72936 Mercruiser FUEL LINE, FUEL PUMP TO CARBURETOR

Introduction
The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.Problem
Reports have been received that the engine oil remote filter hose assembly starts to leak approximately around 3000 hours range on the machines listed above.Solution
Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.
Do not operate or work on this engine unless you have read and understand the instructions and warnings in the Operation and Maintenance Manual. Failure to follow the instructions or heed the warnings could result in injury or death. Contact any Caterpillar dealer for replacement manuals. Proper care is your responsibility.
Accidental engine starting can cause injury or death to personnel working on the equipment.To avoid accidental engine starting, disconnect the battery cable from the negative (−) battery terminal. Completely tape all metal surfaces of the disconnected battery cable end in order to prevent contact with other metal surfaces which could activate the engine electrical system.Place a Do Not Operate tag at the Start/Stop switch location to inform personnel that the equipment is being worked on.
Check valves in the hydraulic system may allow pressure to exist in the hydraulic lines after the engine has been stopped. Pressure must be relieved prior to servicing the components of the hydraulic system. Failure to relieve pressure prior to servicing may result in personal injury.
Keep all parts clean from contaminants.Contamination of the hydraulic system with foreign material will reduce the service life of the hydraulic system components.To prevent contaminants from entering the hydraulic system, always plug or cap the lines, fittings, or hoses as they are disconnected. Cover any disassembled components and clean them properly before assembly.Clean the hydraulic system properly after any major component exchange or especially after a component failure, to remove any contamination.
Table 1
Required Parts(1)
Sales Model Qty Part Number Part Name
336 STD and 345 GC 1 513-2230 Hose As
1 513-2231 Hose As
336 GC 1 508-7601 Hose As
1 508-7602 Hose As
(1) Dealer FabricatedIn the event of failure, replace the failed parts with the same part numbers listed in Table 1.For installation of Hose Assembly for 336 STD and 345 GC machines, refer to the below rework procedure "Installation of 336 STD and 345 GC Hose Assembly".For installation of Hose Assembly for 336 GC machines, refer to the below rework procedure "Installation of 336 GC Hose Assembly".Rework Procedure
Installation of 336 STD and 345 GC Hose Assembly
Note: New hose assembly 512-2330 and hose assembly 512-2331 must be fabricated according to the drawing of the parts numbers shown in Illustration 1and Illustration 2 respectively.
Illustration 1 g06564119
(1) 513-2330 Hose As
(1A) 124-2156 Permanent Coupling
(1B) 456-8560 Hose
(1C) 124-2124 Permanent Coupling
(D1) 63.7 mm (2.50 inch)
(D2) 25.4 mm (1.00 inch)
(D3) 770 5 mm (30.3 0.2 inch)
(D4) 370 5 mm (14.5 0.2 inch)
(D5) 590 5 mm (23.2 0.2 inch)
(D6) 810 mm (31 inch)
(D7) 2540 25 mm (100.0 1.0 inch)
Illustration 2 g06564122
(2) 513-2331 Hose As
(2A) 124-2155 Coupling As
(2B) 456-8560 Hose
(2C) 124-2123 O-Ring Face Seal Coupling
(D8) 56.15 mm (2.210 inch)
(D9) 25.4 mm (1.00 inch)
(D10) 725 5 mm (28.5 0.2 inch)
(D11) 445 5 mm (17.5 0.2 inch)
(D12) 630 5 mm (24.8 0.2 inch)
(D13) 670 mm (26.3 inch)
(D14)