F458166-2 SCREW, MOTOR LEG TO CYLINDER Force
H0202B80L, H0202B81M, H0202H79K, H0202H82N, H0252B83G, H0252H77B, H0252H78C, H0252H78D, H0254H75A, H0306B80C, H0307H81D, H0350H78L, H0351H76K, H0357C86A, H0357C87A, H0357F88A, H0357H83N
SCREW
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Compatible models:
Force entire parts catalog list:
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
- MOTOR LEG » F458166-2
Information:
Recommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 1
Troubleshooting Test Steps    Values    Results    
1. Incorrect Maintenance Intervals and/or Incorrect Oil
A. Use engine oil that is recommended and change the engine oil at the interval that is recommended by the engines Operation and Maintenance Manual.
   
Maintenance Intervals
   
Result: The engine oil was changed at the interval that is recommended by the engines Operation and Maintenance Manual.
Proceed to Test Step 2.
Result: The engine oil was not changed at the interval that is recommended by the engines Operation and Maintenance Manual.
Use at least the minimum grade of Cat oil.
Repair: Change the engine oil at the interval that is recommended. Repair or replace any damaged parts.
   
2. Contaminated Engine Oil
A. Obtain an S-O-S oil analysis. The analysis will contribute to a better understanding of oil contamination.
B. Check the oil filter bypass valve.
If the oil filter bypass valve is open, the oil will not be filtered. Check the oil filter bypass valve for a weak spring or for a broken spring. If the spring is broken, replace the spring. Verify that the oil bypass valve is operating correctly. Refer to the Disassembly and Assembly manual.
Refer to the Caterpillar guidelines for "Reusability and Salvage/Repair" for determining if the replacement of parts is necessary in order to perform a quality repair.
   
Contamination
   
Result: The oil is contaminated.
Repair: Determine the reason for any contamination of the engine oil and make the necessary repairs. Drain the crankcase and refill the crankcase with clean engine oil. Install new engine oil filters. Refer to the engines Operation and Maintenance Manual.
Result: The oil is not contaminated.
Proceed to Test Step 3.
   
3. Low Oil Pressure
A. Engine oil that is contaminated with another liquid can cause low engine oil pressure. High engine oil level can be an indication of contamination. Obtain an analysis of the engine oil.
B. The inlet screen of the suction tube for the engine oil pump can have a restriction. This restriction will cause cavitation and a loss of engine oil pressure. Check the inlet screen on the suction tube and remove any material that may be restricting engine oil flow.
When some components of the engine show wear in a short time, the cause can be a restriction in a passage for engine oil. An indicator for the engine oil pressure may indicate sufficient pressure, but a component is worn due to a lack of lubrication. In such a case, look at the passage for the engine oil supply to the component. Refer to Systems Operation/Testing and Adjusting, "Lubrication System" for additional information.
   
Restriction
   
Result: The inlet tube has a restriction.
Repair: Clear the obstruction. Verify the repair.
Result: The inlet tube does not have a restriction.
Proceed to Test Step 4.
   
4. Leaks in Air System
A. A leak in the air intake system may allow unfiltered air into the engine. Inspect the air intake system for streaks which may indicate a leakage of unfiltered air. Inspect all of the gaskets and the connections.
   
Air Leak
   
Result: There are no air leaks.
Proceed to Test Step 5.
Result: There are air leaks.
Repair: Repair any leaks.
   
5. Inspect the Fuel Filters for Contamination
A. Remove the fuel filters. Inspect the fuel filters for contamination. Contaminants in the fuel such as hydrogen sulfide and sulfur can lead to the formation of acids in the crankcase. Obtain a fuel analysis.
   
Fuel Filters
   
Result: The fuel has contamination.
Repair: Determine the cause of any contamination and make the necessary repairs.
Repair: Install new fuel filters. Refer to the Operation and Maintenance Manual.
   
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 1
Troubleshooting Test Steps    Values    Results    
1. Incorrect Maintenance Intervals and/or Incorrect Oil
A. Use engine oil that is recommended and change the engine oil at the interval that is recommended by the engines Operation and Maintenance Manual.
   
Maintenance Intervals
   
Result: The engine oil was changed at the interval that is recommended by the engines Operation and Maintenance Manual.
Proceed to Test Step 2.
Result: The engine oil was not changed at the interval that is recommended by the engines Operation and Maintenance Manual.
Use at least the minimum grade of Cat oil.
Repair: Change the engine oil at the interval that is recommended. Repair or replace any damaged parts.
   
2. Contaminated Engine Oil
A. Obtain an S-O-S oil analysis. The analysis will contribute to a better understanding of oil contamination.
B. Check the oil filter bypass valve.
If the oil filter bypass valve is open, the oil will not be filtered. Check the oil filter bypass valve for a weak spring or for a broken spring. If the spring is broken, replace the spring. Verify that the oil bypass valve is operating correctly. Refer to the Disassembly and Assembly manual.
Refer to the Caterpillar guidelines for "Reusability and Salvage/Repair" for determining if the replacement of parts is necessary in order to perform a quality repair.
   
