4BT Vacuum pump/brakes

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Aug 6, 2013
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Omaha, NE
Hey all thought I could get some recommendations.

I have a FJ40 4bt conversion and I am trying to fix what the PO has either cheeped out on or didnt do.

What would yall recommend for a the brakes....from what I have researched I have three options.

"There are 3 different options that you have for needing a vaccum.
1) Convert to GM hydroboost like I did in my 60. Great braking power and no need for vaccum.
2) Install an electric vacuum pump. Kind of noisy when ignition is turned on but not noticeable when engine is running and does the job.
3) Run a powersteering pump and vacuum pump off of a 6BT. Best setup so far but spendy. A lot of 4BT's do not come with power steering so this may be the ideal choice for those motors."


Which would yall prefer? Im already a tad over budget for all this so honestly as long as it will work Ill take it!

Also if you think vac....mind pointing me in the direction of which one.....I already have PS....so dont need both. I think I can just use one off a 91-94 5.9....not 100% though.
 
I think you might have issues with steering and motor mount with the factory set up 6bt. There is a different too in the earlier versions- Those might have issues as it was changed for some reason.
Audi/VW has some electric vacuum pumps referenced on 4BTswaps.com. You might find a lot more info there if you search. A reservoir tank and switch is probably necessary too unless you source a complete set up. The complete kits are all over if you do a search but they are around $3-500...
 
I have the 6bt style vac/hydraulic pump set up on my 4bt and it works great. The cheapest route would probably be to go with a junk yard hydroboost set up from and old Chevy Astro van (or similar vehicle).
 
I have the 6bt style vac/hydraulic pump set up on my 4bt and it works great. The cheapest route would probably be to go with a junk yard hydroboost set up from and old Chevy Astro van (or similar vehicle).

Davegonz, do you have pictures of your rig and of the steering pump set up somewhere?
 
I have the 6bt style vac/hydraulic pump set up on my 4bt and it works great. The cheapest route would probably be to go with a junk yard hydroboost set up from and old Chevy Astro van (or similar vehicle).

Alright.....thanks for the info. I honestly dont know much about hydroboost, but if it comes to that, I guess I will have to get smart.

I think you might have issues with steering and motor mount with the factory set up 6bt. There is a different too in the earlier versions- Those might have issues as it was changed for some reason.
Audi/VW has some electric vacuum pumps referenced on 4BTswaps.com. You might find a lot more info there if you search. A reservoir tank and switch is probably necessary too unless you source a complete set up. The complete kits are all over if you do a search but they are around $3-500...

Are you talking about space wise issues? I tried the website...but do to being out in Afghanistan, my IP is blocked out here...so it a no go; I have to rely on yall! lol


Do you think that one of these would work?
http://www.ebay.com/itm/03-05-Dodge...Parts_Accessories&hash=item3f206023d0&vxp=mtr

or

http://www.ebay.com/itm/Vacuum-power-steering-pump-combo-97-02-dodge-cummins-/161096087893




I really do appreciate the help!!!
 
I would avoid going electrical and stick with a dependable powersteering/vac setup or hydroboost setup.

Have you checked out eBay for used Cummins powersteering/vac pumps?

http://www.ebay.com/bhp/cummins-power-steering-pump

m7Itbzx8cCnzZrTko26aScQ.jpg



PM The Phoenician here on MUD. He might be of help with the IP access to 4BTswaps.com.
 
LC2013
In regards to accessing 4btswaps from Afghanistan.
When I was in Iraq I wasn't able to access 4btswaps or IH8MUD on the NIPR computers because they are blocked, I could only do it via the MWR internet or my own personal internet line that I paid for through the local base retailers. It may be harder for you if you're on a FOB.

As far as your brake issues, I second Davegonz's opinion, avoid electrical, stick to mechanical as much as you can. I got a Cummins powersteering pump like the one pictured above, but the installer had to modify the reservoir because the p pump was in the way. Is your 4bt rotary or an inline pump?
 
Use the above setup. I have it and love the simplicity... Rebuild kit for the Vacuum pump is under $50 and comes with the tools.. Here is a pic prior to install a couple years ago..

image-2512506520.jpg


image-1794063832.jpg
 
I would avoid going electrical and stick with a dependable powersteering/vac setup or hydroboost setup.

