85
Maintenance Section
Hoses and Clamps - Inspect/Replace
•
Cracking
•
Softness
•
Loose clamps
Replace hoses that are cracked or soft. Tighten any
loose clamps.
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.
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
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.
1. Stop the engine. Allow the engine to cool.
2. 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.
3. Drain the coolant from the cooling system to
a level that is below the hose that is being
replaced.
4. Remove the hose clamps.
5. Disconnect the old hose.
6. Replace the old hose with a new hose.
Note: For torques on hose clamps, see this
Operation and Maintenance Manual, “Torque
Specifications” (Maintenance Section).
7. Install the hose clamps with a torque wrench.
Note: For the proper coolant to use, see this
Operation and Maintenance Manual, “Coolant
Recommendations” (Maintenance Section).
8. Refill the cooling system.
9. 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.
10. Start the engine. Inspect the cooling system for
leaks.
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