303Ga (Not Completed) Flashcards
Brake band friction material is inspected for?
Burrs, embedded metal particles, severely pitted material, cracks/distortion and flaking.
Brake drums may be reused if there is blue colouring and flaking. T/F
False. Heat checking can lead to failure. So can a large amount of wear, distortion and signs of over heating.
Wear, scratches, nicks and scoring should be checked for on this component?
Piston sealing surfaces.
All disks; friction, clutch and brake, must have 2 tools to be able to measure for what?
Flat surface and feeler gauges to measure for wear, warpage and coning.
Manufacturers recommended procedures will only have scattered information regarding component. T/F
False. Manufacturers recommended procedures will have exact assembly instructions and specifications.
What are 2 ways to check steering and brake clutches during disassembly/assembly?
Feeler gauges and stack height.
Improper clearance in steering and brake discs will cause what to happen?
The discs will drag resulting in over heating. Failure is imminent.
As it is apart anyway, a check on this component should be done.
Bevel gear and shaft.
The service manual will give proper adjustments for these important input devices.
Steering clutch and brake linkages.
In a non-modular track steering machine, the brake valve regulates ____ to the brakes.
Pressure
Like the steering valve, the brake valve regulates pressure in accordance with ____ ____ ____ movement.
Steering control lever
On a machine that is equipped with a steering clutch and brake type steering system,power is delivered to the final drives through the:
steering clutches.
A gradual turn is accomplished on a tracked machine equipped with steering clutchesand brakes by applying the brakes T/F
false;
Applying the track brake and disengaging the same side clutch on a machineequipped with steering clutches and brakes will cause the machine to:
perform a sharp turn.
Steering clutches and brakes are released with the steering control levers in theirnormal position. T/F
false
Clutch is engaged and brakes are released
List two (2) common brake types used in steering clutch and brake equippedmachines.
a) band-type brakesb) multiple-disc, oil bath brakes
Many modern crawler tractors are equipped with modularized steering clutch andbrake assemblies. On these units, the:
brakes and clutches are spring applied.
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:
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.
Caution must be taken when disassembling crawler tractor brake assemblies becausethey contain:
very strong springs
List four (4) friction disc faults that should be noted when performing a visual inspection
a) burrsb) embedded metal particlesc) severely pitted friction materiald) cracks and distortion
A flat surface and a set of feeler gauges are required when checking clutch and brakediscs for
warpage and cone.
If steering clutch and brake linkages are out of adjustment, the clutches and brakesmay not fully apply or release.T/F
true
What are 5 visual inspections you should make
1) Power train oil level and condition
2) Leakage
3) Control linkage condition and adjustment
4) Condition and adjustment of tracks
5) Check filters
What are you looking for while inspecting the control linkages
Inspect for bent or damaged components, ensure that the linkage operates smoothly with no binding and that the linkage is correctly adjusted.
