Pre-trip

Question 1

What’s the first thing you should do before beginning your pre-trip inspection

Answer 1

Park the vehicle on level ground with parking brake set, wheels blocked, and tanks drained if possible

Question 3

Once vehicle is secured what’s the first step you take to begin your pre-trip

Answer 3

Check security and condition of compressors, let’s and airlines under hood

Question 4

After checking security conditions under the hood, what is your next step

Answer 4

Jump into the cab, start the engine and begin building air pressure

Question 5

After initial air pressure is built what can you do to continue your test
#3

Answer 5

With wheels blocked; release the park brake

Question 6

After park brakes are released what is your next set of procedure
#4

Answer 6

Check brake adjustment (push rod travel) manually. Adjust if necessary

Question 7

Following brake adjustment check what what should you do

Answer 7

Verbally explain the proper procedures for adjusting an automatic slack adjuster.
1. service brake applications of 100psi or greater
2. 6-Pack method

Question 8

After your verbal explanation of adjusting automatic slacks what is your next set of procedures

Answer 8

Get back into the cab
Test governor operations:

• cut out pressure (120-145psi)
• cut in pressure; fan brakes until compressor cuts in
  (approx. 20-25psi less than cut-out pressure, but a minimum of 100psi)

Question 9

After governor operations you will:

Answer 9

1. Rebuild to max pressure
2. ensure park brakes are released
3. shut off engine

Question 10

Once the truck is at maximum pressure and engine is off you will:

Answer 10

Turn keys to accessory

1. make and hold a foot brake application

Question 11

When holding the foot brake application what are you looking for?

Answer 11

Max air pressure loss after initial application must not exceed 1psi in 1 minute

Listen for audible air leaks

Question 12

After your foot-hold test, what comes after?

Answer 12

Fan brakes to lower air pressure:

1. low air warning comes on at a minimum of 60psi
2. emergency brake button should pop out at a minimum of 20psi

Question 13

Once low air warning and emergency valve have been tested, what comes next?

Answer 13

Turn engine back on:

1. between 600-800rpm, observe the time needed for air pressure to rise from 85-100psi
   (should be less than 2mins)

Question 14

After timing the rise in air pressure what will you then do?

Answer 14

Ensure park brakes have applied and remove wheel blocks:

1. gently try to pull ahead; release park brakes
2. move slowly ahead and make a service/foot-brake application

“That concludes my pre-trip test“

Question 15

GALE + TPS

Answer 15

Governor operations
-cut-in/cut-out
Air leak
-foot brake hold
Low warning indicator
Emergency pop off
-fan brakes

Time to build pressure
Parking brake
Service brake