Idle Speed Adjustment; High Speed Adjustment - Lombardini LDW 502 Workshop Manual

VIII TESTING-OPERATIONAL-ADJUSTMENTS
COMPILER TECO/ATI
84

IDLE SPEED ADJUSTMENT

1. Check and/or fill the engine with coolant and engine oil. Fill the
engine or machine fuel tank with fuel.
2. Attach or set-up a calibrated tachometer.
3. Start the engine and allow a 10 Minute warm-up period.
4. Remove all loads from the engine.
5. Loosen the locknut at position(1). Adjust screw(1) until an idle
speed of 850 - 900 r/min is achieved.
6. Tighten the locknut at position(1).
NOTE: Rotating the screw(1) clockwise increases the idle speed,
while rotating the screw(1) counter-clockwise reduces the idle speed.
HIGH (MAXIMUM) SPEED ADJUSTMENT
1. Check and/or fill the engine with coolant and engine oil. Fill the
engine or machine fuel tank with fuel.
2. Attach or set-up a calibrated tachometer.
3. Start the engine and allow a 10 Minute warm-up period.
4. Remove all loads from the engine.
5. Loosen the lock nut at position(2). Simultaneously adjust screw(2)
and hold the throttle lever at full travel as shown until the maximum
speed is 3800 r/min.
6. Tighten the locknut at position(2)
NOTES: Rotating screw(2) clockwise will reduce the maximum
speed, while rotating the screw(2) counter-clockwise will allow a
higher maximum speed. Setting the maximum no-load speed at 3800
r/min will allow for 3600 r/min operation when the engine is fully
loaded. Some fine adjustment may be required after the engine is
applied within the given machine.
TORQUE DEVICE ADJUSTMENT (WITHOUT DYNAMOMETER)
Lombardini recommends that the engine torque device be adjusted
on a dynamometer. Therefore, the adjustment procedure presented in
the following is only approximate. WARNING: ADJUSTMENT OF
THE TORQUE DEVICE WILL REQUIRE THE USE OF TOOLS IN
CLOSE PROXIMITY TO THE COOLING FAN. DO NOT PERFORM
THIS OPERATION WITHOUT A PROPER FAN GUARD IN PLACE.
USE EXTREME CARE NOT TO ALLOW TOOLS OR BODY PARTS
TO COME IN CONTACT WITH THE COOLING FAN, FAN
SUPPORT OR FAN BELT.
1. Loosen the torque device locknut at point(C).
2. Rotate the torque device(C) clockwise several revolutions.
3. Tighten the torque device locknut.
4. Start the engine, allow to warm and lock the speed at 3800 r/min.
5. Loosen the locknut at position(C)
6. Rotate the torque device(C) counter-clockwise until the speed
begins to reduce.
7. Rotate the torque device(C) clockwise 2.5 revolutions.
8. Tighten the locknut at position(C).
TORQUE DEVICE DETAILS
The torque device(C) serves two(2) primary functions. First, the
torque device limits the maximum power output by limiting maximum
fuel delivery. Fuel delivery is limited by controlling the travel of
lever(L), thus the injection control rack. Secondly, the torque
device(C) provides a torque rise in the engine as the fuel delivery is
limited. As the governor spring(N) pulls the lever(L) toward the torque
device(C) during high load situations, an additional travel equivalent
to (H) is allowed providing for the maximum fuel delivery and
maximum enginer torque. The distance (H) is a direct function of the
internal torque device spring(M). (H) is typically equal to 0.4mm.
REG. CODE
MODEL N°
1-5302-351 50563
DATE OF ISSUE
04
REVISION
04.90
DATE ENDORSED
15.11.99