Hello
I have a MCI 102dl3 with a Detroit Series 60 12.7. I am looking for Jake Brakes. I was told that I need Jakes 790B for my engine. However, they are very hard to find. I continue to see 765A, 797B, even 790A. My question is, will any of these other Jakes for a 12.7 work?
Bus engines used the 760b,765,765A,770 and 790 only difference is the bus model Jakes are less aggressive than the 12.7 truck models and some housing cover more valves ? are you installing a 1/2 set or raising the floor for a full set on your DL
I'm planing on installing a full set and raising the floor for the taller valve covers.
Quote from: luvrbus on January 09, 2021, 04:28:07 PM
Bus engines used the 760b,765,765A,770 and 790 only difference is the bus model Jakes are less aggressive than the 12.7 truck models and some housing cover more valves ? are you installing a 1/2 set or raising the floor for a full set on your DL
OK, I just found the correct Jake Heads. It was not easy to find. Now I need to find the bolts, tall valve covers, and harness. Question, is there only one type of harness or are the wiring harnesses different for each type of Jake? Also, would any series 60 12.7 two piece valve cover work or are they specific to a particular Jake model? Thanks for the help!
One more question. The Jake heads I purchased are 12 volt for the solenoids. Can I make that work or will I need to purchase the 24 volt solenoids?
Are you going to use the factory harness & power supply for the Jakes or running your own wires?
If your factory harness already has wiring for the Jakes, double check to see if it's 12v or 24v. Not sure about MCI but on my GM I'm surprised sometimes and find 12v devices I expected to be 24v.
If you're running your own wiring, then if you have a 12v source to tap into in the chassis system it seems like you could run with that. Unless someone knows a reason why not.
You are going to need 24v and it going to take some programing on the engine and transmission have Allison program the transmission where you have no gear drop droping from 6th to 4th sucks , you can wire direct with 12v but not a good idea with your drive train
Clifford
Do you know if my bus already has the harness under the valve cover or do I have to purchase one? Also, can any tall 12.7 valve cover work, or is it Jake model specific? Thanks for all the help.
Quote from: luvrbus on January 11, 2021, 05:12:43 PM
You are going to need 24v and it going to take some programing on the engine and transmission have Allison program the transmission where you have no gear drop droping from 6th to 4th sucks , you can wire direct with 12v but not a good idea with your drive train
I'm hoping the factory harness is already in my bus. Then I can install the Jakes and have the computers programmed.
I will check the voltage before I order more parts.
Quote from: richard5933 on January 11, 2021, 03:45:45 PM
Are you going to use the factory harness & power supply for the Jakes or running your own wires?
If your factory harness already has wiring for the Jakes, double check to see if it's 12v or 24v. Not sure about MCI but on my GM I'm surprised sometimes and find 12v devices I expected to be 24v.
If you're running your own wiring, then if you have a 12v source to tap into in the chassis system it seems like you could run with that. Unless someone knows a reason why not.
Jc there are 2 different tall covers that I know of, 2 piece like mine in the first pic and one piece like second pic not sure the pros or cons of each
You should be able to find a taller riser and use the same valve covers,I doubt you will have a harness, you may get lucky though
If you call MCI with the VIN, they can probably tell you if the wiring harness is equipped.
Today I spent a couple hours trying to find some history on my Series 60 Reliabilt engine. I called multiple certified Detroit shops and gave them my engine number and no one seems to be able to pull up any info, history, specs, etc. Does anyone on this forum have a contact that can lookup the data on a Detroit Relibilt engine?
It looks like my valve covers are the two piece version. There's not much room for taller ones. I found a spacer on eBay but I am not sure it's the correct height for jakes. Here's a pic of mine. Does anyone have pictures of their series 60 with jakes valve covers so I can compare?
Jc you need a taller top piece I already posted this pic but here it is again
As you can see my spacer is the same but it's the top cover that's taller
Phil the guy that takes care of this board has a DL3 has the regular valve cover with the taller riser on his series 60 mine did too, but as you know the floor has to be raised for jakes on a series 60 on all 6 cylinders no way around it.Pac/Brake may have the taller riser if they will sell it without the complete set up.They are aftermarket Pac/Brake could not sell the tall covers only the riser in their kits but I was told the 60 series G model (CNG) engines and marine engines with a heat exchanger have the taller riser but don't know that for sure
Yours looks to have so much more space between the beam and the cover. Mine is very tight. I know I need to raise the floor for the taller cover. That is not a problem, I'm just trying to figure out the cover issue.
