TEST LESSON 13 - PART 1 HYDRAULIC LEVELING SYSTEM ...
TEST
LESSON 13 - PART 1
HYDRAULIC LEVELING SYSTEM IDENTIFICATION AND OPERATION
Read questions carefully and refer to the lesson when necessary. Information can be in the lesson text or diagrams.
1. There are basically two different methods the operator controls what jacks do when operating a manual leveling system. What are they?
1._____________________________
2._____________________________
2. What is the main operating feature of the 100 and 110 lever controlled systems? ______
________________________________________________________________________
3. For a 100 series system, there is one relay on the pump to control +12 power to the pump motor. There are normally four jack control levers. How many switches are there on the valve assembly to control the pump relay? _____________
4. What is the difference between the 100 and 110 systems? ________________________
_________________________________________________________________________
_________________________________________________________________________
5. A special 100 series valve is needed when using kick-down style jacks.
True or False ___________
6. Besides having to set the park brake, what operating feature of the 200/210/225 series systems is different from the 100/110 series systems. _____________________________
__________________________________________________________________________________________________________________________________________________
7. The 200 & 210 systems both used a mercury bulb sensing unit. The 210 series level sensing unit is mounted with a different orientation than the 200 series.
True or False ___________
8. The 200/210/225 systems have one relay on the pump like the 100/110 systems. Considering the control of the pump relay, besides having the park brake set, what electrically is different between the 200 systems and the 100 systems? ________________ _________________________________________________________________________ _________________________________________________________________________
9. The 200 series system is a BI-AXIS® leveling system. What does that mean? ___________
__________________________________________________________________________________________________________________________________________________
10. Most manually operated leveling systems use jack-down warning switches and level sensing units. What is the same electrically about both of these components? __________
_________________________________________________________________________
11. What feature does the 200/210/225 systems have that allows the pump to operate? The 100/110 systems do not have this feature. _______________________________________
12. If the park brake is not set with a joystick system, the pump will not run. Which joystick light panel will turn on if the park brake is not set? _________________________
_________________________________________________________________________
13. What position should the OPERATE/STORE levers for the 200 series be in when traveling? _____________________________________________________
14. What are the basic control features of the 4 jack 310 systems? ____________________
_________________________________________________________________________
15. What identifying feature of the touch panel will always identify the system as a “manual” leveling system? ___________________________________________________
_________________________________________________________________________
16. The vehicle has an air suspension. The HWH 310 system controls the air dump system. The touch panel has no DUMP button. What kind of air dump system is used? __________
_________________________________________________________________________
17. Name three components of the 310 series hydraulic manifold. Fittings, plugs, bolts or the block do not count.
1. _____________________________________________________
2. _____________________________________________________
3. _____________________________________________________
18. Without the check valve arrangement in the 310 or 325 style hydraulic manifolds, what can happen when leveling the vehicle? __________________________________________
19. Is the shifting of the shuttle valve controlled with a +12 volt signal or a ground signal?
_________________________________________________________________________
20. A 305 short board system uses a __________________ signal from the touch panel to control relays in the control box that switch a ___________________ signal which will turn on a hydraulic solenoid valve.
21. For all touch panel controlled manual leveling systems, the relay on the pump is controlled with the same type of switched signal. True or False _______________
If the answer is true, what type of signal controls the pump relay? ____________________
22. When a 310 or 305 system touch panel UP ARROW is pushed, the control box must see a ground signal from __________________________________________
______________________ before the jack solenoid valves can open.
23. Put an X by the systems that will allow the control panel to turn on if the park brake is not set. 100 series ____ 110 series ____ 200 series ____ 210 series ____ 310 series ____
310 series with rocker switch panel ____ 305/325 short board ____ 325 long board ____
24. Which two systems do not use a level sensing unit? ____________________________
_______________________________________________
25. A lit yellow level light means part of the vehicle needs to be raised to level the vehicle. How many yellow level lights can be lit at the same time on a 310 touch panel? _________
26. A vehicle has a 200 series light plate. The front of the vehicle and the left side of the vehicle are low. Which, if any, yellow level lights will be on? _______________________
27. Put an X beside the component or components a 210 system does not have.
Joystick ____ Separate light plate ____ Shuttle valve ____ Jack down warning switch ____
Control box ____ ON/OFF rocker switch ____ Green level light ____
28. Put an X beside the component or components a 305 system does have.
Solenoid valve _____ Electronic sensing unit _____ Operate/Store levers _____
Touch panel NOT IN PARK/BRAKE light _____ Control box diagnostic LEDs _____
An activating rod for the micro switch _____ 50 psi manifold pressure switch ______
29. Besides the touch panel, how can you visually tell a 305/325 short board system from the newer 325 long board system? _____________________________________________________
_________________________________________________________________________
30. A vehicle with a 310 rocker switch system has how many jacks? ____________
31. The 305/325 systems and the 325 long board systems have diagnostic LEDs on the control box pc board. Each output relay on the control box pc board has a yellow and red LED. Give a brief explanation of what the yellow and red relay LEDs indicate. _________
__________________________________________________________________________________________________________________________________________________
32. When the STORE button has been pushed, all touch panel systems will turn the touch panel off several minutes after the last touch panel red warning light goes out.
True or False___________
33. Which 2 manual touch panel systems retract the front 2 jacks 5 seconds before starting to retract the rear 2 jacks? _____________________________________
34. Name two things that are common about the +12 travel signal with the 200 systems, the 310 systems, the 305/325 short board systems and the 325 long board systems.
1. ____________________________________________________________
2. ____________________________________________________________
35. Identify the parts in this drawing of a 325 power unit.
[pic]
Bonus 1. The system is a 325 long board system. The right front jack will not extend. The pump runs. The yellow LED for the right front relay comes on when the UP arrow is pushed. The red LED for the right front relay does not come on when the UP arrow is pushed. What would be the first thing you would check? __________________________
________________________________________________________________________
Bonus 2. Which touch panel system will not turn the touch panel off after the “STORE” button has been pushed and the jacks are fully retracted with the red warning lights off?
______________________________________________________
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