Iterlube Inspection And Maintenance Flashcards
What is recognized as an efficient, simple, and consistent method of creating and delivering power?
Fluid under pressure
Example sentence: Hydraulics is recognized as an efficient method of creating power.
What does flow equal to in hydraulics?
Speed
Example sentence: Flow in hydraulics is equal to speed.
What is the function of the pump in hydraulics?
To create flow
Example sentence: The function of the pump in hydraulics is to create flow.
What creates pressure in hydraulics?
Resistance to flow
Example sentence: Resistance to flow creates pressure in hydraulics.
What are the two sub-systems in hydraulics?
Fifth Wheel Boom Lift and Power Steering
Example sentence: The two sub-systems in hydraulics are Fifth Wheel Boom Lift and Power Steering.
What do the Fifth Wheel Boom Lift and Power Steering share in hydraulics?
Reservoir, return filter & hydraulic fluid
Example sentence: The Fifth Wheel Boom Lift and Power Steering share the reservoir, return filter, and hydraulic fluid.
What type of pump is a PARKER Pump in hydraulics?
Not painted, with priority valve located on the outside of the pump
Example sentence: The PARKER Pump in hydraulics is not painted and has a priority valve located on the outside of the pump.
What is the lift capacity of the 5” cylinder in the Fifth Wheel/Boom Lift sub-system?
70,000 lbs
Example sentence: The lift capacity of the 5” cylinder in the Fifth Wheel/Boom Lift sub-system is 70,000 lbs.
Where is the lift control valve located in the Fifth Wheel/Boom Lift sub-system?
On the left inside frame rail behind the cab
Example sentence: The lift control valve in the Fifth Wheel/Boom Lift sub-system is located on the left inside frame rail behind the cab.
What is the maximum pressure of the relief cartridge for the 5” cylinder in the Fifth Wheel/Boom Lift sub-system?
2000 psi
Example sentence: The relief cartridge in the Fifth Wheel/Boom Lift sub-system has a maximum pressure of 2000 psi for the 5” cylinder.
How should the pressure be adjusted in the Fifth Wheel/Boom Lift sub-system?
Using a ratchet, 3” extension, and a 1-1/16 deep socket to remove the adjuster cap. Use a 5/16 allen wrench to turn the adjustment screw ¼ at a time. Turn clockwise to increase pressure. Pressure should be set to 2000 psi.
Example sentence: Pressure adjustment in the Fifth Wheel/Boom Lift sub-system should be done using specific tools as described.
What does flowing oil cause in a hydraulic system?
Motion
Example sentence: Flowing oil in a hydraulic system causes motion.
What powers the control valve in a hydraulic system?
The pump
Example sentence: The pump powers the control valve in a hydraulic system.
What is the purpose of a priority valve in a hydraulic pump?
To direct flow between the boom and steering, with steering taking priority in case of valve failure.
Example sentence: A priority valve in a hydraulic pump directs flow between the boom and steering, with steering taking priority in case of valve failure.
What is the function of the cab tilt system?
To tilt the cab using either manual or electric over hydraulic methods.
Example sentence: The cab tilt system functions to tilt the cab using manual or electric over hydraulic methods.
What is the function of the tilt motor in the cab tilt system?
Power up and power down the cab.
Example sentence: The tilt motor in the cab tilt system powers up and powers down the cab.
What is the function of the cab hold down latch in the cab tilt system?
To receive oil at the same time as the lift cylinder, requiring less pressure to open and therefore opens first.
Example sentence: The cab hold down latch in the cab tilt system receives oil at the same time as the lift cylinder and opens first.
What is the safety feature of the tilt cylinder in the cab tilt system?
Safety prop to prevent the cab from falling in case of a failure.
Example sentence: The tilt cylinder in the cab tilt system has a safety prop to prevent the cab from falling in case of a failure.
What is the recommended procedure for adjusting boom relief pressure in the Fifth Wheel/Boom Lift sub-system?
Lower boom completely, shut off engine, and toggle the control lever several times to relieve pressure. Insert a 3000 psi gauge into the tap location.
Example sentence: The recommended procedure for adjusting boom relief pressure in the Fifth Wheel/Boom Lift sub-system involves specific steps as described.
What should be done if the boom is still slow to lift in the Fifth Wheel/Boom Lift sub-system?
Install a steering analyzer between the pump and control valve to check flow rates.
Example sentence: If the boom is still slow to lift in the Fifth Wheel/Boom Lift sub-system, installing a steering analyzer between the pump and control valve can help check flow rates.
What does pressure indicate in a hydraulic system?
Force
Example sentence: Pressure in a hydraulic system indicates force.
What is the working pressure in a hydraulic system?
Pressure required to complete the job, which rises to meet the load.
Example sentence: Working pressure in a hydraulic system rises to meet the load and complete the job.
What is the major link between two of the three hydraulic system components?
The hydraulic pump
Example sentence: The hydraulic pump is the major link between two of the three hydraulic system components.
What type of fluid is used in the hydraulic system?
Dexron 3
Example sentence: Dexron 3 fluid is used in the hydraulic system.
What are the two brands of hydraulic pumps mentioned?
Danfoss and Parker
Example sentence: Two brands of hydraulic pumps mentioned are Danfoss and Parker.
What receives oil at the same time?
The cab hold down latch and lift cylinder
The latch requires less pressure to open and therefore opens first.
What does the tilt cylinder have to prevent the cab from falling?
A safety prop
In the event of a failure.
How do you adjust Boom relief pressure?
Start engine and raise boom, continue to hold lever up and read the gauge pressure. This is relief pressure. If pressure needs adjusted - lower boom and toggle lever to relieve pressure. Remove cap located below lever fulcrum.
What type of steering systems do off road trucks use?
TRW steering systems
What does the pump deliver to the steering system through?
A dedicated ‘Priority’ valve
Delivers 4 GPM to steering system.
