8 minute read
ELECTRICAL
Refer to the schematic drawing for the following questions. 56 To get the header to raise when the engine is running: A The Lower Primary Spool must shift to the left B The Raise Primary Spool must shift to the left C B, D, and E must happen in order D The Raise Secondary Spool must shift to the left E The Load Check and Signal Checks must open
57 What holds the head up in the neutral position? A Thermal Relief Valve B The Raise Secondary Spool C The Load Check D The Lower Secondary Spool E A, C and D
58 To get the header to lower when the engine is running: A The Lower Primary Spool must shift to the left B A and D must happen in order C The Raise Primary Spool must shift to the left D The Lower Secondary Spool must shift to the left E The Load Check must open
59 The lower secondary spool is: A Pilot operated B Normally closed C Normally open D Solenoid operated E Both A and B
60 The raise secondary spool is: A Pilot operated by the Lower Primary Spool B Pilot operated by the Raise Primary Spool C Both B and D D Spring biased to the right
61 The optional accumulator valve is: A Spring loaded B Pilot operated by the Raise Secondary Spool C Normally closed D Both A and C
2300 Series Axial Flow Combines
Reference the hydraulic feeder reverser section
62 List the solenoids that are energized when using the hydraulic feeder reverser?__________________________________________________ Page
63 What component(s) actually does the engaging and disengaging of the hydraulic feeder reverser drive gear?_____________________________
64 Is the speed of the hydraulic feeder reverser limited?________________ How?_____________________________________________________
65 What is different about the Feeder Drive Slip Clutch on hydraulic feeder reverser equipped machines?__________________________________
2300 Series Axial Flow Combines
2300 Series Axial Flow Combines
Write the appropriate term next to the schematic symbols below:
Variable resistor (Potentiometer) Diode Fuse Single Pole Single Throw (S.P.S.T.) Battery Double Pole Double Throw (D.P.D.T.) Lamp Coil (Solenoid) Resistor Diode Module (multiple diodes) Circuit Breaker
1
2
3
4
5
11 6
7
8
9
10
2300 Series Axial Flow Combines
2 Electrical pressure is measured in _______________. A Amperes B Volts C Ohms D Protons Page
3 It is the flow of _______ that accomplishes the work or purpose of a circuit. A Resistance B Current C Voltage D Power
4 Resistance is measured in Ohms (Ω). An auto-ranging digital VOM will sometimes display a ‘k’ or an ‘M’ in front of the Ω. What do the ‘k’ and ‘M’ mean and what is the multiplier they represent?____________________
5 True or False All electrical load components have some resistance value?
7 Where is the Cab Power Relay and what is its amperage rating?
9 Current always seeks the path of _____________. A Best insulation B Most resistance C Least Resistance D None of the above
2300 Series Axial Flow Combines
10 Current that by - passes part of the intended path is called a ___________. A Open Circuit B Short Circuit C High Resistance Circuit D Typical Control Circuit Page
11 True or False Circuit relays are located in two main areas on 1999 and later built machines. Where are the relays located?__________________________________ What about 1998 and earlier built machines?______________________
12 What is a feed back module?___________________________________
13 What are the three primary areas of instrumentation?
14 True or False The shaft speed monitor will illuminate an outline of the combine whenever the combine is running or the key is in the accessory position.
15 List the nine functions monitored by the Shaft Speed Monitor:
16 With the separator and feeder “ON”, the shaft speed monitor is disabled (turned off) when the engine speed falls below __________RPM.
2300 Series Axial Flow Combines
17 How does the operator set the shaft speed alarm point for the rotor and cleaning fan?_______________________________________________
18 A good, properly operating, reluctance pick up sensor should measure between _____________ and ____________Ω’s of resistance. Page
19 The digital tachometer area has an upper and lower display. List what could be displayed in each area.
20 True or False The operator can access the engine and separator hours with the key in either the “OFF” or “RUN” position.
21 When is the area counter turned “ON” and “OFF” and how does it calculate acres or hectares?___________________________________________
22 What symbols could appear in the Header Height Display?
2300 Series Axial Flow Combines
23 List the five areas of calibration: Page
24 In which calibration procedure can the operator set the “LOW FUEL” Warning Level and what are the two ways it may be set?_____________
25 When Calibrating the Header Controller, should the head be “ON” or “OFF” the combine? Why?_________________________________________
26 What must the operator do to disable (turn off) the Automatic Feeder Cutoff (A.F.C.) and on which model(s) does this function apply?_____________
24 True or False To start the combine, the operator must depress the foot-and–inch pedal, place the propulsion lever in the “NEUTRAL” position, the separator switch in the “OFF” position, and turn the key to “START”.
