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Author Topic: How to identify Jake brake?  (Read 783 times)
Jnbroadbent
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« on: January 03, 2013, 11:51:45 AM »
Bought the bus almost 3 months ago, didn't bother trying the jake on the way home, immediately started gutting and I'm just curious now. It's in no shape to drive yet, maybe next month...

Obviously it has the hi/lo jake switch but is there any external indicators that would show it is IN FACT installed.

It just creeps in the back of my mind as I'm around it.
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Jon
1980 Mc9 w/ veg oil
8v71
Jacksonville Fl
Timkar
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« Reply #1 on: January 03, 2013, 01:07:58 PM »
Wires going in to valve cover.......HTH....Tim
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65 Eagle 01  102"/45'
S60 HT754
Cawston, British Columbia
wg4t50
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« Reply #2 on: January 03, 2013, 01:31:59 PM »
Are vakve covers about 2.5" or about 6", AND  the control wire (1) goes in thru the inside of the block Vee next to the valve cover about 5" from either end of head. Im running out of words, give me a pix.
Dave M
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Dave Metzger
Had MCI-7 20+Years, Few Engines & Transmissions
8V-71, 12V-71 & 8V-92, RR RTO-910
Too old to crawl around/under, so Bought a Foretravel ISM500
Still love the ole Bus, clock ran out of time.
eagle19952
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« Reply #3 on: January 03, 2013, 01:58:45 PM »
tall valve covers thats your clue.... Shocked
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TomC
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« Reply #4 on: January 03, 2013, 02:42:26 PM »
Pull one of the valve covers and see if they are installed. Good Luck, TomC
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Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.
bevans6
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1980 MCI MC-5C




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« Reply #5 on: January 04, 2013, 03:07:27 AM »
I'm in the pull a valve cover and look camp...  Also there would be a switch on the buffer screw, and on an MCI probably a high idle cylinder type switch, pretty big and obvious right there in front of your nose when you open the engine bay door.  Now, are the jake's working is another tale...  Mine were adjusted so wrong it was comical.

Brian
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1980 MCI MC-5C converted
Vintage race cars -
1978 Lola T440 Formula Ford
1972 NTM MK-4 B/SR
white-eagle
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« Reply #6 on: January 05, 2013, 04:16:58 AM »
i had the high valve covers and the switch.  same question as you since they didn't seem to be working.  Finally opened a valve cover and verified no jakes.

boy am i glad i decided to get them tho.
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Tom and Fran
1991 Eagle 15 and proud of it.
8V92T, 740, satellite Internet, Fulltime working on the road.
Jnbroadbent
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« Reply #7 on: January 05, 2013, 03:31:11 PM »
It does have the very tall covers + wires on the inside of the block but I guess I won't know till I open up the covers! Maybe next week.
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Jon
1980 Mc9 w/ veg oil
8v71
Jacksonville Fl
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