Cub Cadet Yanmar 3TNV72 - Manual (Page 174)

FUEL SYSTEM
TNV IDI Service Manual 7-13
Fuel Injection Pump
4. Remove the fuel return hose from the fuel
return fitting on the fuel injection pump.
5. Carefully remove the fuel return line assembly
(Figure 7-6, (3)).
6. Remove and discard the copper gasket
(Figure 7-6, (1)) from each fuel injector.
7. Plug or cap all openings to minimize leakage
and prevent contamination.
Installation of Fuel Return Line
1. Install a new copper gasket on each fuel
injector.
2. Carefully reinstall the fuel return line assembly.
3. Reinstall and hand-tighten the fuel return line
nuts.
4. Tighten the fuel return line nuts to the specified
torque. See Special Torque Chart on page 7-7.
5. Reinstall the fuel return hose.
6. Reinstall the high-pressure fuel injection line
assembly. See Installation of High-Pressure
Fuel Injection Lines on page 7-12.
FUEL INJECTION PUMP
Removal of Fuel Injection Pump
1. Loosen the cooling fan V-belt.
2. Remove the engine cooling fan guard (if
equipped), engine cooling fan (Figure 7-7, (2)),
spacer (Figure 7-7, (3)) if equipped, V-pulley
(Figure 7-7, (4)) and cooling fan V-belt
(Figure 7-7, (1)).
Figure 7-7
3. Close any fuel valves in the fuel supply line.
4. Place a drain pan under the fuel injection pump
to catch any spillage.
5. Clean the area to keep contaminants from
entering the fuel system.
6. Remove the high-pressure fuel injection lines
as an assembly. See Removal of High-Pressure
Fuel Injection Lines on page 7-11.
7. Disconnect the fuel return lines from the fitting
on the fuel injection pump (Figure 7-8, (1)).
Plug the open ends of the lines to minimize
leakage and prevent contamination.
CAUTION
The fuel return line is a one-piece
assembly. Use care not to bend or twist
the fuel return line.
0000171en
(1)
(4)
(3) (2)
0000163A
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