27 List the three analog gauges on the “A” Post.
28 How many lights should illuminate when the instrument panel/warning lights go through self-test?__________________________________________
2300 Series Axial Flow Combines
29 At what pressure does the Engine Oil Pressure Switch close?_________
30 The hydraulic oil temperature warning light will illuminate at _________°F.
31 True or False The park brake is applied whenever the engine is “OFF” or when the park brake switch is in the “ON “ position.
32 What must be applied at all times to keep the parking brake disengaged?
33 True or False The auxiliary power connector switched and unswitched fuses are supplied with the combine but the operator must install them in the fuse block. Page
34 When adjusting the concave clearance, the lower area of the tachometer will display:_________________________________________________
35 The Header Controller has two standard modes and two optional modes. List them: Standard Modes:____________________________________________
Can a combine be equipped with FLOAT but not AHHC?_____________
37 True or False The instrumentation must be capable of displaying engine RPM’s for the header to operate.
2300 Series Axial Flow Combines
39 The reel has three modes of operation. List them:
40 Where is the Feeder Position Potentiometer and what is it used for?
41 For each of the header modes below, list what the operator will see in the Header Height Display: Manual:____________________________________________________ RTC:______________________________________________________ AHHC:____________________________________________________ Float:______________________________________________________
42 What must the operator do to calibrate the Header Height Display?
43 To return to A.H.H.C., the operator presses the header lower switch for less than _________seconds.
44 What must the operator do to enter FLOAT Mode?
2300 Series Axial Flow Combines
45 List the three solenoids connected to the Header Controller: Page
46 True or False For RTC, AHHC, or FLOAT to function properly, the separator and feeder must be “ON”.
47 What is the S.C.L. (Serial Communication Link)?
48 True or False The Diagnostic Codes allow the operator or technician to troubleshoot the entire electrical system.
49 True or False The S.C.L. has no part in the display of error codes.
50 What alerts the operator that an error has occurred?
51 When operating in A.H.H.C. mode, which components does the Header Controller monitor?___________________________________________
52 If a P3 error code is displayed, what component or circuit should be checked?__________________________________________________
2300 Series Axial Flow Combines
54 How many errors can the diagnostic history review store?_____________
If the diagnostic history is full, what happens to the next error? Page
55 If it is not known when the diagnostic history review was last erased, how many stored error codes should be used to troubleshoot the header controller circuits?____________________________________________
56 Is the separator switch directly wired to the solenoid that engages the separator?_________________________________________________ If not, what is it wired to and what engages the separator?
57 What requirement must be met before the separator will engage?
58 True or False To engage the Feeder Reverser, the operator has to hold the feeder switch rearward and push a button.
59 On model year 2000 and later combines, can the separator be engaged at full throttle?_________________________________________________ Can the change be made to pre 2000 models?_____________________
60 What does the Field Tracker option allow the header to do?
61 What are the three operational modes of the Field Tracker?
2300 Series Axial Flow Combines
62 What is the function of the Feeder Limit Switch? Page
63 Is the Field Tracker Controller needed to operate the system in Manual Mode?____________________________________________________
64 What would the likely customer complaint be if the diode module between the header tilt control and the Signal Valve had blown open (no current path through it)?_________________________________________________
65 What two Pins (terminals) on connector #79 at the Field Tracker Controller always want to agree during the two Automatic Modes?______________ Which Pin tells us “Where we are?”______________________________ Which Pin tells us “Where we want to go?”________________________
66 What does the Unloader Swing Enable Relay prevent from happening?
67 To engage the unloading auger, the operator must:_________________
68 Can the service and sieve lights be illuminates if the seperator is engaged? If not, why not.
69 What must the operator do to turn on the LH and RH side floodlights?
2300 Series Axial Flow Combines
All H.V.A.C. questions refer to MY2000 and later combines 70 List the three modes of H.V.A.C. operations for MY 2000 combines:
71 True or False The H.V.A.C. system has dehumidifying capabilities.
72 When should the cab pressurization motor run?____________________ Page
73 Where does the H.V.A.C. Controller monitor the temperature while operating in the Defog or ATC mode?____________________________
74 How long may it take to stabilize the cab temperature while operating in the ATC mode?________________________________________________
75 What component supplies power to the AC Compressor Clutch?
76 How many sources of power feed the H.V.A.C. circuit?_______________
77 Which component controls the Blower Motor?______________________
78 How does the H.V.A.C. controller position the butterfly in the Heater Valve?
79 When operating in either automatic mode, what happens when the operator rotates the blower speed control potentiometer?
2300 Series Axial Flow Combines
