Jim,
This is from my writeup on my Web page of my
experience finding one of these pumps. Hope it helps.
"What you want is typically located UNDER the fender
well in front of the left front tire and right behind the grille. I
finally found one on a 1982 Pontiac J2000.
Look also for two 3/8" vacuum hoses running together
(typically taped) from behind the left headlight area, along
the top of the left fender, around and to the brake vacuum
booster assembly. When you've found those hoses,
you've found the pump you want.
As mounted in the car, the pump assembly should be
covered on the bottom with a removable body filler panel.
The panel protects the assembly from road schmutz.
When you are looking, try to find one with this panel intact.
I found several that were exposed without the panel.
Looked pretty bad. I'd avoid one of those.
Tools Required:
Pocket knife/utility knife to cut tape wrapped around
hoses and possibly hose (makes them easier to remove)
Wire cutters/stripper to cut/strip wires
3/8" and 9/16" sockets with extension/ratchet
Source of 12VDC for testing
Removal of Pump Assembly from Junkyard Vehicle
NOTE: Always wear eye protection, especially when
working under the front of the car. Be aware that when you
loosen/remove the plastic panel under the pump
assembly, there is going to be a lot of drek that will fall
out. Protect your eyes.
1. Find the hoses, and note their routing. Make a small
diagram to help your memory later.
2.Cut the tape holding the hoses together, being careful
not to damage the hoses.
3.The shorter of the two hoses tees into a 3/8" x 3/8" X
1/8" tee and continues on to the brake booster reservoir.
The tee branches to the pressure switch mounted to the
master cylinder stud. Pull the hose off the near end of the
tee.
4.The longer hose runs to the filter (about 1-1/2" inch
diameter) mounted in-line, and then on to an intake
manifold vacuum port. Pull the hose off the near end of the
filter assembly.
5.Check for and remove any other mounting fixtures
(tape, wire ties, etc.) to completely free the hoses along
the fender routing up to the place where they go through
the front opening.
6.With the 9/16" socket, remove the pressure switch
bracket from the master cylinder mounting stud (if so
mounted).
7.Cut the three wires (brown, brown, black) as far back
near or into the wiring harness as you can. Leave as
much wire (6" or more attached to the switch) as you can
get to.
8.Pull the vacuum hose out of the brake booster. Remove
the grommet in the booster if you want to take it with you.
Press the grommet back on to the nylon fitting to keep
track of it.
9.Remove the hose/tee/vacuum switch.
10.Pull the other hose off the manifold vacuum port. Some
installations may be hard to get to especially if the hose is
attached with a clamp. Cut the hose if necessary, as it can
be easily replaced. Remove the hose/filter assembly.
11.With the 3/8" socket, remove the small bolts attaching
the body panel and set it aside.
12. Locate the electrical connection to the pump
assembly. You will find three wires (red, black/white
stripe, black). These wires will run to another harness. Cut
the wires as far up into the harness as you feel
comfortable with. The longer the wires you have to work
with, the better. Alternatively, pull the connector off the
pump, and then pull it out from the top. Find wires going
into harness and cut them there.
13.The pump mounting bracket is attached with three
small bolts in the bottom of the battery box. (Remove the
battery if one is in there.) With the 3/8" socket, remove the
three mounting bolts attaching the pump assembly and
the mounting bracket. The pump is not heavy, but support
it as best you can when it comes loose -- either keep
some tension on hoses as it drops or whatever works. Be
sure to keep the mounting bolts. You want to keep as
much of this hardware as you can for reattachment later in
your application.
14.The alternative disassembly is to remove the pump
assembly from the bracket from below, and then remove
bracket.
15. To keep everything together, reassemble all the
hoses and other components, and reattach the pump to
the mounting bracket if disassembled in 14. Replace the
mounting bolts in the bracket holes. Refer to your drawing
when memory fails.
16.Coil it all up and you're on your way."
Toby Maki
'73 Glacier 230
From: slwjmw (jim wagner)
Date sent: Tue, 1 Aug 2000 11:08:17 -0400 (EDT)
To: gmcmotorhome
Subject: GMC: Vacuum Pump Location
Send reply to: gmcmotorhome
> I located a 82 Citation in a salvage yard. I looked for the auxiliary
> vacuum pump for the brake booster and was unable to locate it. Could
> someone tell me the pump's location. Does it go directly to the brake
> booster?
