Author Topic: How to identify Jake brake?  (Read 3581 times)

Offline Jnbroadbent

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How to identify Jake brake?
« 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.
Jon
1980 Mc9 w/ veg oil
8v71
Jacksonville Fl

Offline Timkar

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Re: How to identify Jake brake?
« Reply #1 on: January 03, 2013, 01:07:58 PM »
Wires going in to valve cover.......HTH....Tim
Cawston, British Columbia

Offline wg4t50

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Re: How to identify Jake brake?
« 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
MCI7 20+ Yrs
Foretravel w/ISM500
WG4T CW for ever.
Central Virginia

Offline eagle19952

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Re: How to identify Jake brake?
« Reply #3 on: January 03, 2013, 01:58:45 PM »
tall valve covers thats your clue.... :o
Donald PH
1978 Model 05 Eagle w/Torsilastic Suspension,8V71 N, DD, Allison on 24.5's 12kw Kubota.

Offline TomC

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Re: How to identify Jake brake?
« 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
Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.

Offline bevans6

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  • 1980 MCI MC-5C
Re: How to identify Jake brake?
« 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
1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
Allison MT-647
Tatamagouche, Nova Scotia

Offline white-eagle

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Re: How to identify Jake brake?
« 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.
Tom
1991 Eagle 15 and proud of it.
8V92T, 740, Fulltime working on the road.

Fran was called to a higher duty 12/16/13. I lost my life navigator.

Offline Jnbroadbent

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Re: How to identify Jake brake?
« 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.
Jon
1980 Mc9 w/ veg oil
8v71
Jacksonville Fl