Name: ______
DTEC 105
Caterpillar 416D Transmission Testing Lab
All questions refer to the school-owned Caterpillar 416D as seen in laboratory
- What is the machine’s serial number? What is the nomenclature of the model?
- Are the synchronizers in the transmission for the gear shifts, direction shifts, or both shifts?
- What shaft are directional shifts made on?
- What shaft are speed shifts made on?
- Explain how/when the lock-up clutch functions in the torque converter.
- When is the stator stationary? Rotating?
- What is the maximum pressure in the torque converter? What component keeps it at that pressure?
- What is the purpose of the two relief valves in the transmission circuit? Why does one have a lower opening pressure than the other?
- The transmission pump is listed as a crescent pump. What style pump is that?
- What circuits does the transmission pump supply oil to?
- Does the transmission drive at transmission input rpm or engine rpm?
- Does oil flow if the transmission filter is plugged? How?
- How is differential pressure used in regards to the transmission oil filter? What is the specification?
- Where does the oil supplied to the oil cooler come from?
- Where is the oil cooler located on the machine?
- What transmission components are pressure lubricated?
- Does our 416D have a Neutralizer Switch? If so, where is it located?
- What is the function of the Neutralizer?
- Prior to performing transmission tests, what should be completed?
- What are the steps to test the transmission oil pump pressure?
- What are specifications and results of thetransmission oil pump pressure test?
- What are the steps to test the torque converter stall?
- What are specifications and results of thetorque converter stall test?
- What are the steps to test the forward clutch pressure?
- What are specifications and results of theforward clutch pressure test?
- What are the steps to test the reverse clutch pressure?
- What are specifications and results of thereverse clutch pressure test?