Quote from: 6805eagleguy on January 25, 2021, 07:27:22 AM
Jc you need a taller top piece I already posted this pic but here it is again
As you can see my spacer is the same but it's the top cover that's taller
See if you can find a tall one piece cover from a truck salvage yard. You don't have to use the 2 piece since you're going to raise the floor and put full jakes on anyway. A lot of the trucks used taller one piece covers. That's what's on mine. You might also try http://fowlersautowrecking.com they probably have a hundred or more of the dl3.
Thanks Derrick. That's a good suggestion.
Quote from: thomasinnv on January 25, 2021, 04:20:37 PM
See if you can find a tall one piece cover from a truck salvage yard. You don't have to use the 2 piece since you're going to raise the floor and put full jakes on anyway. A lot of the trucks used taller one piece covers. That's what's on mine. You might also try http://fowlersautowrecking.com they probably have a hundred or more of the dl3.
Derrick
Do you have a model number for the cover that's on yours. I am having the hardest time finding the correct valve cover for a full set of brakes.
Quote from: thomasinnv on January 25, 2021, 04:20:37 PM
See if you can find a tall one piece cover from a truck salvage yard. You don't have to use the 2 piece since you're going to raise the floor and put full jakes on anyway. A lot of the trucks used taller one piece covers. That's what's on mine. You might also try http://fowlersautowrecking.com they probably have a hundred or more of the dl3.
I don't have a number on the valve cover. Did you check with Fowlers?
Jc, around here we always use vanderhaags, they have great service and fast shipping, you just need a universal tall cover, they are all the same, here is one from vanderhaags
https://www.vanderhaags.com/detailview.php?part=24477398
You might have to make a big hole in the floor to drop a one piece cover on.... not sure what it looks like back there on a mci
Quote from: 6805eagleguy on February 23, 2021, 06:06:31 PM
You might have to make a big hole in the floor to drop a one piece cover on.... not sure what it looks like back there on a mci
On the DL3 you can put Jakes on #1-4 without any modifications but to have a full set it requires a modification to the floor. I built a little dog house over #5 & 6 and notched the floor out.
I have emailed Fowlers for months and called a few times. They haven't responded back. So no luck there.
Quote from: thomasinnv on February 23, 2021, 05:39:35 PM
I don't have a number on the valve cover. Did you check with Fowlers?
I am planing on modifying the floor. I did purchase a full set. I hope it works well.
Quote from: thomasinnv on February 24, 2021, 07:09:33 AM
On the DL3 you can put Jakes on #1-4 without any modifications but to have a full set it requires a modification to the floor. I built a little dog house over #5 & 6 and notched the floor out.
Quote from: Jcparmley on February 24, 2021, 07:04:22 PM
I have emailed Fowlers for months and called a few times. They haven't responded back. So no luck there.
I have dealt with Fowlers on several occasions. Just keep calling, email kinda gets swept under the rug. There is only one guy (i think his name is Joe??) that handles all the bus parts orders and he is always extremely busy. There is also a salvage yard in Comifornia called transit sales 18002877253 they also have several DL3's.
Quote from: 6805eagleguy on February 23, 2021, 06:05:13 PM
Jc, around here we always use vanderhaags, they have great service and fast shipping, you just need a universal tall cover, they are all the same, here is one from vanderhaags
https://www.vanderhaags.com/detailview.php?part=24477398
Why? Just order it from my link. Get it over with. Have it next Monday. Why does jc ignore me.
Rant off
I just talked to Joe at Fowlers he has tall valve covers on the shelf ready to ship. Call him after 1pm EST he said he can ship it out today.
I'm not ignoring anyone. I was simply replying to Derrick's suggestion regarding Fowler's. I plan to order from you link. Today I purchased the wiring harness. Next pay period I will order the valve cover. Then I think I should have everything for an install. That won't take place until I install the siding. Can't drive down the highway without siding. I'm anxiously waiting for the snow to melt.
Quote from: 6805eagleguy on February 25, 2021, 09:09:19 AM
Why? Just order it from my link. Get it over with. Have it next Monday. Why does jc ignore me.
Rant off
:^
Sounds good ;)