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10
Adjustments
3
188
A
E
189
B
190
- 76 -
4
H
5
Fasten lock nut 4 keeping adjusting screw 3 in its position.
Injection pump delivery limiting and torque adapter
Delivery limiting device C has the function of limiting the injection pump
max. delivery.
The same mechanism acts also as a torque gearing device. Indeed,
under torque, spring E inside the limiter is compressed when subject to
the action of the governor levers, by exploiting the opposed forces of the
accelerator spring and of the centrifugal weights of the speed governor.
Stroke H that the torque gearing device allows to be carried out by lever
A is 0.25÷0.30 mm. It can be adjusted by means of nut A, and conse-
quently the injection pump delivery will increase under the specified
set torque value.
Injection pump delivery approximate setting
This regulation must be carried out by means of a water brake, other-
wise the adjustment will be approximate. proceed in the following way.
Loosen flow rate limiter B by 5 turns.
Accelerate the engine to no-load top rate, i.e. to 3800 rpm.
Re-tighten limiter B until the engine tends to decelerate.
Loosen limiter B by one and a half turns.
Tighten the check nut 5.
Note: tighten B to a 1/4 of full turn if the engine produces an excessive
amount of exhaust in the maximum load condition; loosen B of a
1/4 of a full turn if no smoke is exhausted and if the engine is
unable to develop its maximum power.
Workshop Manual KD 441_cod. 1.5302.865_2
nd
ed_ rev. 01.
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