SHAFT-DRIVE 8W4142 - Caterpillar

This procedure covers the following diagnostic code:
Table 1
Diagnostic Trouble Codes for Low Engine Oil Pressure
J1939 Code Description Notes
100-17 Engine Oil Pressure : Low - least severe (1) The Electronic Control Module (ECM) detects that the engine oil pressure is low.
The engine speed is greater than 500 RPM.
If equipped, the warning lamp will come on and the oil pressure lamp will come on.
Do not operate the engine with low oil pressure. Engine damage will result. If measured oil pressure is low, discontinue engine operation until the fault is corrected.
The Electronic Control Module (ECM) monitors the engine oil pressure.Probable Causes
Visible Leaks
Engine oil level
Oil specification
Engine oil filter
Engine oil pressure switch
Engine oil relief valve
Engine oil cooler
Fuel in the engine oil
Piston cooling jets
Engine oil suction tube
Engine oil pump
Bearing clearanceRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 2
Troubleshooting Test Steps Values Results
1. Visible Leaks
A. Thoroughly inspect the engine for oil leaks.
Visible leaks
Result: There are visible oil leaks.
Repair: Repair any leaks.
Result: There are no visible oil leaks
Proceed to Test Step 2.
2. Engine Oil Level
A. Check the engine oil level.
Oil level
Result: The engine oil level is low.
Repair: Fill the oil system to the full mark on the dipstick.
Result: The engine oil level is OK.
Proceed to Test Step 3.
3. Oil Specification
A. Check that engine oil of the correct specification is being used. Refer to the Operation and Maintenance Manual, "Refill Capacities and Recommendations".
Oil specification
Result: An incorrect specification of engine oil is being used.
Repair: Drain the oil system and refill the oil system with engine oil of the correct specification. Refer to Operation and Maintenance Manual, "Engine Oil and Filter - Change".
Result: The engine contains oil of the correct specification.
Proceed to Test Step 4.
4. Engine Oil Filter
A. Remove the engine oil filter. Refer to the Operation and Maintenance Manual, "Engine Oil and Filter - Change".
B. Inspect the engine oil filter for evidence of blockage.
Oil filter
Result: The oil filter is blocked.
Repair: Install a new oil filter. Refer to the Operation and Maintenance Manual, "Engine Oil and Filter - Change" for further information.
Result: The oil filter is OK.
Repair: Install a new oil filter. Refer to the Operation and Maintenance Manual, "Engine Oil and Filter - Change" for further information.
Proceed to Test Step 5.
5. Engine Oil Pressure Switch
A. Ensure that the engine oil pressure switch is operating correctly. Refer to Troubleshooting, "Switch Circuits - Test (Engine Oil Pressure Switch)".
Engine Oil Pressure Switch
Result: There is a fault with the oil pressure switch circuit.
Repair: Make any necessary repairs. Refer to Troubleshooting, "Switch Circuits - Test (Engine Oil Pressure Switch)".
Result: The oil pressure switch circuit is OK.
Proceed to Test Step 6.
6. Engine Oil Relief Valve
A. Inspect the engine oil relief valve for damage.
Damage
Result: The engine oil relief valve is damaged.
Repair: Replace the oil relief valve. Refer to Disassembly and Assembly, "Engine Oil Relief Valve - Remove and Install".
Result: The engine oil relief valve is OK.
Proceed to Test Step 7.
7. Engine Oil Cooler
A. Check the oil cooler for signs of damage or restrictions.
Oil cooler
Result: The oil cooler