Jacobsen SLF 1880, Technical/Repair Manual

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3D-15
Purging the Fuel System
When the fuel filter is replaced, fuel piping is removed,
the fuel tank is emptied, or the engine has not been
operated for a long time, purge the fuel system of air
using the following procedure.
1. Fill the fuel tank with fuel.
2. Loosen the air vent screw at the top of the filter by
turning counterclockwise two turns. Drain any
excess fuel into a suitable fuel container.
3. Place the ignition switch in the ON position to
energize the electric fuel pump.
4. Allow the fuel to drain from the air vent until air
bubbles no longer appear. Tighten the vent plug.
5. Open the air vent on the fuel injection pump vent
by turning the vent plug approximately two turns
counterclockwise.
6. Allow fuel to flow from the injection pump vent until
air bubbles no longer appear. Tighten the vent
plug (Figure 3D-12).
Figure 3D-12. Injection Pump Vent Plug
7. Inspect the fuel filter, hoses, clamps, and pipes for
leaks. Repair as necessary.
8. Place the ignition switch in the OFF position.
ENGINE REMOVAL
The engine is mounted behind the driver’s seat and
drives the traction pump using a drive shaft. Some
components can be serviced or removed using proce-
dures previously described in this section.
1. Shut off the engine and remove the ignition key.
Allow the engine to cool completely before
attempting to service the engine.
2. Disconnect the negative battery clamp first, then
remove the positive clamp. Remove the battery
hold down clamp and battery.
3. Using a suitable container drain the radiator,
engine block, and engine oil.
4. Remove the upper and lower radiator hoses.
5. Close the fuel filter valve and disconnect the fuel
outlet hose from the filter to the injection pump.
6. Disconnect the throttle cable from the injection
pump and the throttle cable housing from the
clamp.
7. Remove the air cleaner assembly.
8. Remove the exhaust assembly.
9. Tag and disconnect the wiring harness at the fuel
solenoid, starter, oil sender, coolant temperature
sender, and alternator. Remove the harness hold
down and the wiring harness away from the
engine.
10.Remove the drive shaft.
11. Remove the fuel filter mounting bolts and fuel inlet
hose hold down clamps.
12.Using an engine hoist, support the engine and
remove the lower engine mounting bolts.
13.While checking for connected wires and compo-
nents, carefully remove the engine from the
machine. Be careful to support the engine prop-
erly in order to prevent damage.
14.If the engine is being replaced, some components
must be removed and installed on the new engine.
See the parts manual for additional information
and illustrations.
NOTICE
Refer to the engine manufacturer’s manual for addi-
tional information on the fuel system.
Injection Pump Vent Plug