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62--113625--1
SECTION 5
FUEL SYSTEM
5.1 CHECKING AND ADJUSTING
5.1.1 Injection Timing
1. Remove the fuel speed solenoid.
2. Remove the injection pipes and nozzle.
3. Move the speed control lever to the maximum speed
position.
NOTE
T urn the flywheel with a screwdriver .
4. Turn the flywheel counterclockwise (facing the fly-
wheel) until the fuel fills up the hole of the delivery
valve holder for #1 cylinder.
5. Turn the flywheel further and stop turning when the
fuel begins to flow over.
6. Open the view port on the flywheel bell housing and
read the number on the flywheel. The number indi-
cated is the timing value for the engine. (The flywheel
has a mark ’1TC’ and marks every 5° of engine timing
to 25° total).
Injection Timing
Factory
Specification
0.0568 to 0. 0829 rad.
3.25
° to 4. 75°
B.T.D.C.
NOTE
Injection timing adjustment is accomplished by
adding or removing shims under the injection
pump.
The timing advances byremovingone shimand
retards timing by adding the same shim.
The addition or removal of 0.05 mm (0.0020in.)
of shim, changes the injection timing by approx-
imately 0.009 rad. (0.5°).
Sealant should be applied to both sides of soft
metal gasket shims except for the .0175mm
shim. A .0175mm shim should have sealant ap-
plied to one side only.
When replacing the injection pump be sure to
use the same number and size of new gasket
shims.
5.1.2 Shim Identification
Shims are available in thicknesses of 0.20 mm,
0.25 mm, 0.30 mm, and 0.35mm. Combine
shims for adjustments.
1. Delivery Valve Holder
2. Timing Mark
3. 2--Holes: 0.20 mm s him
4. 1--Hole: 0.25 mm shim
5. 0--Holes: 0.30 mm s him
6. 3--Holes: 0.35 mm s him
7. 2--Holes: 0.175 mm shim