Training Bulletin 48 Jake Brake Flashcards
What is the use of the jake brake governed by?
Traffic and road conditions
The jake brake alters what engine valve operation?
How?
Exhaust valve
Opens exhaust valve at top of compression stroke prematurely
When shall the jake brake not be used?
On wet streets
On the transmission psi switch, at what RPM does the jake brake activate?
1500 RPM
When using the jake brake, brake efficiency increases as engine speed___?
Increases
What switch deactivates the jake brake?
Transmission pressure switch
What setting of the jake brake should be used in light traffic?
Medium traffic?
Heavy traffic or emergency response?
0-minimum
Medium- minimum to moderate
Emergency- maximum setting
What type of attachment is the jake brake?
Hydraulic attachment
When does the jake brake deactivate?
At approximately 150 RPM over idle
What are the 3 positions for the jake brake with a Cummins motor?
What are the positions for a Detroit motor?
1) med
2) low
3) high
Detroit : 1) off. 2) low. 3) high.
How quick does the jake brake activate or deactivate?
1/4 second
When shall the jake brake setting be selected?
At any time
