6-4
FUEL SYSTEM
WARNING
Diesel fuel is combustible and can
cause severe personal injury or death. Do not
smoke near fuel tanks or fuel-burning equip-
ment or in areas sharing ventilation with such
equipment. Keep flames, sparks, pilot flames,
electrical arcs and switches and all other
sources of ignition well away. Keep a multi-
class ABC fire extinguisher handy.
Figure 6-3 illustrates how the fuel system is as-
sembled for delivering fuel to and from the fuel injec-
tion system. See the engine Workshop Manual for
fuel injection system service.
Fuel Filter
See DRAINING / CHANGING FUEL FILTER
(Page 4-6) regarding fuel filter maintenance.
Fuel Pump Test
WARNING
Accidental or remote starting can
cause severe personal injury or death. Before
removing an access door or belt guard, discon-
nect the negative (−) cable at the battery to pre-
vent the engine from starting.
First service all of the fuel filters in the system and
repair any restrictions to fuel flow. If fuel delivery still
appears to be weak, test for pump delivery as fol-
lows:
1. Disconnect the fuel return hose from the line to
the supply tank and point the end into a contain-
er of known volume, such as a 1 or 2 liter (quart)
bottle.
2. Prime the genset by pushing the Start/Stop
switch to STOP(Prime) and holding it there for
the duration of the test. It should not take longer
than 1-1/2 minutes to fill a 1 liter container
(2/3 liter per minute).
3. Replace the pump if flow is less than specified.
Fuel Fittings
The genset has bulkhead fittings on either end. For
these fittings use liquid-type pipe thread sealant
Listed as suitable for diesel fuel. Apply the sealant
sparingly to the male threads only.
CAUTION
Excess liquid-type pipe thread seal-
ant or pieces of Teflon-type pipe thread sealant
can plug the engine fuel system. Apply liquid-
type pipe thread sealant sparingly to the male
threads only. Do not use Teflon tape.
Fuel Hose
Replace worn or damaged fuel hose with USCG
TYPE A1 or ISO 7840-A1 fuel hose. The hoses
must be long enough not to rub on the engine oil
pan.
GLOW PLUGS
Refer to the Engine Workshop Manual when replac-
ing the glow plugs (Figure 6-3).
Note:If a glow plug does not come out after un-
screwing it, or the end has broken off, it will be
necessary to remove the engine head. Glow
plugs can swell if preheat voltage is greater than
the nominal 12 or 24 volts, such as when a bat-
tery booster is used for starting.
Redistribution or publication of this document,
by any means, is strictly prohibited.
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