2013 Texas FFA Area Tractor Technician CDE

Part II: Diagnosis of Components

Presentation Contents

• 20 components

• Make & model provided when applicable

• Appropriate tools provided

• 5 T-F statements per component

1: Connecting Rods

1: Connecting Rods

1. Connecting Rod “A” is made from steel.

2. Connecting Rod “B” is made from aluminum.

3. Connecting Rod “B” shows signs of overheating.

4. Connecting Rod “B” shows signs of galling.

5. Connecting Rod “B” is suitable for continued use.

2: Crankcase Oil & Container

• DO NOT SHAKE OIL SAMPLE!!!

• Round Magnet

2: Oil Sample & Container

6. 10W-30 is a single grade motor oil.

7. API service is labeled “LE” on the container.

8. Oil sample is contaminated with water.

9. Oil sample is contaminated with metal.

10. Oil sample is suitable for continued use.

3: Thermostat & Gasket

• Perform visual inspection

3: Thermostat & Gasket

11. Gasket has never been installed.12. Gasket requires additional sealant.13. Gasket should be returned to service.14. Thermostat opens at 180 degrees

Fahrenheit.15. Corrosion has caused a seep hole in the

thermostat.

4: Camshaft

• Kubota Diesel• Perform visual

inspection

4: Camshaft

16 Camshaft is for a 3 cylinder engine.17 Camshaft gear shows excessive wear.18 Journal marked “B” shows signs of

galling.19 Cam lobes exhibit excessive wear.20 Camshaft should be returned to

service without repair.

5: Piston Ring

• Ford Ring

• Review ring for wear and abnormalities

5: Piston Ring

21 This is an example of a high compression piston ring.

22 The ring is bent, and should not be repaired.

23 Function of this ring is to apply oil to the cylinder wall.

24 Ring shows excessive wear and/or damage from disassembly.

25 Ring should be returned to service.

6: Valve

• John Deere 8520• Perform visual

inspection

6: Valve

26 Valve is an intake valve.27 Valve shows carbon build up.28 Valve face indicates heavy wear.29 End of valve stem shows excessive

wear.30 Valve should be returned to service

without repair.

7: Piston Assembly

• Visually inspect components

7: Piston Assembly

31 Piston shows signs of galling.32 Piston shows damage as a result of metal

fragments inside cylinder.33 Piston shows signs of overheating.34 A problem exists between the wrist pin &

connecting rod.35 Piston, connecting rod and wrist pin are

suitable for continued service.

8: Coolant

8: Coolant36 Maximum freeze protection is a mixture of 70%

antifreeze and 30% water.37 As per label, this coolant does not contain ethylene

glycol.38 Given cooling system capacity is 10 quarts. Four

quarts of antifreeze is required to protect to a temperature of minus 12 degrees Fahrenheit.

Test coolant sample:36 Coolant provides protection to minus 20 degrees

Fahrenheit.37 Coolant provides boil over protection to 262

degrees Fahrenheit.

9: Sleeve

• Visually inspect component

• Tools: telescoping gauge and micrometer

• Line marked on sleeve for location of measurement

9: Sleeve

41 This is an example of a dry sleeve.42 A ridge has formed as the result of the

piston at the top of the sleeve.43 Average internal diameter at position A is

4.971 inches.44 Average internal diameter at position A is

3.971 inches.45 Piston is suitable to return to service without

repair.

10: Fuel Filter

• Review filter labels• “gasoline poured

into filter to produce recognizable gasoline odor”

10: Fuel Filter

46 Maximum flow of filter is 18 gallons per minute.

47 Filter gasket requires lubrication prior to installation.

48 Filter should be tightened by hand 1 and ¾ turns after gasket contacts flange surface.

49 Filter has been used in a gasoline engine.50 Filter and gasket are both suitable for

continued use.

