COVER GP-VALVE MECHANISM 3236222 - Caterpillar

Table 1
Diagnostic Code for Low Sea Water Pump Pressure
J1939 Code Code Description Comments
2435-17 Seawater Pump Outlet Pressure : Low - least severe (1) The ECM detects that the outlet pressure of the sea water pump is below the trip point for 30 seconds.
The warning lamp is lit and the code is logged.
2435–18 Seawater Pump Outlet Pressure: Low - moderately severe (2) The ECM detects that the outlet pressure of the sea water pump is below the trip point for 30 seconds.
The warning lamp is still lit and the code is logged.
The engine may derate to 50%. Probable Causes
Diagnostic code
Pump inlet blocked
Pump impeller damagedRecommended Actions
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Diagnostic Codes
A. Establish communication between the electronic service tool and the Electronic Control Module (ECM). Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Download the "Warranty Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes.
Diagnostic codes
Result: There are active or logged codes.
Troubleshoot any codes before continuing with this procedure.
Result: A 2435-17 code is active or recently logged.
Proceed to Test Step 2.
2. Check the Inlet Pipe for the Sea Water Pump
A. Disconnect the inlet pipe from the sea water pump.
B. Check the inlet pipe for the following defects:
Blockages
Restrictions
Damage to the pipe
Loose connections
C. Check sea water strainer for blockages, clean is required.
Inlet pipe
Result: The inlet pipe is blocked, restricted, damaged, or loose.
Make all necessary repairs to the inlet pipe.
Confirm that the fault has been eliminated.
Result: The inlet pipe is OK.
Do not reconnect the pipe. Proceed to Test Step 3.
3. Check the Sea Water Pump Impeller
A. Crank the engine by hand and check the sea water pump impeller for damage.
Pump impeller
Result: The sea water pump impeller is damaged.
Replace the impeller. Refer to Disassembly and Assembly, "Auxiliary Water Pump - Disassemble" and Disassembly and Assembly, "Auxiliary Water Pump - Assemble".
Confirm that the fault has been eliminated.
Result: The sea water pump impeller is OK.
Contact the Technical Communicator at a Cat dealer.
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).