Brakes And Suspension

Question 1

What are the three types of suspension?

Answer 1

Steel spring
Rubber spring
Rubber torsion

Question 2

How many pins, bushings and nuts are on a single, tandum, and Tri-axle?

Answer 2

Single- 6
Tandum- 14
Tri-axle- 24

Question 3

What’s the purpose of a shock absorber?

Answer 3

To control bounce and maintain tire to the road contact

Question 4

What can worn suspension cause?

Answer 4

Tire wear
Poor handling
Noise

Question 5

What will loose U bolts cause?

Answer 5

Can cause broken centre bolts

Question 6

What will a broken rebound clip cause?

Answer 6

Can cause main leaf breakage

Question 7

How much of a life will an axle flip give you?

Answer 7

4-6 inches

Question 8

What’s the recommended camber for a axle?

Answer 8

3/8 degree

Question 9

What’s the recommended toe in angle?

Answer 9

1/8 inch

Question 10

How often should you re-torque?

Answer 10

After the first 50 and 100 miles

Question 11

What is static unbalance?

Answer 11

When there’s a heavy spot on a part of the tire or wheel assembly

Question 12

What’s dynamic unbalance?

Answer 12

Weight of the wheel and tire is uneven towards the edge of the wheel

Question 13

What will unbalanced wheels cause?

Answer 13

Suspension wear

Question 14

What is UVW?

Answer 14

Unloaded vehicle weight

Question 15

What is servo breaking?

Answer 15

When the primary shoe pushes up against the secondary forcing it against the drum.

Question 16

What causes spongy brakes.

Answer 16

Boiling water or clean fluid

Question 17

Surge brakes are not used with what kinda hitch?

Answer 17

Equalizing hitches. And cannot be used with friction sway controls

Question 18

What’s the maximum weight trailer that you can use surge brakes on?

Answer 18

6,000 ibs

Question 19

What pulls the brake shoes away from the drum?

Answer 19

The return springs

Question 20

What’s the surface that the magnet comes in contact with?

Answer 20

The armature

Question 21

What’s the three types of brake controllers?

Answer 21

Inertia
Electric actuator
Hydraulic

Question 22

What determines the full potential braking?

Answer 22

Battery voltage

Question 23

How fast do you drive when setting the brake controllers?

Answer 23

40km/h

Question 24

When adjusting brakes, turn to lock up the back off how many clicks?

Answer 24

5-7. Or till slight drag

Question 25

At what point do you need to replace brake shoes?

Answer 25

1/32 from rivets | 1/16 from bond Line

Question 26

How much amp draw per brake?

Answer 26

6-7 per axle | Or 3-3.5 amps per brake

Question 27

How much can you machine off the armature?

Answer 27

0.010”

Question 28

How much can you machine off the drum surface?

Answer 28

0.030” less the the max diameter

Question 29

What can you not use of cast iron parts?

Answer 29

Petroleum products

Question 30

What grease is recommended to use?

Answer 30

Extreme pressure

Question 31

What’s the minimum sized brake wires?

Answer 31

14 gauge

Question 32

What’s the blue wire from the brake controllers?

Answer 32

Power to trailer brakes

Question 33

What the red wire from the brake controllers?

Answer 33

Cold side of the brake light switch

Question 34

What’s the maximum you can hone off a hydraulic brake?

Answer 34

0.005”