PUMP GP-WATER 1174956 - Caterpillar

Probable Causes
Lubrication
Valve train componentsRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 1
Troubleshooting Test Steps Values Results
1. Lubrication
A. Remove the valve mechanism cover. Refer to Disassembly and Assembly, "Valve Mechanism Cover - Remove and Install" for the correct procedure.
B. Crank the engine and check the lubrication in the valve compartment. Ensure that there is adequate engine oil flow in the valve compartment. The passages for the engine oil must be clean.
Note: Do not run the engine with the valve mechanism cover removed.
Lubrication
Result: The oil flow to the valve mechanism is insufficient.
Make sure that the passages for the engine oil are clear.
Result: The oil flow to the valve mechanism is OK.
Proceed to Test Step 2.
2. Valve Train Components
A. Check the hydraulic lifters for correct operation. Refer to Systems Operation, Testing, and Adjusting, "Engine Valve Lash - Inspect".
B. Inspect the following components of the valve train for abnormal or excessive wear, straightness, and cleanliness:
-Rocker arms
-Valve bridges
-Pushrods
-Hydraulic lifters
-Camshaft
-Valve stems
-Rocker shaft
Valve train components
Result: A valve train component is worn, bent, or not clean.
Repair or replace the component. Refer to Disassembly and Assembly.
Note: If the camshaft is replaced, new hydraulic lifters must also be installed.
Verify that the repair eliminated the problem.
If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).