SECTION 10 - ENGINE
10-67
ADJUSTING THE FUEL INJECTION TIMING
Normally, this procedure provides correct injection
timing. However, when the new injection pump,
camshaft assembly, or cylinder block is used, fuel
injection timing should be adjusted as explained
below.
Reassemble the injection pump according to the
procedures above. Use the shim of 0.5 mm
thickness.
Remove the delivery valve holder at the front side
(radiator side) of the injection pump.
INJECTION TIMING AND CRANKSHAFT
POSITIONS
Engine
Model
Degrees Crank BTDC
X Y Z
Injection
Timing
N844T 21 20 22 20 - 22
N844 22 21 23 21 - 23
Pull out the delivery valve, 1, (IN), and reinstall the
spring, 2, and delivery valve holder, 3.
NOTE: When reassembling the delivery holder,
adjust the location of the delivery valve (OUT) to
correct position using a wire, 4.
108
Move the governor control lever to “Maximum Fuel”
position and send fuel with the No. 1 piston at around
“X” degrees BTDC in its compression stroke. At this
time, fuel flows from the delivery holder.
109
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