douglassville, PA
I replaced the vacuum pump & the 4x4 switch beside it as I was told of internal leaks causing problems , everything is working fine now , nice cold AC from my dash needed here in FL.
PROBLEM :the new pump never shuts off !!!
I have plugged both lines to the front hubs
plugged the line going to the dash , the only time the pump shuts off is if I put my finger over the suction on the pump , any ideas guys , pulling my hair out
PROBLEM :the new pump never shuts off !!!
I have plugged both lines to the front hubs
plugged the line going to the dash , the only time the pump shuts off is if I put my finger over the suction on the pump , any ideas guys , pulling my hair out
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Joined: Jan 2012
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