30
If, after increasing the spring (M) pulling potential as described above, the piston (C)
continues to impede the rod (P) it is necessary to check the correct function of the
acceleration device by checking the
maximum pressure regulation valve
(fig. 16, page
26) proceeding as follows:
Dismantle and clean the various components, carefully checking to make sure
that there are no foreign bodies that may impede the perfect sealing of the housing of the
valve itself.
Should any abrasions or scratches be noted on the components it is necessary
to replace the damaged parts or complete valve.
Once replacement has been made the valve must be calibrated according to
the instructions in paragraph 8.2 .
5)
After ensuring that the motor is completely accelerated, record the rpm value
using the speedometer. Compare the reading with the indication in paragraph 2: A
variation of ± 3-4% is permitted.
6)
In the event that with the acceleration rod pressed down and with motor
therefore fully accelerated, the number of revs is found to be significantly lower than that
indicated on the plate (at least 150 revs less), the cause of the defect causing lack of
motor power must be found, probably being due to the injection feed devices being
insufficiently efficient (fuel filter, injectors, feed pump, injection pump, etc.) .
It is advisable that all the interventions on the injection device (injectors, feed
pumps, etc.) be undertaken by the "
Assistance service
" authorized by the manufacturing
company, particularly if the machine is still under guarantee.
-- 8.1.2) CHECK ON THE MINIMUM MOTOR RPM --
1)
Start the machine according to the instructions in paragraph 7.2 .
2)
Keep the air delivery cocks fully closed.
3)
Check that the pressure indicated on the gauge on the control panel corresponds to the
value indicated in paragraph 2, if it does not, regulate according to the indications in
paragraph 8.2 .
4)
Using the refractive speedometer device, read the motor rpm which should correspond
to that indicated in paragraph 2; variations of over 5% of the value are not permitted.
Summary of Contents for MDVN 71 AP
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