Have you checked out eBay for used Cummins powersteering/vac pumps?

http://www.ebay.com/bhp/cummins-power-steering-pump




PM The Phoenician here on MUD. He might be of help with the IP access to 4BTswaps.com.

Rgr....so the 5.9 vac/PS combo will work; only problem is it looks like it take up a good chunk of room in an already crowded bay. If thats the only venue then it will have to work.


Would something like this work?

http://www.ebay.com/itm/USED-Vacuum...Parts_Accessories&hash=item1e7b6a04ef&vxp=mtr

LC2013
In regards to accessing 4btswaps from Afghanistan.
When I was in Iraq I wasn't able to access 4btswaps or IH8MUD on the NIPR computers because they are blocked, I could only do it via the MWR internet or my own personal internet line that I paid for through the local base retailers. It may be harder for you if you're on a FOB.

As far as your brake issues, I second Davegonz's opinion, avoid electrical, stick to mechanical as much as you can. I got a Cummins powersteering pump like the one pictured above, but the installer had to modify the reservoir because the p pump was in the way. Is your 4bt rotary or an inline pump?

Yea...the IP is even banned on the MWR/the internet I pay for, but its banned on the website, not my side. Not a huge deal I have less that two weeks left here anyways, so no complaints.

Check....I would love the pump option, just want to make sure before I purchase it will work. Mine is a p-pump so going to have the same issue.

Use the above setup. I have it and love the simplicity... Rebuild kit for the Vacuum pump is under $50 and comes with the tools.. Here is a pic prior to install a couple years ago..

Rgr....are you talking about the 5.9 vac/PS combo? Thanks for the pic.


Again all, thanks for all the help!
 
The latter might work but your pulley set up may not allow you the same configuration. There are a bunch of different ways they get the serpentine to run all the accessories. You might just have to start looking under hoods. Afghanistan probably doesn't have many Dodge diesels running around, does it?
 
The latter might work but your pulley set up may not allow you the same configuration. There are a bunch of different ways they get the serpentine to run all the accessories. You might just have to start looking under hoods. Afghanistan probably doesn't have many Dodge diesels running around, does it?

Check, Ill have to get with the guy thats looking at the engine for me to see what he wants to do wit the belts.

I havent seen any yet.....ALOT fo Defenders...and a few 250 super duties though.

Is there a different version of the vac/hyd pump out there? I saw one in this thread that looked like it was considerably smaller. Check it out.
http://www.dieseltruckresource.com/dev/showthread.php?t=165546

Is it this one?

http://www.ebay.com/itm/DODGE-RAM-C...Parts_Accessories&hash=item3383ea46b9&vxp=mtr


Just saw it when I was looking at the others on ebay.....if it would work I dont know though.
 
Mine isn't up and running yet.. but I'm going to be using one of these (on a b3.3).

http://s291.photobucket.com/user/khnb7f/media/DSC02580.jpg.htmlhttp://i291.photobucket.com/albums/ll294/khnb7f/DSC02580.jpg

Alternator/Vacuum pump combo. That's a 60a Denso unit (what comes on the B3.3) next to it for size. This one is for a forklift application.


I like the alternator/vacc setup, just need something that wont take up anymore room than it has to.

I think those looks about prefect....guess Ill order one and get to work then! :D

1 Cardone Vacuum Pump Part Number: 1815-07005185
Notes: Vacuum Pump --



I appreciate the help!
 
Any more info on that Alternator? Amps? Part numbers?


I'm looking for an upgrade to my Isuzu 70A alternator with vac pump.

The picture is a Mitsubishi 32B68-00200 (Here's one w/o vacuum pump http://www.ebay.com/itm/Mitsubishi-24V-35-Amp-Alternator-32B68-00200-/161022946517 )

It says 35A on the alt. It's also twice as big as the Denso that says 60A. Pretty sure the 35A is rated at 100% duty cycle. It will be enough for my needs. It's also 24V which may work out good for some people. I am told you can swap the regulator for a 12V one from a Mitsubishi car.

Here's different one http://www.ebay.com/itm/Alternator-...Parts_Accessories&hash=item519ccfeb1a&vxp=mtr
 
If the only thing you need vacuum for is brakes I would recommend hydroboost as it eliminates the need for vacuum and improves braking performance.
 

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