76 SEBU8121
Maintenance Section
Hoses and Clamps - Inspect/Replace
Fuel Tank
Fuel quality is
critical to the performance and to the
service life of the engine. Water in the fuel can cause
excessive wear to the fuel system. Condensation
occurs during
the heating and cooling of fuel. The
condensation occurs as the fuel passes through the
fuel system and the fuel returns to the fuel tank. This
causes water
to accumulate in fuel tanks. Draining
the fuel tank regularly and obtaining fuel from reliable
sources can help to eliminate water in the fuel.
Drain the Water and the Sediment
Fuel tanks should contain some provision for draining
water and draining sediment from the bottom of the
fuel tanks.
Open the drain valve on the bottom of the fuel tank
in order to d
rain the water and the sediment. Close
the drain valve.
Check the fu
el daily. Drain the water and sediment
from the fuel tank after operating the engine or drain
the water and sediment from the fuel tank after the
fuel tank h
as been filled. Allow five to ten minutes
before performing this procedure.
Fill the fu
el tank after operating the engine in
order to drive out moist air. This will help prevent
condensation. Do not fill the tank to the top. The
fuel expa
nds as the fuel gets warm. The tank may
overflow.
Some fuel
tanks use supply pipes that allow water
and sediment to settle below the end of the fuel
supply pipe. Some fuel tanks use supply lines that
take fuel
directly from the bottom of the tank. If
the engine is equipped with this system, regular
maintenance of the fuel system filter is important.
Fuel Storage Tanks
Drain the water and the sediment from the fuel
storage tank during the following conditions:
•
Weekly
•
Oil chan
ge
•
Refill of the tank
This will help prevent water or sediment from being
pumped from the storage tank into the engine fuel
tank.
If a bulk storag
e tank has been refilled or moved
recently, allow adequate time for the sediment to
settle before filling the engine fuel tank. Internal
baffles in the
bulk storage tank will also help trap
sediment. Filtering fuel that is pumped from the
storage tank helps to ensure the quality of the fuel.
When possibl
e, water separators should be used.
i02169460
Hoses and Clamps -
Inspect/Re
place
Inspect all hoses for leaks that are caused by the
following conditions:
•
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 fitti
ngs that are damaged or leaking
•
Outer covering that is chafed or cut
•
Exposedwirethatisusedforreinforcement
•
Outer cove
ring that is ballooning locally
•
Flexible part o f the hose that is kinked or crushed
•
Armoring that is embedded in the outer covering
A constan
t 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
harden. H
ardening of the hoses will cause hose
clamps to loosen. This can result in leaks. A constant
torque hose clamp will help to prevent loose hose
clamps.
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