TROUBLESHOOTING OPERATION
3-126
TROUBLESHOOTING 0.
WHEN MACHINE RUNS OUT OF FUEL 0.
When starting the engine after running out of fuel, fill the fuel tank with fuel, then fill the fuel strainer and fuel filter
cartridge with clean fuel and bleed the air from the fuel system.
Always watch the fuel level and be careful not to run out of fuel.
If the engine has stopped because of lack of fuel, it is necessary to use the priming pump to bleed the air com-
pletely from the fuel circuit.
PROCEDURE FOR BLEEDING AIR 0.
CAUTION
! This engine consists of higher precision parts than on the conventional fuel injection pump and noz-
zle, so if dirt gets in, it will cause problems. If there is any dirt stuck to the fuel line, use fuel to wash it
off completely.
! Be careful when opening the air bleed plug at the fuel filter head and the air bleeder of the supply
pump. The system is still under pressure and fuel may spurt out.
1. Remove fuel strainer (1), fill the inside of the strainer with
clean fuel, taking care not to let dirt or dust get in, then
install it again.
2. Remove fuel filter cartridge (2), fill the inside of the filter with
clean fuel, taking care not to let dirt or dust get in, then
install it again.
Add fuel from small hole (A) (dirty side) at eight places. Do
not add fuel from hole (B) (clean side) at the center.
If clean fuel is not available, go on to Step 3.
3. Loosen air bleed plug (3) at the fuel filter head.
4. Loosen the knob of priming pump (4), then pump the knob
until no more bubbles come out of air bleed plug (3).
5. Tighten air bleed plug (3).
Tightening torque: 7.8 to 9.8 N²m (0.8 to 1 kgf²m, 5.8 to 7.2
lbft)
6. Loosen air bleeder (5) of the supply pump.
7. Pump priming pump (4) approx. 90 - 100 times until no
more bubbles come out with the fuel from air bleeder (5),
then tighten air bleeder (4).
Tightening torque: 4.9 to 6.9 N²m (0.5 to 0.7 kgf²m, 3.6 to
5.1 lbft)
8. Continue pumping (approx. 50 times) until the priming pump (4) becomes stiff and the overflow valve release
sound becomes continuous.
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