Doosan DX60R Shop Manual page 379

Reassembly of Fuel Injectors
1. Secure the injector in a soft-jawed vise with the nozzle end
up.
2. Reinstall the shims, nozzle spring, nozzle spring seat,
valve stop spacer, nozzle valve, and nozzle body.
3. Reinstall the nozzle case nut. Tighten it to specification.
See "Special Torque Chart" on page -174
Installation of the Fuel Injectors
4-Valve Cylinder Head
1. Reinsert a new nozzle seat (6, Figure 295) and nozzle
protector (5, Figure 295) in the cylinder head for each
injector.
2. Reinstall a O-ring on to each injector body.
3. Reinsert each fuel injector (4, Figure 295) into the cylinder
head.
4. Reinstall the fuel injector retainers (3, Figure 295) and
torque the retaining bolts (2, Figure 295) to specification.
5. Reinstall the fuel injector return line assembly using new
gaskets on each side of the injector line screws.
6. Reinstall the fuel high-pressure fuel lines to each injector
and tighten the nuts using a "line" or "flare nut" wrench.
7. Prime the fuel system. See "Priming the Fuel System" on
page -40
8. Operate the engine and check for fuel and coolant leaks.
Fuel Injection System (for a Four-Valve Cylinder Head)
Fuel injection system (for a four-valve cylinder head) The fuel
injection system for a four-valve cylinder head is different, not
only in the nozzle valve specifications, but also in the nozzle
holder specifications. Therefore, it is marked as follows; take
care not to install a wrong part when replacing it with new one.
Identifying the fuel injector assembly
Engine
Figure 295
106.8
4TNV94-Z, -E ldentification
groove : two
Figure 296
FG010631
SP001693
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