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carl white (Carl_mci_9)
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Username: Carl_mci_9

Post Number: 19
Registered: 1-2007
Posted From: 24.154.148.105

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Posted on Sunday, July 01, 2007 - 9:55 pm:   

I have the engine and transmission out of my bus. Since I am rebuilding my 8v71 I want to put jake brakes on it. What type of wiring must I use and any hints of placement of the wire and switches?
Any help would be appreciated.
Carl
Jack Campbell (Blue_goose)
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Username: Blue_goose

Post Number: 21
Registered: 5-2007
Posted From: 71.101.55.168

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Votes: 1 (Vote!)

Posted on Sunday, July 01, 2007 - 10:08 pm:   

Use this link and all you need is there.
http://www.jakebrake.com/support/parts-and-service-literature.php?engine_mfr=3&engine_mode l=28&jacobs_product=25
Richard Bowyer (Drivingmisslazy)
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Username: Drivingmisslazy

Post Number: 1932
Registered: 1-2001
Posted From: 75.108.74.232

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Posted on Monday, July 02, 2007 - 9:20 am:   

One tip I have. Mount the Off-HI-LOW switch so that it is very convenient to your left hand that you can reach and find and use without looking down or stretching. I found it was something that was used more than any other control on the coach.
Richard
John Lacey (Junkman42)
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Username: Junkman42

Post Number: 10
Registered: 3-2007
Posted From: 204.49.140.131

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Posted on Tuesday, July 03, 2007 - 4:44 pm:   

Does anyone know whether there is a high low switch on a mc7. I only have a switch that says jake on off. Is it possible that it is labled or hidden? I have the ht70 6 speed, is it possible that I dont have a high low switch because of that? Thanks in advance,John.
Richard Bowyer (Drivingmisslazy)
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Username: Drivingmisslazy

Post Number: 1938
Registered: 1-2001
Posted From: 75.108.74.232

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Posted on Tuesday, July 03, 2007 - 6:02 pm:   

I have read several places that some Jakes were installed with a simple on-off switch. All 6 or 8 cylinders come on or off with the switch.
Many times full Jakes on all cylinders provides too much braking. That is why most recommendations are to provide the two step brakes. Even going down something like the grapevine in California the two step brakes are very nice.
Richard

I also strongly recommend that when wiring your Jakes you use the Hi-Low-Off switch to control two control relays (cubes) located somewhere in the engine compartment. That way the amps of the Jake solenoids under the valve covers are not drawing their current thru the control switch.
Richard

(Message edited by DrivingMissLazy on July 03, 2007)
Arnie Molloy (Ayjay)
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Username: Ayjay

Post Number: 75
Registered: 10-2005
Posted From: 141.154.125.145

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Posted on Friday, July 06, 2007 - 3:55 pm:   

Hi:
I wired mine using a DPDT (center-off) toggle switch.
Center is "OFF", of course, One side activates one bank, the other activates both banks of Jakes.
I've also added relays in the battery compartment( about 6 feet from the engine), to apply a full 24 volts to the Jake solenoids instead of running the battery voltage thru 80' or so of wire.

AyJay

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