Fuel Filter-Diesel; Air Filter-Diesel - Bolens DuraTrac DGT 1800 Service Manual

FUEL SYSTEM (Continued)
TYPICAL FUEL FLOW DIAGRAM
-
-
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J
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FUEL
INJECTOR
PUMP
SERVICING
DIESEL ENGINES
=
:-:u,
L..Y "L..Y
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FUEL PUMP
FUEL
1-'
..-.
I-'
FILTER
'--'
Fig. 4-4
FUEL TANK
Fill with a good, clean, fresh,
seasonal grade of diesel fuel.
A
CAUTION
REFUEL OUTDOORS. DO NOT
REFUEL WHILE ENGINE IS
RUNNING. ALLOW ENGINE TO
COOL BEFORE REFUELING
AFTER IT HAS BEEN STOPPED .
Check to see that vent hole in fuel
tank cap is not plugged.
FUEL VALVE
The fuel valve is located under the
fuel tank. This valve must be fully
open for proper operation of the
tractor.
FUEL FILTER (Fig. 4-2)
The fuel filter is a disposable type , in-
line filter, that should be replaced
when dirty or every 400 hours. To
replace, first shut off in-line valve
under fuel tank, then remove filter
from the fuel line. Replace with
Bolens part number 1850128.
BLEEDING AIR FROM FUEL
SYSTEM (Fig. 4·5)
Avoid running out of fuel. This can
put air into the fuel system, which will
then have to be bled out. Air in the
fuel system prevents the engine from
starting.
To bleed the fuel system of a1r, f1rst
turn the ignition switch to "ON". This
will activate the fuel transfer pump.
Next, loosen <1ir vent screw (C) on the
fuel filter, which will allow fuel mixed
with air out of the system (air will vent
out of the system in the form of
"bubbly" fuel).
When bubbles no longer come out of
the vent hole, re-tighten the air vent
screw (C).
Repeat the same procedure at air
vent screw (D) on the fuel filter and
air vent screw (E) on the fuel injection
pump, in that order.
Be sure each air vent screw is re-
tightened before you loosen any
others.
5100 SERIES
TRACTOR
PAGE 4-5 Rev. 10/91
RETURN LINE
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FUEL
TANK
f..~
6:!l
--
~SHUT
OFF
VALVE
"C"
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L
Fig. 4-5
FUEL INJECTION PUMP AND
NOZZLES
DO NOT ATTEMPT REPAIR ON
THESE ITEMS. CONTACT YOUR
NEAREST AUTHORIZED BOLENS
DEALER FOR REPAIRS.
AIR FILTER
Under normal operating conditions,
disassemble and clean air cleaner
element every
1 00
hours and replace
every 400 hours. Do this more often
if extremely dusty or dirty conditions
prevail.
Remove element from air filter
canister. Clean by gently tapping on
the palm of your hand.