MASSEY FERGUSON MF 135 - Fuel System Servicing

1. Drain the fuel from the filter by
loosening the drain cock in the filter base.
2. Unscrew the center bolt and remove
the agglomerator.
3. Remove and discard the old element;
clean the agglomerator with a lint-free rag.
4. Reassemble with new filter element
and new gaskets.
5. "Air-bleed" the fuel system.
"NOTE: Filter element replace-
ment may become necessary more
often in some climatic conditions,
especially in cold weather areas.''
''Air-Bleeding" the Fuel System
_________,,
In order for your Tractor's engine to
function properly and efficient! y, it is nec-
essary that the fuel system be kept CLEAN
and FREE FROM AIR. It will be necessary
to "air-bleed" the fuel system, if: (1) the
fuel tank has been permitted to run dry, ( 2)
the Tractor has not been used for a consid-
erable period of time, ( 3) the fuel filter is
drained or ( 4) any vent plug in the system is
opened.
TO BLEED THE SYSTEM, proceed as
follows: (See Figs. 53, 54, and 55).
1. Loosen the air-vent plug on the fuel
filter. (Fig. 53)
2. Pump the manual lever on the pri-
mary fuel pump (Fig. 54) until air-free fuel
comes out the air-vent plug. Tighten the
vent plug securely. (Fig. 53)
Fig. 54 - Primary Fuel Pump
Fig. 55 - Injection Pump
3. Loosen the lower vent plug on the
injection pump body and operate the primary
pump manual lever until air-free fuel flows
out this port. Tighten the vent plug. (See
Fig. 55.)
4. Loosen the upper vent plug on the in-
jection pump body and operate the primary
pump manual lever until air-free fuel flows
out this port. Tighten the vent plug. (See
Fig. 55.)
5. Operate the primary pump manual
lever an additional 10 times to ensure that
there is fuel in the bleed-back lines to the
filter.
6. Loosen a pressure line at the injec-
tion connection. Turn the engine over with
the starter motor until air-free fuel is pres-
ent at the connections . Tighten the injector
connection.
NITTE: For this operation, the fuel
shut-off control knob must be pushed
in.
7. Turn the engine over with the start-
ing motor until the engine starts.
NITTE: Do not operate the starter
motor continuously for more than
30 seconds without allowing a few
minutes for cooling.
Idle Speed Adjustment (See Fig. 55)
The only adjustment that can be made on
the injection pump is the idle speed adjust-
ment. This can be done by turning the idle
speed stop screw in or out until an idle speed
of 725 to 775 rpm is obtained. It is impor-
tant that the engine idles at this speed.
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