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.
7.
8.
9.
10.
10W-30 is a single grade motor oil.
API service is labeled “LE” on the container.
Oil sample is contaminated with water.
Oil sample is contaminated with metal.
Oil sample is suitable for continued use.
3: Thermostat & Gasket
• Perform visual
inspection
3: Thermostat & Gasket
11.
12.
13.
14.
Gasket has never been installed.
Gasket requires additional sealant.
Gasket should be returned to service.
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
27
28
29
Valve is an intake valve.
Valve shows carbon build up.
Valve face indicates heavy wear.
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: Coolant
36 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: Bearings
66
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