Farymann Diesel 15D Series, Workshop Manual

Page: 69 / 76

III. ENGINE REPAIR
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III.6.3. Acceleration lever
The acceleration lever is fixed in its position
on the excentric shaft with a pin. The rachet
plate located behind the lever is not fixed
and only kept in place by the M8 nut. As the
ratched plate is used as a buffer for the
engine shut down, the correct position
between plate and lever is important. The
lower edge of the lever should leave one
and a half notches visible.
(Figure 20)
If more notches are visible the shut down of
the engine may be hampered; if no notch is
visible, damages (denting) on the
control/eccentric shaft lever may occur.
To relocate the rachet plate loosen M8 nut,
hold the lever and move the plate till correct
position is reached. Tighten the M8 nut
while holding the lever, as otherwise the
regulation linkage may be dented.
III.7. Resurfacing valve seats
The cylinder head is fitted with valve seat
rings made of wear resistant steel. Should a
resurfacing be necessary,use valve seat
cutter. Simply insert guide pin (o.6.98 mm)
into valve guide. Slide cutter over the guide
and, while applying light pressure only,
rotate the cutter with the T-handle.
(Figure 21)
Do not cut too deep. Observe the maximum
permissible valves recess.After cutting the
seat with fine grinding compound. To check
the valve sealing, insert the valve and fill a
small amount od diesel oil through the inlet
resp. outlet channel. The sealing is ok when
at a maximum 2 drops per minute leak out
of closed valve.
This section is a guide to be possible
location of the faults that may occure on
an engine. Information of possible
causes and suggested remedies are
also given. But please note that this list
can never be compete.