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04-16-2014, 10:31 PM
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#1
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Senior Member
Join Date: Jun 2011
Location: On Another Adventure
Posts: 2,563
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Engine Brake Question
My engine brake switch has two positions - the rocker switch can be pushed from top and bottom.... Almost like position 1 and position 2...
What's the difference??? Come on
Superchief - I know you know... Let's hear it....
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04-16-2014, 10:59 PM
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#2
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Junior Member
Join Date: Mar 2014
Posts: 6
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Usually high and low setting.
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04-17-2014, 06:41 AM
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#3
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Senior Member
Join Date: Apr 2012
Location: West Michigan/Fort Myers
Posts: 3,927
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In the case if my 2011 340RB it is off and on.
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04-17-2014, 07:31 AM
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#4
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Member
Join Date: Jan 2013
Posts: 58
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My 2008 is off / on as well
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2008 Berkshire 390TS
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04-17-2014, 08:05 AM
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#5
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Senior Member
Join Date: May 2013
Location: Virginia
Posts: 619
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Same here on my 14, off or on. When in the city, hills or traffic I leave it on to save my brakes, but when I'm on the interstate I leave it off because if I take my foot off the gas or go down a hill it shifts down a gear and RPM'S go up and I lose momentum...
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04-17-2014, 08:53 AM
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#6
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Senior Member
Join Date: Jun 2011
Location: On Another Adventure
Posts: 2,563
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My switch is a rocker switch - off is in middle position, then I can push it on by either pushing on the top or bottom... Not sure why it would require a rocker switch instead of a simple on/off switch...
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04-17-2014, 08:54 AM
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#7
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Senior Member
Join Date: Apr 2008
Location: Long Island (Nassau County), NY
Posts: 4,352
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Quote:
Originally Posted by JTN8
Same here on my 14, off or on. When in the city, hills or traffic I leave it on to save my brakes, but when I'm on the interstate I leave it off because if I take my foot off the gas or go down a hill it shifts down a gear and RPM'S go up and I lose momentum...
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X2! Same here.
__________________
Tom and Margaret
2014 Berkshire 390bh-60
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04-17-2014, 09:34 AM
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#8
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Senior Member
Join Date: Apr 2012
Location: West Michigan/Fort Myers
Posts: 3,927
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Quote:
Originally Posted by ernest917
My switch is a rocker switch - off is in middle position, then I can push it on by either pushing on the top or bottom... Not sure why it would require a rocker switch instead of a simple on/off switch...
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Do you have the Mercedes motor?
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04-17-2014, 09:40 AM
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#9
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Senior Member
Join Date: Jun 2011
Location: On Another Adventure
Posts: 2,563
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Yes I do and it's great....
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04-17-2014, 09:43 AM
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#10
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Senior Member
Join Date: Sep 2012
Location: Campbell River
Posts: 258
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In large tractors (18 wheeler) they have a 2 position switch for high and low engine brake or if you like to think of it differently partial jake and full. Not sure if your system is set up the same or maybe pre-wired for 2 with an option to upgrade..?
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Glen & Robyn (A.K.A. Puff & Crickit) Full Timers.. 
2006 F350 6.0 with 3.73 gears, 4X4, Extra-Cab Long Box, Oil/Tranny/P.S. Coolers. Coolant filter. SCT Livewire.
2011 Cedar Creek 36RE, Auto levelers + too much to list..!
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04-17-2014, 12:33 PM
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#11
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Senior Member
Join Date: Apr 2012
Location: West Michigan/Fort Myers
Posts: 3,927
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Quote:
Originally Posted by ernest917
Yes I do and it's great....
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That's why your break is different. The Cummins don't have a true exhaust break.
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04-18-2014, 06:19 AM
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#12
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Senior Member
Join Date: Sep 2012
Posts: 188
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The Mercedes has a two stage engine brake. High and low. Nice feature and as Phil57 said, Mercedes has a true engine brake that is much more effective than the Cummins.
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James
2008 Berkshire 360QS-40
"If you can't fix it with a hammer, you have an electrical problem"
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04-18-2014, 01:06 PM
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#13
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Senior Member
Join Date: Nov 2012
Location: Home is where I park it
Posts: 1,503
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Quote:
Originally Posted by puff
In large tractors (18 wheeler) they have a 2 position switch for high and low engine brake or if you like to think of it differently partial jake and full. Not sure if your system is set up the same or maybe pre-wired for 2 with an option to upgrade..?
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X2+ The some Volvos can have as many as six positions. Each position brings in an extra cylinder. VERY fancy, no??
Boowho??
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04-18-2014, 01:49 PM
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#14
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Senior Member
Join Date: Mar 2014
Posts: 102
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Engine Brake Question
So my "Engine Brake" switch is really an exhaust brake? (2008 Berkshire 390bh-50)
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04-18-2014, 05:16 PM
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#15
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Senior Member
Join Date: Apr 2012
Location: West Michigan/Fort Myers
Posts: 3,927
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Quote:
Originally Posted by chesterhull
So my "Engine Brake" switch is really an exhaust brake? (2008 Berkshire 390bh-50)
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Hard to tell. What engine do you have.
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04-18-2014, 06:14 PM
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#16
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Senior Member
Join Date: Mar 2014
Posts: 102
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I have the ISB...350hp
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04-18-2014, 06:19 PM
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#17
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Senior Member
Join Date: Sep 2013
Location: Idaho
Posts: 9,839
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__________________
2016 F350 6.7L LB CC Reese 28K 2014 Chaparral Lite 266sab
"Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety." 2014 19 days camping 2015 17 days camping201620 days camping
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04-18-2014, 07:32 PM
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#18
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Senior Member
Join Date: Sep 2012
Posts: 188
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Quote:
Originally Posted by chesterhull
So my "Engine Brake" switch is really an exhaust brake? (2008 Berkshire 390bh-50)
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Yes, in a matter of speaking. The system used on the cummins ISB's is controlled by the turbocharger. Probably best to google it for the technical explination on how it works. Pretty innovative system but is a lower cost alternative to a true engine brake.
__________________
James
2008 Berkshire 360QS-40
"If you can't fix it with a hammer, you have an electrical problem"
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04-19-2014, 09:35 AM
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#19
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Cyclone
Join Date: Nov 2012
Location: Iowa
Posts: 182
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It's also quieter than a Jake brake so you can use it in places where exhaust brakes are prohibited by law.
Sent from my SCH-R530U using Forest River Forums mobile app
__________________
2015 SOB 5th Wheel
2013 Chevrolet 3500 CC, DD SRW
1 Wife, 2 Kids under 5
Camping nights: 2015 - 19, 2014 - 39, 2013 - 48
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04-19-2014, 10:05 AM
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#20
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Phat Phrog Stunt Team
Join Date: Aug 2011
Location: Iowa
Posts: 34,507
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Quote:
Originally Posted by beipers
It's also quieter than a Jake brake so you can use it in places where exhaust brakes are prohibited by law.
Sent from my SCH-R530U using Forest River Forums mobile app
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"normally" engine brakes are prohibbitted not "exhaust" brakes.
Exhaust brakes retard power in a diesel engine, but in an different way than engine brakes. Engine brakes release compressed air through an exhaust valve, but exhaust brakes hold the compression in the engine and slow the crankshaft's rotation, which reduces vehicle speed
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