11: Wiring Diagram

• Ford 5610• Review diagram

11: Wiring Diagram

51 Item # 21 & 22 are speakers that are attached to a cd player/radio.

52 Item # 4 has 2 bulbs in a single housing.

53 Item #23 is the clock and is grounded to the chassis with a purple wire.

54 The windscreen wiper motor grounds to the frame through the cab harness connector.

55 The green wire that feeds the wiper motor also feeds the clock.

12: Fuel pump

• Case/New Holland• Visually inspect

component

12: Fuel pump

56 This injector pump was removed from a 4 cylinder engine.

57 Item #1 is the fuel shut off solenoid.

58 Item #2 is used for the throttle “wide open” adjustment.

59 Item # 3 is used to adjust engine/pump timing.

60 Injector timing should be adjusted with engine running @ 1000 rpm.

13: Electrical Components

• Various applications• Review objects

13: Electrical Components

61 The item labeled “A” is a diode trio and requires 3 tests locations to diagnose.

62 The item labeled “B” is a rectifier bridge and requires 12 test locations to diagnose.

63 The item labeled “C” is an armature.64 The item labeled “D” is stator.65 The rotor has an open circuit .

14: Bearings

• Inspect each bearing and/or component

14: Bearings66 Bearing “A” is a plain or friction bearing, that can support radial

and axial loads both.

67 Bearing “D” is an antifriction bearing that can support radial and axial loads both.

68 Bearing “B” is a friction bearing that uses a clamp fit for installation.

69 Bearing “C” is a friction bearing that has seized and spun in the connecting rod cap.

70 The bearing race shows excessive wear due to corrosion or metal fatigue and should be replaced.

15: Assorted Tools

15: Assorted Tools

71 The tool labeled “A” is used to clean piston ring grooves.

72 The tool labeled “B” is used to remove 1/4”, 6 point nuts and bolts.

73 The tool labeled “C” is used to align clutch disks during installation of pressure plate.

74 The tool labeled “D” are used to crimp solderless wiring terminals.

75 The tools labeled “E”, “F” & “G” are all used to remove broken fasteners.

16: MSDS Sheet

• MSDS Sheet

16: MSDS Sheet

76 According to the MSDS sheet, ULSD is identified as a Toxic, Combustible liquid.

77 The flammability rating of the ULSD is “Extreme.”

78 According to the First Aid measures, if ULSD is ingested, vomiting should be induced.

79 According to the MSDS sheets, the supplied gloves are acceptable as hand protection.

80 According to the MSDS sheets toxicological information, repeated over exposure can cause liver & kidney damage.

17: Turbo Charger

• Inspect Holset turbocharger

• Specifications sheet

17. Turbocharger

81 This turbo charger is a model HX35 that is manufactured for Holset.

82 The turbo charger is an exhaust gas driven air compressor.

83 The turbo charger uses engine coolant to prevent bearing and shaft overheating.

84 In the event that the turbine blades become damaged, it is acceptable to straighten them.

85 The bearing clearance for axial movement is within specifications.

18: Belts

• John Deere Tractors• Specification Sheets

18: Belts

86 Belt “A” is a “V type belt.

87 Belt “B” is a “serpentine” or “V- ribbed” type belt.

88 Belt A is 26 inches long.

89 Belt “C” shows signs of excessive damage and should be replaced.

90 Belt “B” shows signs of excessive damage and should be replaced.

19: Operator’s Manual

• JD Manual

19: Operator’s Manual

91 John Deere 5000 series tractors should have the fuel filter replaced at every 500 hours.

92 According to the Operators manual pg 145-3, Engine break in oil should be changed after the first 75 hours.

93 The operators manual states that the “TOE-In should be adjusted to 1/8” to ¼”.

94 According to page 80-3 of the operator’s manual, flood lamps should never be used while transporting the tractor due to the hazard of confusing drivers approaching the tractor from the rear.

95 The purpose of the operator’s manual is to learn how to operate and service ALL equipment correctly.

20: Hydraulic Pump

• John Deere 420• Tool: feeler gauge• Specifications

sheets, service manual

20: Hydraulic Pump

96 The oil pump is driven by the cam gear.

97 The needle bearings should be removed, inspected and reinstalled to ensure continued service.

98 The pump gears are interchangeable and can be replaced.

99 The oil pump shows major damage and is not suitable for continued service.

100 The pump cover bolts should be torqued to 24 to 28 ft. lbs.

Credits

• Thank you to Rick Elmore, Dr. Doug Kingman, and the “crew” of professionals for working with this CDE.

• Area Components used at:– TSTC Waco, TX– SHSU Huntsville, TX– WTAMU Canyon, TX

ACKNOWLEDGEMENTS

Kirk Edney, IMS, developed the initial presentation

SHSU provided the content and text