larry cad
ohio
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captron33 wrote:Spartan confirmed i have a 2 stage exhaust brake., based on my vin number.
Did they offer any suggestions on the problem?
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captron33
usa
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No, probably not electric.
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larry cad
ohio
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captron33 wrote:No, probably not electric.
Then I would look into the butterfly valve mechanical operation. The valve is easy to remove and then it is easy to verify if the valve is working.
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oldave
Tx
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2-stage exhaust brake? Are you sure? Not an engine brake? I believe a 2-stage is an engine brake.
An engine brake is much more effective.
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Ray,IN
IN, USA
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Joined: 03/22/2001
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captron33 wrote:Spartan confirmed i have a 2 stage exhaust brake., based on my vin number.
Then your engine has a 2-stage engine compression(Jake) brake, not an exhaust brake. The Jacobs compression brake opens the exhaust valves just before the piston reaches TDC on compression stroke.
reference: https://official.bankspower.com/tech_article/how-an-exhaust-brake-works/
and
https://www.jacobsvehiclesystems.com/technologies/compression-release-engine-brake
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wolfe10
Florida
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captron33 wrote:Spartan confirmed i have a 2 stage exhaust brake., based on my vin number.
No such thing.
If two stage, it is an ENGINE COMPRESSION BRAKE.
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wolfe10
Florida
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captron33 wrote:No, probably not electric.
Please explain what this means.
Thanks.
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captron33
usa
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Its labeled exhaust brake on the switch. Hi and low. Obviously I’m not a mechanic, i will take to one to get it looked at and fixed. Its in storage for 6 months or so for now. Spartan told me the only electrical component is a diode. So no cb,s to check out.
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wolfe10
Florida
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With a two stage engine compression brake, you WILL have an electric signal that both downshifts the Allison (left or only shift pad window will change from 6 to some lower gear-- often 2nd or 4th) AND will signal the engine ECU to apply either 3 (low) or 6 (high) compression braking.
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