SEBU7899-05 93 Maintenance Section Hoses and Clamps - Inspect/Replace Cooling System Fuel System Pressurized System: Hot coolant can cause seri- ous burns. To open the cooling system filler cap, stop the engine and wait until the cooling system components are cool. Loosen the cooling system pressure cap slowly in order to relieve the pres- sure. Personal injury can result from removing hoses or fittings in a pressure system. Failure to relieve pressure can cause personal in- jury. Do not disconnect or remove hoses or fittings un- til all pressure in the system has been relieved. Personal injury can result from removing hoses or fittings in a pressure system.
Failure to relieve pressure can cause personal in- jury. Contact with high pressure fuel may cause fluid penetration and burn hazards. High pressure fu- el spray may cause a fire hazard. Failure to fol- low these inspection, maintenance and service in- structions may cause personal injury or death. Do not disconnect or remove hoses or fittings un- til all pressure in the system has been relieved. NOTICE Do not bend or strike high pressure lines. Do not in- stall bent or damaged lines, tubes or hoses. Repair any loose or damaged fuel and oil lines, tubes and hoses. Leaks can cause fires. Inspect all lines, tubes and hoses carefully. Tighten all connections to the rec- ommended torque. 1.
Stop the engine. 2. Allow the engine to cool. 3. Before servicing a coolant hose, slowly loosen the filler cap for the cooling system in order to relieve any pressure. 4. Remove the filler cap for the cooling system. NOTICE Do not allow dirt to enter the fuel system. Thoroughly clean the area around a fuel system component that will be disconnected. Fit a suitable cover over any dis- connected fuel system components. 5. Drain the coolant from the cooling system to a level that is below the hose that is being replaced. Drain the coolant into a suitable clean container. The coolant can be reused. 6. Remove the hose clamps. Note:
High-pressure fuel lines may be installed between the high-pressure fuel pump and the fuel injectors. High-pressure fuel lines are constantly charged with high pressure. Do not check the high-pressure fuel lines with the engine or the starting motor in operation. Wait for 10 minutes after the engine stops before you perform any service or repair on high-pressure fuel lines. Waiting for 10 minutes will to allow the pressure to be purged. 7. Disconnect the old hose. 8. Replace the old hose with a new hose. 9. Install hose clamps which have been inspected or install new hose clamps.
Refer to Specifications, SENR3130, “Torque Specifications”, “Hose Clamps” for information about selecting and installing the proper hose clamps. 1. Drain the fuel from the fuel system to a level that is below the hose that is being replaced. 10. Refill the cooling system. 2. Remove the hose clamps. 11. Clean the filler cap for the cooling system. Inspect the gaskets on the filler cap. Replace the filler cap if the gaskets are damaged. Install the filler cap. 3. Disconnect the old hose. 4. Replace the old hose with a new hose. 12. Start the engine. Inspect the cooling system for leaks.