Diesel Fuel System - MASSEY FERGUSON MF230 Shop Manual

SERVICE MANUAL
(0.010-0.020 inch). Support rear end
mm
of shaft (not the impeller), place pump
mounting cap screws into holes in hous­
ing, then press pulley hub onto shaft as
84.
shown in Fig. Distance
gasket surface to fan surface of pulley
be 140.5
flange should mm
ches). Make certain shaft assembly
rotates smoothly.
Reinstall water pump by reversing the
removal procedure. Adjust fan belt ten­
sion to provide 13-19 mm
66 (15
deflection with N
applied midway between longest span
between pulleys.
DIESEL FUEL
SYSTEM
The diesel fuel system consists of three
basic units; the fuel tank and filters, in·
jeetion pump and if\iector nozzles. When
servicing any unit associated with the
diesel fuel system, the maintenance of
absolute cleanliness is of utmost impor·
Of
tance. equal importance is the
avoidance of nicks or burrs on any of the
working parts.
FUEL FIL TERS
85.
All Models So Equipped
Models MF230, MF235 and
are equipped with a single fuel filter
{F-Fig. 85). 1\vo fuel filters, a primary
and secondary, are used on Models
MF250. A
MF240 and glass sediment
bowl is located at the bottom of the
primary or single filter element. Bowl
should be inspected and any dirt or
water accumulation drained daily. If
substantial amount of water or other
contamination is evident, source of con·
tamination should be found and cor·
rected.
Manufacturer recommends renewing
fuel filter element(s) after every
hours of operations or annually,
whichever comes first. Filter elements
should also be renewed if loss of engine
power or uneven running is noticeable
regardless of hours of operation. Note
that cleanliness of fuel supply has more
eff ect
on the life offuel filters than hours
of operation.
Thoroughly clean fuel f ilter and sur·
rounding area prior to removal. Close
fuel tank shut-off valve. Remove center
cap screw from fuel filter head and
remove filter element. Install new ele·
ment using new gaskets. Open fuel shut·
off valve and bleed air from system as
86.
outlined in paragraph
Be 1ure
(A) from
s tell mounting cep screw•
Fig. 84-DisllJnce (A)
before pressing pulley hub
be 140.5 mm (5.530 Inches).
(5.530
in·
shaft (not the Impeller) and In­
onto
(1/2 to 3/4 inch)
pounds) force
BLEEDING FUEL SYSTEM
'lb
All Models So Equipped
86.
make sw-e fuel shut-off valve is open and
move injection pump shut-ofT control to
"Run" position. Loosen air vent plug
(1-Fig.
operate
free fuel flows from vent. Tighten vent
plug.
NOTE:
crankshaft to
lobe In relation
to allow operation of priming lever.
Loosen vent plug on secondary filter
(if so equipped) and repeat bleeding pro­
cedure. Open vent plugs
MF245
jection pump and operate lift pump
priming lever. Tighten lower plug then
upper plug as air-free fuel flows from
each vent. Note that air in governor
housing relieved by bleed screw
not prevent engine from starting and
running properly; however, condensation
in the trapped air can cause rusting of
governor components and eventual
pump malfunction.
500
Fig. 85-Schematlc
typlcel dleul fuel system
fuel to tank. Two flltera ,,.
showing
In fuel
pump (L) and Infection
(P).
Line
used on
I. Filt.er bleed plut
2
Pump bleed plug
S. Governor
plug
should
to
support end of
shaft.
bleed air from fuel system, first
lift
in
85)
top of filter head, then
pump priming lever until air·
to
It may be necessary to rotate
change
position of camshaft
lift pump actuating arm
3)
(2 and
of fuel flow
filter (F}, li ft
view of
direction
1/nes,
pump
(R) retums exceas
MF240 end MF250.
hou.ling bleed
Paragraphs
so
Loosen Thermostart fuel supply line
(tractors equipped) at intake manifold
and operate lift pump priming lever un­
til fuel flows from the line. Retighten fuel
line connection. If engine f ails to start
at this point, loosen high pressure fuel
line connections at injectors. With hand
throltle in full speed posit ion, crank
engine with starter motor until fuel
flows from the connections. Retighten
fuel line connections and start engine.
THERMOSTART SYSTEM
All Models So Equipped
87.
The Thermostart system is
available as an aid for
starting on late production
tors. The system consi.std of an electrical­
ly actuated heater located in the int..ake
on in·
manifold. The unit heats and ignites
diesel fuel vapor in intake manifold to
warm the air going into the cylinders.
The system is actuated by turning the
(3) starter switch to "Heat" position for
will
to 20 seconds, then turn key to
"Heat/Start" position and crank engine.
After engine struts, key can be returned
to "Heat" position until engine runs
smoothly or for a maximum
8 5· 87
cold
weather
MF250
trac·
15
of
15
37