TB 48 Jacobs Engine Brake

Question 1

TB 48 Jacobs Engine Brake

The Jacobs Engine Brake is a hydraulic engine attachment that, when energized, alters the engine exhaust valve operation which converts the diesel engine into an air compressor. This is accomplished by prematurely opening the exhaust valves near the top of the compression stroke releasing the compression pressure to exhaust.

Answer 1

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Question 2

TB 48 Jacobs Engine Brake

It will activate or deactivate in less than 1/4 of a second.

Answer 2

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Question 3

TB 48 Jacobs Engine Brake

DO NOT ENGAGE THE JAKE BRAKE ON WET STREETS. THE ADDITIONAL BRAKING EFFORT ON THE DRIVE WHEELS (DUALS) CAN CAUSE THEM TO LOCK UP WHICH
COULD RESULT IN AN UNCONTROLLABLE SKID.

Answer 3

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Question 4

TB 48 Jacobs Engine Brake

DO NOT ENGAGE THE JAKE BRAKE DURING PUMPING OR AERIAL OPERATIONS.

Answer 4

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Question 5

TB 48 Jacobs Engine Brake

Advantages for apparatus equipped with “Jake Brakes” include?

Answer 5

increased performance

safety

versatility

cost-effectiveness.

Question 6

TB 48 Jacobs Engine Brake

USAGE GUIDE LIGHT TRAFFIC CONDITION
Minimum Jake Brake switch setting

MEDIUM TRAFFIC CONDITION
Minimum to moderate Jake Brake switch setting

HEAVY TRAFFIC CONDITION AND EMERGENCY RESPONSES
Maximum Jake Brake switch setting

Answer 6

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