Doosan DX60R Shop Manual page 373

Adjusting Fuel Injection Timing
If the timing marks did not align when performing the Checking
Fuel Injection Timing on page 7-27, the following steps must be
performed to properly time the engine.
1. Leave the dial indicator installed in the fuel injection
pump. Do not disturb the reading on the dial indicator.
2. Rotate the flywheel until the target timing mark (1, Figure
285) and the timing reference mark (2, Figure 285) on the
flywheel housing or back plate are aligned.
Do not rotate the crankshaft during the remainder of this
procedure.
3. Note the reading on the dial indicator (1, Figure 286). If the
reading is less than 2.5 mm (0.098 in.), the fuel injection
timing is "retarded". If the dial indicator reading is greater
and than 2.5 mm (0.098 in.), the fuel injection timing is
"advanced".
NOTE: Some model engines require the intake
manifold and fuel injection pump insulator be
removed to access the inner fuel injection pump
retaining nuts.
4. Loosen the nuts fastening the fuel injection pump to the
gear case or front plate. Loosen the rear bracket(s) on the
fuel injection pump.
NOTE:
Loosening the high-pressure injection line nuts
on the fuel injection pump may make rotating
the pump easier.
5. Rotate the fuel injection pump until the dial indicator reads
2.5 mm (0.098 in.).
6. To "advance" the injection timing, rotate the top of the fuel
injection pump away from the engine.
7. To "retard" the injection timing, rotate the top of the fuel
injection pump toward the engine.
8. When the dial indicator reads 2.5 mm (0.098 in.) of pump
plunger lift and the target timing mark on the flywheel aligns
with the reference mark on the flywheel housing orengine
back plate, the injection timing is correct.
9. Tighten the fuel injection pump mounting nuts and rear
bracket(s).
10. Remove the dial indicator and adapter. Replace the plug in
the pump plunger opening and tighten it to specification. If
removed, install the intake manifold and pump insulator.
Tighten the high-pressure
specification. Open the fuel supply valve, remove the
clamp from the fuel return line and prime the fuel system.
Operate the engine and check it for leaks.
Engine
IMPORTANT
injection line
Figure 285
Figure 286
nuts to
SP001693
Page 193