Slow Air Pressure Build Up 

Thanks for your help, I passed the road test today for DZ God bless you

Shoutout from TAT Express out of Hutchins, TX

Step by step below :- 1. Both brakes are applied 2. Wheels are choked 3. Transmission is in neutral 4. Vehicle is secure 5. Start the truck then say :- • Current air pressure is above 90Psi • RPM is between 600 - 900 6. Yellow brake In (red out, don't touch it) 7. Drop down the air pressure and Say :- • Air pressure is below 80 psi • Air pressure is 85 Psi Time starts now • Air pressure is 100 Psi Time stops now 8. It took _____ seconds from 85 Psi to 100 Psi so there is no defect. If it takes more then 2 mins then it is a minor defect. 9. YELLOW BRAKE OUT, Now is Read from schedule 1.

Why didnt you release your parking brake for this test (yellow should be pressed in) NOT applied. MTO would fail you for this test without Parking brake released.

Thanks amazing video ❤️

The updated MTO book says that you most release the tractor parking brake. Who knows why will that make any difference on the system.

why yellow and red brakes are applied? has it anything to do with test or they jusy for stopping the vehicle from moving

Do you have the handbrake on while pulling up aor or do you have the hand brake off

What cause a volvo fh440 to build up too much air like the meter for the airtanks are max what could be the problem

hey i have question the rpm 600 to 900

I thought you have to push the yellow button in to fan the breaks down?

You are wrong my friend. The pressure must be on 85 to start your timing and not 80

You are compounding the brakes by applying the service brake while the parking brakes are engaged, this is an automatic test failure in all 50 states.