8) Injection quantity adjustment
When adjusting the TC(S) HD type
pump’s fuel injection quantity, operate
the pre-stroke actuator with the pre-
stroke set as specified.
(1) Turn the ‘Normal-Act OFF’ switch to
the ‘Normal” position and rotate the
target dial to set the sensor output to
2.62
L
0.01 V, corresponding to a pre-
stroke of 4.0
L
0.05mm.
(2) Then, adjust the fuel injection quanti-
ty until the specified quantities ard
obtained at the specified pump speed
and in the specified control rod posi-
tion.
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EA2M4017
(3) If not as specified, loosen the injec-
tion pipe, loosen the two nuts fixing
the plunger barrel’s flange, and then
turn the flange right or left to adjust
the injection quantity.
Note : When the sleeve flange is
turned as shown in the figure
at left (right helix plunger), the
injection quantity increases.
EA2M4021
(4) Idling fuel quantity confirmation
Rotate the target dial to set the sen-
sor output to V=V
1
+0.05
L
0.01 V, cor-
responding to a pre-stroke of 6.3
L
0.03mm,and then check the idling
fuel quantity.
(5) When the variation between each
cylinder’s injection quantity satisfies
the specified value, tighten the flange
fixing nuts to the specified torque.
Specified torque :
39~44 N•m(4~4.5 kgf•m)
EA2M4022
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