Wheeled Equipment Steering Fundamentals and Service Part B

Question 1

1. Track tension and recoil mechanisms must be inspected, maintained and serviced only after you have read the service information relating to these systems.
   a) true
   b) false

Answer 1

1. a) true

Question 2

2. Track chain tension that is too tight can cause:
   a) accelerated wear of the moving undercarriage components.
   b) the track chain to slip off the track frame during hard cornering maneuvers.
   c) less wear of the moving undercarriage components.
   d) a rapid loss of nitrogen gas from the recoil cylinder.

Answer 2

2. a) accelerated wear of the moving undercarriage components.

Question 3

3. You are inspecting an undercarriage system while the machine is in the field. List
   some of the conditions/problems that might hamper your inspection.
   a)
   b)
   c)
   d)

Answer 3

3. Any four (4) of the following are correct.
   a) poor weather conditions,
   b) inadequate equipment shelter
   c) lack of heat, light or other amenities at the inspection site,
   d) location of the operation site (drive-in versus fly-in)
   e) your level of expertise

Question 4

4. Explain how pin and bushing wear is measured.

Answer 4

4. A tape measure is used to measure the distance between the centre of one track pin to the centre of another track pin, perhaps four or five links apart. The track is stretched tight at this time. The measurement is compared to specifications.

Question 5

5. Multi-purpose wear gauges are suitable for measuring:
   a) grouser height and profile.
   b) track link height.
   c) idler and roller wear and profile.
   d) sprocket tooth wear and profile.
   e) any of the above items are correct.

Answer 5

5. e) any of the above items are correct.

Question 6

6. The wear on the flanges of the rollers would be even if a machine is constantly working on a hillside and moving in one direction only.
   a) true
   b) false

Answer 6

6. b) false; The roller flange wear would tend to be more pronounced on one flange. If the machine turned direction regularly the flange wear might more even on both flanges.

Question 7

7. When you work on an undercarriage system you often need:
   a) a co-worker.
   b) a service manual.
   c) hydraulic jack(s), hoist(s) and/or lift truck(s).
   d) sturdy support stands.
   e) all of the above responses are correct.

Answer 7

7. e) all of the above responses are correct.

Question 8

8. Lifting wedges are used to raise the machine when the machine is immobile.
   a) true
   b) false

Answer 8

8. b) false; Lifting wedges are used to raise the machine when the machine is
   mobile. The tracks climb up the wedges and lift the machine high enough to place support stands under the main frame

Question 9

9. Explain the most important safety precaution you must take if you have to raise a
   machine to access undercarriage components.

Answer 9

9. Use support stands of sufficient capacity to hold the weight of the machine and all attachments, including the undercarriages.

Question 10

10. Explain what steps you would take before you installed new or exchange components on a machine.
a)
b)
c)
d)
e)
f)

Answer 10

10. a) Remove the old component and clean the mounting surface.
    b) Inspect the mounting surface and bolt holes for signs of cracks or other damage.
    c) Clean all protective paint and other material off the mounting surface of the new component.
    Inspect the new component mounting surfaces. Check for flatness and cleanliness.
    e) Check the mating surfaces of both parts to determine if a specific mounting direction is required.
    t) Test fit the components together and make sure full contact is possible before installing the mounting fasteners.

Question 11

11. When very high torque specifications are indicated. You must use a very large torque wrench.
    a) true
    b) false

Answer 11

11. b) false; You would more likely use a torque wrench and a torque multiplier to
    tighten cap screws that require very high torque settings.

Question 12

12. Track pins and bushings can be turned many times. These components only need to be replaced if they cannot be built up any more due to lack of material on the original casting.
    a) true
    b) false

Answer 12

12. b) false; Pins and bushings can only be turned once.

Question 13

13. Many undercarriage components can be remanufactured. What determines if a particular component can be rebuilt or not?

Answer 13

13. Components can be remanufactured as long as they are removed for rebuild while they are still within the service limits specified in the service manual for that machine.