> Thanks
> The other Jim 76GB 500Cad
>
This is from my writeup on my Web page of my
experience finding one of these pumps. Hope it helps.
"What you want is typically located UNDER the fender
well in front of the left front tire and right behind the grille. I
finally found one on a 1982 Pontiac J2000.
Look also for two 3/8" vacuum hoses running together
(typically taped) from behind the left headlight area, along
the top of the left fender, around and to the brake vacuum
booster assembly. When you've found those hoses,
you've found the pump you want.
As mounted in the car, the pump assembly should be
covered on the bottom with a removable body filler panel.
The panel protects the assembly from road schmutz.
When you are looking, try to find one with this panel intact.
I found several that were exposed without the panel.
Looked pretty bad. I'd avoid one of those.
Tools Required:
Pocket knife/utility knife to cut tape wrapped around
hoses and possibly hose (makes them easier to remove)
Wire cutters/stripper to cut/strip wires
3/8" and 9/16" sockets with extension/ratchet
Source of 12VDC for testing
Removal of Pump Assembly from Junkyard Vehicle
NOTE: Always wear eye protection, especially when
working under the front of the car. Be aware that when you
loosen/remove the plastic panel under the pump
assembly, there is going to be a lot of drek that will fall
out. Protect your eyes.
1. Find the hoses, and note their routing. Make a small
diagram to help your memory later.
2.Cut the tape holding the hoses together, being careful
not to damage the hoses.
3.The shorter of the two hoses tees into a 3/8" x 3/8" X
1/8" tee and continues on to the brake booster reservoir.
The tee branches to the pressure switch mounted to the
master cylinder stud. Pull the hose off the near end of the
tee.
4.The longer hose runs to the filter (about 1-1/2" inch
diameter) mounted in-line, and then on to an intake
manifold vacuum port. Pull the hose off the near end of the
filter assembly.
5.Check for and remove any other mounting fixtures
(tape, wire ties, etc.) to completely free the hoses along
the fender routing up to the place where they go through
the front opening.
6.With the 9/16" socket, remove the pressure switch
bracket from the master cylinder mounting stud (if so
mounted).
7.Cut the three wires (brown, brown, black) as far back
near or into the wiring harness as you can. Leave as
much wire (6" or more attached to the switch) as you can
get to.
8.Pull the vacuum hose out of the brake booster. Remove
the grommet in the booster if you want to take it with you.
Press the grommet back on to the nylon fitting to keep
track of it.
9.Remove the hose/tee/vacuum switch.
10.Pull the other hose off the manifold vacuum port. Some
installations may be hard to get to especially if the hose is
attached with a clamp. Cut the hose if necessary, as it can
be easily replaced. Remove the hose/filter assembly.
11.With the 3/8" socket, remove the small bolts attaching
the body panel and set it aside.
12. Locate the electrical connection to the pump
assembly. You will find three wires (red, black/white
stripe, black). These wires will run to another harness. Cut
the wires as far up into the harness as you feel
comfortable with. The longer the wires you have to work
with, the better. Alternatively, pull the connector off the
pump, and then pull it out from the top. Find wires going
into harness and cut them there.
13.The pump mounting bracket is attached with three
small bolts in the bottom of the battery box. (Remove the
battery if one is in there.) With the 3/8" socket, remove the
three mounting bolts attaching the pump assembly and
the mounting bracket. The pump is not heavy, but support
it as best you can when it comes loose -- either keep
some tension on hoses as it drops or whatever works. Be
sure to keep the mounting bolts. You want to keep as
much of this hardware as you can for reattachment later in
your application.
14.The alternative disassembly is to remove the pump
assembly from the bracket from below, and then remove
bracket.
15. To keep everything together, reassemble all the
hoses and other components, and reattach the pump to
the mounting bracket if disassembled in 14. Replace the
mounting bolts in the bracket holes. Refer to your drawing
when memory fails.
16.Coil it all up and you're on your way."
Toby Maki
'73 Glacier 230
From: slwjmw (jim wagner)
Date sent: Tue, 1 Aug 2000 11:08:17 -0400 (EDT)
To: gmcmotorhome
Subject: GMC: Vacuum Pump Location
Send reply to: gmcmotorhome
> I located a 82 Citation in a salvage yard. I looked for the auxiliary
> vacuum pump for the brake booster and was unable to locate it. Could
> someone tell me the pump's location. Does it go directly to the brake
> booster?
> Thanks
> The other Jim 76GB 500Cad
>