Contamination
   
Result: The oil is contaminated.
Repair: Determine the reason for any contamination of the engine oil and make the necessary repairs. Drain the crankcase and refill the crankcase with clean engine oil. Install new engine oil filters. Refer to the engines Operation and Maintenance Manual.
Result: The oil is not contaminated.
Proceed to Test Step 3.
   
3. Low Oil Pressure
A. Engine oil that is contaminated with another liquid can cause low engine oil pressure. High engine oil level can be an indication of contamination. Obtain an analysis of the engine oil.
B. The inlet screen of the suction tube for the engine oil pump can have a restriction. This restriction will cause cavitation and a loss of engine oil pressure. Check the inlet screen on the suction tube and remove any material that may be restricting engine oil flow.
When some components of the engine show wear in a short time, the cause can be a restriction in a passage for engine oil. An indicator for the engine oil pressure may indicate sufficient pressure, but a component is worn due to a lack of lubrication. In such a case, look at the passage for the engine oil supply to the component. Refer to Systems Operation/Testing and Adjusting, "Lubrication System" for additional information.
   
Restriction
   
Result: The inlet tube has a restriction.
Repair: Clear the obstruction. Verify the repair.
Result: The inlet tube does not have a restriction.
Proceed to Test Step 4.
   
4. Leaks in Air System
A. A leak in the air intake system may allow unfiltered air into the engine. Inspect the air intake system for streaks which may indicate a leakage of unfiltered air. Inspect all of the gaskets and the connections.
   
Air Leak
   
Result: There are no air leaks.
Proceed to Test Step 5.
Result: There are air leaks.
Repair: Repair any leaks.
   
5. Inspect the Fuel Filters for Contamination
A. Remove the fuel filters. Inspect the fuel filters for contamination. Contaminants in the fuel such as hydrogen sulfide and sulfur can lead to the formation of acids in the crankcase. Obtain a fuel analysis.
   
Fuel Filters
   
Result: The fuel has contamination.
Repair: Determine the cause of any contamination and make the necessary repairs.
Repair: Install new fuel filters. Refer to the Operation and Maintenance Manual.
   
Parts screw Force:
F12083
F12083 SCREW W/LOCKWASHER
H0033H75C, H0060B76A, H0062H79M, H0064H78D, H0082H76G, H0082H79K, H0092B80G, H0092H79F, H0092H81H, H0092H81J, H0092H83K, H0092H84L, H0094H81F, H0102H76C, H0102H78E, H0122H79E, H0152B78D, H0152H79E, H0152H80F, H0152H81G, H0252H77B, H0252H78C, H0252H78
F12090
F12090 SCREW
H0032H84G, H0033H75C, H0042081C, H0042082D, H0042083E, H0042B78C, H0042B80G, H0042C84L, H0042C87A, H0042H77B, H0042H78D, H0042H78E, H0042H79F, H0043F85A, H0052C88A, H0054H76D, H0252H77B, H0254H75A, H0351H76K, H0356H75F, H0456B78J, H0456B79K, H0456B80
F438165
F438165 SCREW, FUEL BOWL
H0202B80L, H0202B81M, H0202H79K, H0202H82N, H0252B83G, H0252H77B, H0252H78C, H0252H78D, H0254H75A, H0306B80C, H0307H81D, H0350H78L, H0351H76K, H0352H77H, H0352H79L, H0353H78K, H0353H80M, H0353H81N, H0353H82P, H0356H75F, H0357C86A, H0357C87A, H0357C88
F15084
F15084 SCREW
H0202H79K, H0252H77B, H0252H78D, H0254H75A, H0306B80C, H0356H75F, H0456B78J, H0456B79K, H0456B80L, H0503B83A, H0555H74G
F458519
F458519 SCREW, TILLER IDLE STOP FOR MANUAL START MODELS
H0060B78B, H0060H79C, H0060H80D, H0062B78J, H0062H79K, H0067H79C, H0070B79A, H0071H81B, H0071H82C, H0071H83D, H0071H84E, H0072B81D, H0072H79B, H0072H80C, H0072H82E, H0082H78J, H0202B80L, H0202B81M, H0202H79K, H0202H82N, H0252B83G, H0252H77B, H0252H78
F458690
F458690 SCREW, THROTTLE STOP FOR MANUAL START MODELS
H0202B80L, H0202B81M, H0202H79K, H0202H82N, H0252B83G, H0252H77B, H0252H78C, H0252H78D, H0254H75A
F458936
F458936 SCREW, CYLINDER HEAD
H0202B81M, H0202H79K, H0202H82N, H0252B83G, H0252H77B, H0252H78C, H0252H78D, H0254H75A, H0257F88A, H0257F88B, H0306B80C, H0307H81D, H0350H78L, H0351H76K, H0355D89A, H0356F89B, H0357C86A, H0357C87A, H0357C88B, H0357F88A, H0357H83N
F458693