Adjustment Of Injection Angle - Volvo MD2010 Workshop Manual

Adjustment of injection angle

Fit the injection pump as per the previous section with
the exception of item 1 which is changed to item 1 be-
low.
1.
Place a shim 0.5 mm (.0196 in) in thickness under
the injection pump flange.
Fig. 88. Fitting of shim
1. Shim
2. Remove the front pressure valve holder from the
i njection pump.
Fig. 89.
1. Pressure valve holder
2. Spring
3. Pressure valve
3. Remove the pressure valve and replace the pres-
sure valve holder.
4. Move the throttle arm to max. position. Turn the
crankshaft clockwise until the piston in cylinder No.
1 moves upwards in the compression stoke and
fuel begins to flow out from the pressure valve (po-
sition X in the table below). The work is simplified if
an approx. 50 mm (2 in) "observation tube" is fitted
on the pressure valve.
4. O-ring
5. Copperwasher
6. Pump element
Use a scrapped fuel pipe. The pipe makes it easier
to see when the fuel begins and stops flowing out
from the valve.
Fig. 90. Marking the pulley and engine block
5. Continue turning the crankshaft slowly clockwise
until the fuel stops flowing out from the pressure
valve holder. Check the position of the crankshaft
to the marking on the pulley and engine block at
this point. See Fig. 90.
If the position is after "Y°" (B.T.D.C.) a thinner
shims should be used under the injection pump
flange. If the position exceeds "Z°" (B.T.D.C.) a
thicker shims should be fitted instead. (See table
below).
Engine Pos. of crankshaft in °
model
X Y
MD2010 30,0 24,5 26,5
M D2020
up to
5101311299 30,0 24,5 26,5
from
5101311300 30,0 26,0 28,0
M D2030
up to
21,5
510101938 30,0 23,5
from *
510101939 30,0 20,5 22,5
M D2040A
MD2040B
**868748 30,0 20,0 22,0
MD2040B
**868778
MD2040C 30,0 18,0 20,0
° engine number
- product number
Fuel system
I njection start,
Z
crankshaft pos.
24,5-26,5° f.o.d.
24,5-26,5° B.T.D.C.
26,0-28,0° B.T.D.C.
21,5-23,5° B.T.D.C.
20,5-22,5° B.T.D.C.
20,0-22,0° B.T.D.C.
18,0-20,0° B.T.D.C.
5 5