i06104305
Fuel Tank Water and Sediment
- Drain
SMCS Code: 1273-543-M&S
NOTICE
Care must be taken to ensure that fluids are con-
tained during performance of inspection, mainte-
nance, testing, adjusting, and repair of the product.
Be prepared to collect the fluid with suitable contain-
ers before opening any compartment or disassem-
bling any component containing fluids.
Refer to Special Publication, NENG2500, “Cat Dealer
Service Tool Catalog” or refer to Special Publication,
PECJ0003, “Cat Shop Supplies and Tools Catalog”
for tools and supplies suitable to collect and contain
fluids on Cat products.
Dispose of all fluids according to local regulations
and mandates.
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. The
fuel tank utilizes a fuel tank vent to prevent an air lock
or vacuum. Ensure that the vent is free of debris and
not damaged.
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.
Prepare to catch water and sediment in an
appropriate container. Connect a hose (if necessary)
to the valve prior to opening the valve.
Open the drain valve on the bottom of the fuel tank in
order to drain the water and the sediment. Close the
drain valve.
Note: Failure to close the drain properly could result
in fuel leakage, which could have detrimental results
to performance.
Check the fuel daily. Drain the water and sediment
from the fuel tank after operating the engine. Drain
the water and sediment from the fuel tank after the
fuel tank has been filled. Allow 5 to 10 minutes before
performing this procedure.
Fill the fuel tank after operating the engine in order to
drive out moist air. This procedure will help prevent
condensation. Do not fill the tank to the top. The fuel
expands as the fuel gets warm. The tank may
overflow.
Some fuel tanks use stand pipes that allow water and
sediment to settle below the end of the fuel stand
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
• Refill of the tank
This procedure will help prevent water or sediment
from being pumped from the storage tank into the
engine fuel tank. A four micron(c) absolute filter for
the breather vent on the fuel tank is also
recommended.
If a bulk storage 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 possible, water separators should be used.
i04723589
Generator - Dry
SMCS Code: 4450-569
Personal injury or death can result from improper
troubleshooting and repair procedures.
The following troubleshooting and repair proce-
dures should only be performed by qualified per-
sonnel familiar with this equipment.
Refer to Safety Section, “Generator Isolating for
Maintenance” for information regarding the
procedure to safely isolate the generator.
If the insulation resistance values are less than the
recommended values, one of the following drying
procedures must be selected. This decision should
be based on the following factors:
• the size of the unit
• the location of the unit
• the equipment that is available
132
SEBU7125-13
Maintenance Section
Fuel Tank Water and Sediment - Drain
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