Lombardini 3LD 450, Workshop Manual

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7
89
90
3LD 450 3000 N 7,5 140-146 272-283
3LD 450 3600
NB 7
143-149 285-299
3LD 510 3000 N 9 117-122 272-283
4LD 640 3000 N 10,5 96-100 284-295
4LD 705 3000 N 10,8 96-100 276-287
4LD 705 2600 N 10 108-113 263-277
4LD 820 2600 N 12,1 87-92 258-273
Workshop Manual__3 - 4 LD_cod. ED0053025560_
4° ed
_ rev.
03
Adjustment
* The specific consumption values indicated are valid after abt.
100 working hours.
Adjustment of injection pump delivery with braked engine
1) Bring the engine to its idling point .
2) Move the delivery limiting device 3 towards the left, see
picture 88
3)Operate the engine until it reaches the power and rpm
required by the manufacturer of the equipment.
4) Make sure that the consumption is in compliance with
the values specified in the table of the adjustments (see
information below).
If the consumption is in compliance with the fixed values, it is
essential to change the balance conditions measured on the
brake, operating either on the load and on the regulator.
When the engine is steady, carry out the consumption check
again.
5) Move the limiting device 3 towards the right, as per picture
88, until the engine rpm number descreases. Lock the limiting
device by means of the two screws.
6) Completely release the brake and check the rpm at which the
engine settles. The speed governor performances shall be in
compliance with the class required by the manufacturer of the
equipment.
7) Stop the engine.
8) When the engine is cold, check the valve clearance again.
Required adjustments (the most demanded)
Limiting device for injection pump delivery and torque
gearing device
It is housed in the pump control lever
A
and it is constituted of
a spring on cam B , limiting the stroke of the same lever A .
At the torque rate, the spring flexure, subject to the accelerator
control action, allows a further stroke of lever A, thus an
increased delivery of the injection pump.
Time secs
for 100 cc.
r/kW.h
Kw
power
Engine
Specific fuel
consumption *
Rpm