Brakes

Question 1

Cut in should begin at what PSI

Answer 1

85-105

Question 2

Cut out should begin at what PSI

Answer 2

115-130

Question 3

Static test with loss of

Answer 3

2 psi 1 min

Question 4

Applied test with loss of

Answer 4

3 psi 1 min

Question 5

Oos criteria braking systems

Answer 5

Air gauge has failed
Low air warning device no audible at 55-75 psi
Brake fluid class 1 leak
Aux brake not operational

Question 6

Low air will activate at what psi

Answer 6

55-75

Question 7

Safety valve on the supply tank will activate

Answer 7

150psi

Question 8

Air Compressor is driven by the_______ as it is a _________ mounted directly to the __________.

Compressor is always _________. But doesn’t always __________ ______.

Compressor is lubricated by the _____ from the ________.

Compressor is also cooled by the _______. As ________ is constantly flowing through the compressor.

Problems with the engine will directly affect the performance of the __________ and _________.

Answer 8

Air Compressor is driven by the ENGINE as it is a DIRECT DRIVE, and mounted directly to the ENGINE.

Compressor is always RUNNING. But doesn’t always COMPRESS AIR.

Compressor is lubricated by the OIL from the ENGINE.

Compressor is also cooled by the ENGINE. As COOLANT is constantly flowing through the compressor.

Problems with the engine will directly affect the performance of the COMPRESSOR and BRAKES.

Question 9

Governor tells the _______ what to do.

Governor is ________ loaded

Governor can be adjusted by ________.

If the _________ exceeds _______ then it sends the _______ back to the ________which then escapes via the air filter

Answer 9

Governor tells the compressor what to do.

Governor is spring loaded

Governor can be adjusted by the little screw on the side

If the air pressure exceeds spring tension then it sends the air back to the compressor which then escapes via the air filter

Question 10

Telma definition

Answer 10

Electromagnetic retarder that slows down the drive line using magnetic eddy currents

Downfall is the torque introduced to the driveline

Question 11

Braking Components are

Answer 11

Compressor: build up maintain pressure
Reservoir: to store compressed air
Treadle valve: draws compressed air when applied
Brake chamber: transfers force of compressed air to mechanical force
Brake drums, shoes: creates friction to slow the vehicle

Question 12

Transmission Retarder definition

Answer 12

A vaned flywheel know as the torque converter is inside the transmission housing and absorbs energy as it is introduced to oil.

Downfall is it creates heat in the transmission