Undercarriage Systems, Fundamentals and Service Flashcards
Track tension and recoil mechanisms must be inspected, maintained and serviced only after you have read the service information relating to these systems.
True
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. Poor weather
B. Inadequate equipment shelter
C. Lack of light, heat or other amenities at the site.
D. Location of the operation site. (May be remote)
E. Your level of expertise.
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.
e. any of the above items are correct.
When you work on an undercarriage system you often need:
a. a co-worker
b. a service manual
c. hydraulic jacks, hoists, or lift trucks.
d. sturdy support stands.
e. all of the above.
e. all of the above.
Explain the most important safety precaution you must take if you have to raise a machine to access undercarriage components.
Use support stands of sufficient capacity to hold the weight of the machine and all attachments, including the undercarriages.
When very high torque specifications are indicated, you must use a very large torque wrench.
False, use a torque multiplier and torque wrench.
Many undercarriage components can be remanufactured. What determines if a particular component can be rebuilt or not?
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.
Track chain tension that is to 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.
a. accelerated wear of the moving undercarriage components.
Explain how pin and bushing wear is measured.
A tape measure is used to measure the distance between track pins a set number of links apart. Track is stretched tight. Measurements are compared to service manual specifications.
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.
False
Lifting wedges are used to raise the machine when the machine is immobilized.
False, using lifting wedges requires the machine to be driven up on them.
Explain what steps you would take before you installed new or exchange components on a machine.
a. remove old components and clean mounting surfaces.
b. Inspect the mounting surface and bolt holes for cracks or damage.
c. clean all protective paint and other material off mounting surface on new component.
d. Inspect new components mounting surface for flatness.
e. Check the mating surfaces of both parts to determine mounting direction or clocking.
f. Test fit the components. Make sure full contact and install fasteners.
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.
False.
