303Ga

Question 1

Brake band friction material is inspected for?

Answer 1

Burrs, embedded metal particles, severely pitted material, cracks/distortion and flaking.

Question 2

Brake drums may be reused if there is blue colouring and flaking. T/F

Answer 2

False. Heat checking can lead to failure. So can a large amount of wear, distortion and signs of over heating.

Question 3

Wear, scratches, nicks and scoring should be checked for on this component?

Answer 3

Piston sealing surfaces.

Question 4

All disks; friction, clutch and brake, must have 2 tools to be able to measure for what?

Answer 4

Flat surface and feeler gauges to measure for wear, warpage and coning.

Question 5

Manufacturers recommended procedures will only have scattered information regarding component. T/F

Answer 5

False. Manufacturers recommended procedures will have exact assembly instructions and specifications.

Question 6

What are 2 ways to check steering and brake clutches during disassembly/assembly?

Answer 6

Feeler gauges and stack height.

Question 7

Improper clearance in steering and brake discs will cause what to happen?

Answer 7

The discs will drag resulting in over heating. Failure is imminent.

Question 8

As it is apart anyway, a check on this component should be done.

Answer 8

Bevel gear and shaft.

Question 9

The service manual will give proper adjustments for these important input devices.

Answer 9

Steering clutch and brake linkages.

Question 10

In a non-modular track steering machine, the brake valve regulates ____ to the brakes.

Answer 10

Pressure

Question 11

Like the steering valve, the brake valve regulates pressure in accordance with ____ ____ ____ movement.

Answer 11

Steering control lever

Question 12

On a machine that is equipped with a steering clutch and brake type steering system,power is delivered to the final drives through the:

Answer 12

steering clutches.

Question 13

A gradual turn is accomplished on a tracked machine equipped with steering clutchesand brakes by applying the brakes T/F

Answer 13

false;

Question 14

Applying the track brake and disengaging the same side clutch on a machineequipped with steering clutches and brakes will cause the machine to:

Answer 14

perform a sharp turn.

Question 15

Steering clutches and brakes are released with the steering control levers in theirnormal position. T/F

Answer 15

false

Clutch is engaged and brakes are released

Question 16

List two (2) common brake types used in steering clutch and brake equippedmachines.

Answer 16

a) band-type brakesb) multiple-disc, oil bath brakes

Question 17

Many modern crawler tractors are equipped with modularized steering clutch andbrake assemblies. On these units, the:

Answer 17

brakes and clutches are spring applied.

Question 18

A priority valve is often used when the transmission charging pump is used to supplysteering clutch and brake control system. The function of the priority valve is to:

Answer 18

Ensure that oil flow from the transmission charging pump satisfies the needs of thesteering clutch and brake control system before allowing oil to flow to thetransmission or torque converter.

Question 19

Caution must be taken when disassembling crawler tractor brake assemblies becausethey contain:

Answer 19

very strong springs

Question 20

List four (4) friction disc faults that should be noted when performing a visual inspection

Answer 20

a) burrsb) embedded metal particlesc) severely pitted friction materiald) cracks and distortion

Question 21

A flat surface and a set of feeler gauges are required when checking clutch and brakediscs for

Answer 21

warpage and cone.

Question 22

If steering clutch and brake linkages are out of adjustment, the clutches and brakesmay not fully apply or release.T/F

Answer 22

true

Question 23

What are 5 visual inspections you should make

Answer 23

1) Power train oil level and condition
2) Leakage
3) Control linkage condition and adjustment
4) Condition and adjustment of tracks
5) Check filters

Question 24

What are you looking for while inspecting the control linkages

Answer 24

Inspect for bent or damaged components, ensure that the linkage operates smoothly with no binding and that the linkage is correctly adjusted.

Question 25

Why is it important to warm the the steering system to operating temp.?

Answer 25

Steering system leakage increased significantly as the oil temp increases. Normal operating temp. Is between 65.5C (150F) and 82.2C (180F)

Question 26

If you have a slipping brake what will be the result during a stall test?

Answer 26

Creeping forward or veering to the left or right.

Question 27

What is a sign of slipping steering clutches in a stall test

Answer 27

Stall speed that is higher than specification in all transmission ranges.

Question 28

Non-modularized brake systems use what type of brake?

Answer 28

The brake is a wet contracting band type

Question 29

In a non-modularize brake and steering clutch when is the brake applied?

Answer 29

When the steering control lever is pulled out all the way

Question 30

The friction material in a brake band must be inspected for burrs, embedded metal particles,pitted friction material, cracks, distortion and flaking friction material.
If any faults are found what must be done?

Answer 30

The brake bands must be re-lined or replaced

Question 31

Brake drums should be inspected for what?

Answer 31

Cracks and heat checks, wear and distortion, and overheating

Question 32

What are two ways to check clutch and brake disc clearances?

Answer 32

Stack height checks or by using feeler gauges.

Question 33

What’s another name for a bevel gear shaft?

Answer 33

The cross shaft

Question 34

True or false. Brake linkage adjustments are made after the clearances adjusted between the brake band and drum

Answer 34

True. Tighten the band all the way, back off one and a half turns. Then make any necessary brake linkage adjustments

Question 35

Pressure gauge reading should be done at what rpm?

Answer 35

Low idle and high idle

Question 36

A pressure gauge installed before braking circuit should read?

Answer 36

0 when not applied. As lever is pulled smooth engagement to max pressure

Question 37

Cooler bypass valve opens when?

Answer 37

Excessive restriction in cooler is found. As a result lube circuit starvation occurs

Question 38

On a unit equipped with steering clutches engine power is transmitted through the transmission and split equally between the left and right tracks. (T/F)

Answer 38

True.