Tracked Equipment Steering Fundaments and Service

Question 1

1. . On a machine that is equipped with a steering clutch and brake type steering system,
   power is delivered to the final drives through the:
   a) brakes.
   b) steering clutches.
   c) steering differential.
   d) steering motors.

Answer 1

1. b) steering clutches.

Question 2

A gradual turn is accomplished on a tracked machine equipped with steering clutches and brakes by applying the brakes.

a) true
b) false

Answer 2

2. b) false; A gradual tum is accomplished on a tracked machine equipped with
   steering clutches and brakes by disengaging one steering clutch.

Question 3

3. Applying the track brake and disengaging the same side clutch on a machine
   equipped with steering clutches and brakes will cause the machine to:
   a) continue in a straight line.
   b) perform a gradual tum.
   c) perform a sharp tum.
   d) counter-rotate.

Answer 3

3. c) perform a sharp turn.

Question 4

4. Steering clutches and brakes are released with the steering control levers in their normal position.
   a) true
   b) false

Answer 4

4. b) false; Steering clutches are engaged and brakes are released with the steering control levers in their normal position.

Question 5

5. List two (2) common brake types used in steering clutch and brake equipped machines.
   a)
   b)

Answer 5

5. a) band-type brakes

b) multiple-disc, oil bath brakes

Question 6

6. Many modem crawler tractors are equipped with modularized steering clutch and
   brake assemblies. On these units, the:
   a) brakes and clutches are spring applied.
   b) brakes and clutches are spring released.
   c) brakes are spring released while clutches are released with oil pressure.
   d) clutches are spring released while brakes are released with oil pressure.

Answer 6

6. a) brakes and clutches are spring applied.

Question 7

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

Answer 7

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

Question 8

8. Caution must be taken when disassembling crawler tractor brake assemblies because
they contain:
a)   high oil pressure.
b)   high air pressure.
c)   toxic material.
d)   very strong springs.

Answer 8

8. d) very strong springs.

Question 9

9.   List four (4) friction disc faults that should be noted when performing a visual
inspection.
a)
b)
c)
d)

Answer 9

9. Any four ( 4) of the following are correct.
   a) burrs
   b) embedded metal particles
   c) severely pitted friction material
   d) cracks and distortion
   e) flaking friction material
   f) damaged spline teeth

Question 10

l 0. A flat surface and a set of feeler gauges are required when checking clutch and brake
discs for:

Answer 10

warpage and cone.

Question 11

11. If steering clutch and brake linkages are out of adjustment, the clutches and brakes may not fully apply or release.
    a) true
    b) false

Answer 11

11. a) true