Lombardini CHD series - Engine Settings; Idling speed setting in no-load conditions (standard); Full speed setting in no-load conditions (standard); Standard injection pump delivery setting without torque dynamometer

- 83 - Workshop Manual LDW CHD _ cod. 1.5302.345 - 6° ed_rev. 05
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Idling speed setting in no-load conditions (standard)
Afterllingwithoil,fuelandcoolant,starttheengineandwarm
up for 10 minutes.
Adjust idling speed at 850÷950 rpm by turning screw 1 then
tighten lock nut.
Note: Speed decreases when loosening screw 1 and increases
when tightening it.
Injection pump delivery limiting and torque adjusting device
Limiting device C has the function of limiting the injection pump
maximum delivery
The same device acts as torque adjusting device since springs
N act on lever L and thus oppose the resistance of spring M
contained in the barrel.
The torque limiting device allows lever L to have a stroke H of
1.0÷1.1 mm: this increases the injection pump delivery while
torque reaches its peak.
Note: In application for generating sets and motor welding units
the torque adjusting device only acts as delivery limiting
device without spring M and stroke H.
Standard injection pump delivery setting without torque
dynamometer
This adjustment must only be carried if necessary and if there
is no dynamometric brake, since this type of adjustment is very
approximate.
Loosen delivery limiting device C by 5 turns.
Bring engine to max. rpm in no-load conditions i.e. 3200 rpm.
Tighten limiting device C until the engine rpm decreases.
Unscrew limiting device C by 1÷ 1/2 turn.
Tighten lock nut.
Note: If the engine, at full load, generates too much smoke
tighten C; loosen C if no smoke is observed at the
exhaust and if the engine cannot deliver its full power.
Full speed setting in no-load conditions (standard)
Before carrying out this operation, make sure that the engine
adjustment is standard; i.e. corresponding to one of the power
curve diagrams shown on pages 20- 21.
Example of adjustment of an engine at 3000 rpm:
After setting idle speed turn screw 2 and set full speed in no-
load conditions at 3200 rpm; then tighten lock nut.
When the engine reaches the pre-set power, full speed stabilizes
at 3000 rpm.
Nota: Speed increases when loosening screw 2 and decreases
when tightening it.
SETTINGS