ENGINE
F. FUEL SYSTEM
a. Checking and Adjusting
1) Injection Pump
( A ) Injection Term ( Injection Timing )
1. Remove the injection pipes.
2. Set the speed control lever to the maximum fuel
discharge position.
3. Turn the flywheel counterclockwise (facing the
flywheel) until the fuel flow through to the hole of
the delivery valve holder (1).
4. Turn the flywheel further and stop turning when
the fuel stop to flow, to check the injection timing.
5. If the Fl mark does not align with the mark of the
window on flywheel housing, add or remove the
shim (2) to adjust.
(1) Delivery Valve Holder(2) Shim
NOTE :
• Apply liquid gasket(There Bond 1215 or equivalent)
to the shim, when reassembling.
( R e f e r e n c e )
• The timing advances by removing 0.15mm
(0.006in) of shim and retards by adding one,
approx 0.26rad(1.5
o
) of crank angle.
• Approx 3.6mm(0.142in) of turn at outer rim of
flywheel equals 0.26 rad(1.5
o
) of crank angle.
(B) Delivery Valve Fuel Ti g h t n e s s
1. Remove the injection pipes, glow plugs and the
inlet manifold, and install the pressure tester.
2. With the speed control lever at the fuel injection
position, turn the crankshaft counterclockwise
(facing the flywheel) until the pressure build up to
the fuel injection pressure.
3. Release the pressure in the delivery chamber by
moving down the plunger to bottom dead
center(turn the crankshaft clockwise approx.
1 . 5 7 r a d ( 9 0
o
C) from the FI timing).
4.
If the pressure drop for 5 seconds exceeds the allowable
limit, replace the delivery valve or pump assembly.
5. If the pressure does not built up, replace the pump
element with new one and test again.
3A165, 4A200, 0.31rad, 18
o
C
Injection 4A220 beforeT.D.C
timing 0.35rad, 20
o
C
4A220
beforeT.D.C
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