T4 ASE BRAKES (MEDIUM/HEAVY
DUTY BRAKES) EXAM 2024/25!!
1 of
65
Definition
1) should be replaced if bulging or swelling is present
when the brakes are fully applied.
2) Improper routing, clamping or crimping is cause for
replacement.
3) it is not recommended and illegal to splice or patch a
leaking brake line or hose.
4) must be replaced with DOT approved material
intended for specific application.
, 5) do not change the diameter of the hose.
Give this one a try later!
Replacement of lines
and hoses. Hydraulic Brakes Troubleshooting
Diagnosing Manual Slack Gear Driven Compressor
adjusters
Don't know?
2 of 65
Definition
1) installed in each reservoir/tank to help purge the
system from moisture.
2) Used in high humid or wet climates.
3) manual drain valves should be drained on a daily basis
Give this one a try later!
Manual and Automatic
Manual Slack adjuster
installation Drain Valves
, Troubleshooting poor brake
Vacuum Booster
Troubleshoot performance due to air
Don't know?
3 of 65
Definition
1) require the spring be mechanically captured to avoid
accidental releasing.
2)do not drop spring brake cause the high tension spring may
cause chamber to fly apart.
3) if spring brake is damaged do not attempt to cage.
Give this one a try later!
Spring Brake Valve Gear Driven Compressor
Caging Brake
Chamber Parking Brake
Don't know?
4 of
65
Definition
, 1) front of vehicle dives when brakes applied, suspect a
defecting metering or combination valve.
2) Rear brakes lock up, suspect out of adjustment load
proportioning or combination valve. this valve provides maximum
braking balance based on trucks payload.
Give this one a try later!
Service Brake Pressure Drop Test Push Pull Valves- Yellow
Hydraulic
Air Disc Brake
troubleshooting Brakes
Troubleshooti
ng
Don't know?
5 of 65
Definition
1) tank closest to the compressor.
2) "pop off valve" located on this tank to keep from over
pressuring the system.
Give this one a try later!
Gear Driven Compressor Air Compressor troubleshooting
Troubleshooting air leaks Supply Reservoir "Wet Tank"
DUTY BRAKES) EXAM 2024/25!!
1 of
65
Definition
1) should be replaced if bulging or swelling is present
when the brakes are fully applied.
2) Improper routing, clamping or crimping is cause for
replacement.
3) it is not recommended and illegal to splice or patch a
leaking brake line or hose.
4) must be replaced with DOT approved material
intended for specific application.
, 5) do not change the diameter of the hose.
Give this one a try later!
Replacement of lines
and hoses. Hydraulic Brakes Troubleshooting
Diagnosing Manual Slack Gear Driven Compressor
adjusters
Don't know?
2 of 65
Definition
1) installed in each reservoir/tank to help purge the
system from moisture.
2) Used in high humid or wet climates.
3) manual drain valves should be drained on a daily basis
Give this one a try later!
Manual and Automatic
Manual Slack adjuster
installation Drain Valves
, Troubleshooting poor brake
Vacuum Booster
Troubleshoot performance due to air
Don't know?
3 of 65
Definition
1) require the spring be mechanically captured to avoid
accidental releasing.
2)do not drop spring brake cause the high tension spring may
cause chamber to fly apart.
3) if spring brake is damaged do not attempt to cage.
Give this one a try later!
Spring Brake Valve Gear Driven Compressor
Caging Brake
Chamber Parking Brake
Don't know?
4 of
65
Definition
, 1) front of vehicle dives when brakes applied, suspect a
defecting metering or combination valve.
2) Rear brakes lock up, suspect out of adjustment load
proportioning or combination valve. this valve provides maximum
braking balance based on trucks payload.
Give this one a try later!
Service Brake Pressure Drop Test Push Pull Valves- Yellow
Hydraulic
Air Disc Brake
troubleshooting Brakes
Troubleshooti
ng
Don't know?
5 of 65
Definition
1) tank closest to the compressor.
2) "pop off valve" located on this tank to keep from over
pressuring the system.
Give this one a try later!
Gear Driven Compressor Air Compressor troubleshooting
Troubleshooting air leaks Supply Reservoir "Wet Tank"
