Ng Leakage Check; Ng Fuel Tank Check; Ng Regulator Check; Ng Line Check - Kubota WG1903-G-E3 Operator's Manual

BNG
[WG1605-N-E3 / WG1605-LN-E3 / WG1903-N-E3 /
WG1903-LN-E3 /WG2503-N-E3 / WG2503-LN-E3 /
WG3800-N-E3 / WG3800-LN-E3]
1. Use Commercial Natural Gas (include CNG).
2. Consult Kubota from further info of fuel used.
NORTH AMERICA ONLY - For wellhead gas usage,
please look at "Application Manual" or "Workshop
Manual".
A Be sure that fill up valve and the withdrawal valve.
A Be sure that CNG hose is connected with the
withdrawal valve.
A Be sure that CNG tank is placed firmly not to move by
machine vibration. (See "fuel system and diagrams"
section)
A Filters that remove 99% of solids such as abrasive
silicates-dirt, rust-scale, metallic shavings or welding
debris from piping and fittings must be used to remove
particulates larger than 1 micron from fuel before it
enters the engine fuel system.
A Coalescing filters must be used whenever liquids i.e.
water, hydrocarbons or sulfur-Hydrogen Sulfide (H2S)
are present in fuel. Removal of these liquids is
essential to prevent poor engine performance and
detonation. Excessive levels of Total Sulfur and H2S
will result in damage to internal parts and components
of the engine by creating sulfuric acid when mixing
with moisture inside the engine. Drain valves for
trapped liquids on coalescing filters are to be
automatic and have recovery vessel to prevent
trapped liquids from being spilled on the ground or
ingested back into the engine. Filters must be
maintained according
recommendation in order to achieve rated filtration
levels.
A DO NOT USE fuels that have total sulfur content
greater than 11.4 mg/m
Hydrogen Sulfide (H2S) content greater than 6 ppmv.
A If it is not known when the engine will be run next or
will not be run for an extended period of time, it is
required to clear residual gas from the engine.
Residual gas may damage the engine components
through corrosion especially if there is any presence
of sulfur (e.g. sulfur may be present in wellhead gas).
Also, if the engine has been emergency stopped or
unexpectedly stopped while running, clearing the
engine of residual gas for safety is mandatory. Shut off
fuel supply, disconnect or disable the lock off valve
and unplug all ignition coils and crank over engine for
8 seconds and rest, two times in a well ventilated area,
in order to clear the residual gas. Failure to do so
could result in unexpectedly igniting residual gas in
the intake or exhaust systems, which can be
dangerous.
the filter manufacturer's
(0.5/100 grain/ft ) or
PERIODIC SERVICE
BNG leakage check
[WG1605-N-E3 / WG1605-LN-E3 / WG1903-N-E3 /
WG1903-LN-E3 / WG2503-N-E3 / WG2503-LN-E3 /
WG3800-N-E3 / WG3800-LN-E3]
To avoid personal injury or death:
A Never test for gas leaks with a flame.
Turn on the gas at low idling rpm and use a soap solution
or equivalent to check all connections for leaks between
NG supply source and D-EPR.
Bubbles will indicate a loose connection.
BNG fuel tank check
[WG1605-N-E3 / WG1605-LN-E3 / WG1903-N-E3 /
WG1903-LN-E3 / WG2503-N-E3 / WG2503-LN-E3 /
WG3800-N-E3 / WG3800-LN-E3]
Check that CNG fuel tank is installed firmly.
Be sure that the valve of the NG fuel supply can be
opened and closed easily.
BNG regulator check
[WG1605-N-E3 / WG1605-LN-E3 / WG1903-N-E3 /
WG1903-LN-E3 / WG2503-N-E3 / WG2503-LN-E3 /
WG3800-N-E3 / WG3800-LN-E3]
Check the hot water lines are not leaking (when used).
BNG line check
[WG1605-N-E3 / WG1605-LN-E3 / WG1903-N-E3 /
WG1903-LN-E3 / WG2503-N-E3 / WG2503-LN-E3 /
WG3800-N-E3 / WG3800-LN-E3]
Be sure that a suitable NG fuel system dependent on NG
fuel supply is installed.
The related parts and the method of installation should be
approved for NG used and confirming to local regulations
and all other standards.

ENGINE OIL

To avoid personal injury or death:
A Be sure to stop the engine before
checking and changing the engine
oil and the oil filter cartridge.
A Contact with engine oil can damage
your skin. Put on gloves when using
engine oil. If you come in contact
with engine
immediately.
A Be sure to inspect the engine, locating it on a level
place. If placed on gradients accurately, oil quantity
may not be measured.
21
oil, wash it off