Kohler KDI 1903M Workshop Manual page 28

2
2.9.6 Electric fuel pump (optional)
When the electric fuel pump is installed in a diesel engine,
one must:
1. Remove any filters installed on the inlet of the
electric fuel pump;
2. Insert a pre-filter between the tank and the electric
pump;
3. The electric pump must be installed on the
application at a height from the minimum tank level
such as to generate a MAX. pressure drop equal to
a column of 500 mm of fuel;
4. Insert a shut-off valve to prevent dry operation due
to the emptying of the intake manifold;
5. The electric pump must guarantee a supply
pressure at the inlet positive in all conditions.
Tab 2.18
POS. DESCRIPTION
1 Fuel tank
2 Arrival pipe from the tank
3 Prefilter
4 Flow pipe from pre-filter to electric pump
5 Electric pump
6 Flow pipe to the fuel filter
7 Fuel filter
2.9.7 Guards for fuel injection circuit components
High-pressure injection circuit components are particularly
sensitive to impurities.
To prevent impurities, even microscopic ones, from
accessing the fuel input or output unions, you are required
to close these accesses by means of specific caps as soon
as the various tubes are disassembled and disconnected.
Disassembly of any component of the injection circuit must
not occur in dusty environments.
Cap guards must remain closed in their housing
until the moment they are to be used.
Pay special attention when using the caps and avoid any
contamination of dust or dirt of any kind.
Even after using the caps illustrated in this paragraph, all
components of the injection circuit must be placed with
care in environments that are free of any type of impurity.
Fig. 2.11 and 2.12 illustrate the caps that must be used on
components of the injection circuit.
EN 28
TECHNICAL INFORMATION
(ST_40)
Fig 2.10
Fig 2.11
Fig 2.12