- Cracking
- Softness
- Loose clamps
Replace hoses that are cracked or soft. Tighten any loose clamps.
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Do not bend or strike high pressure lines. Do not install 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 recommended torque. Do not attach any item to the high pressure fuel lines. |
Check for the following conditions:
- End fittings that are damaged or leaking
- Outer covering that is chafed or cut
- Exposed wire that is used for reinforcement
- Outer covering that is ballooning locally
- Flexible part of the hose that is kinked or crushed
- Armoring that is embedded in the outer covering
A constant torque hose clamp can be used in place of any standard hose clamp. Ensure that the constant torque hose clamp is the same size as the standard clamp.
Due to extreme temperature changes, the hose will heat set. Heat setting causes hose clamps to loosen. This can result in leaks. A constant torque hose clamp will help to prevent loose hose clamps.
Each installation application can be different. The differences depend on the following factors:
- Type of hose
- Type of fitting material
- Anticipated expansion and contraction of the hose
- Anticipated expansion and contraction of the fittings
Replace the Hoses and the Clamps
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Pressurized System: Hot coolant can cause serious 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 pressure. |
- Stop the engine. Allow the engine to cool.
- Loosen the cooling system filler cap slowly in order to relieve any pressure. Remove the cooling system filler cap.
Note: Drain the coolant into a suitable, clean container. The coolant can be reused.
- Drain the coolant from the cooling system to a level that is below the hose that is being replaced.
- Remove the hose clamps.
- Disconnect the old hose.
- Replace the old hose with a new hose.
- Install the hose clamps with a torque wrench.
Note: Refer to the Specifications, SENR3130, "Torque Specifications" in order to locate the proper torques.
- Refill the cooling system.
- Clean the cooling system filler cap. Inspect the cooling system filler cap's gaskets. Replace the cooling system filler cap if the gaskets are damaged. Install the cooling system filler cap.
- Start the engine. Inspect the cooling system for leaks.