New Holland Speedrower 200 Service Manual page 73

Problem
Engine Running with
Abnormal Knocking
The Engine Smokes
Abnormally. Black or
Dark Grey Smoke.
Blue, Grey-blue, Grey
Smoke Tending to White.
Engine - Engine and crankcase
Possible Cause
Incorrect calibration of speed regulator.
Faulty operation of injectors.
Impurities or water in the fuel and injection
system.
Incorrect play between camshaft cams and
tappets.
Faulty turbocharger.
Air cleaner blocked.
Faulty operation of L.D.A. device.
Linkage between accelerator pedal and
regulation lever incorrectly adjusted.
Faulty operation of injectors.
Fuel lines blocked.
Incorrect set-up of injection pump.
Knocking of crankshaft causing excessive
play on one or more main or rod bearings
or excessive play on shoulders.
Crankshaft unbalanced.
Misalignment of rods.
Noise from piston journals due to excessive
play of piston hubs and in the rod bushing.
Loose bushings in the rod seatings.
Noisy timing.
Excessive maximum pump output.System
low on fluid.
There is an excessive delay on the injection
pump.
The injection pump has an excessive ad-
vance.
The holes in the injectors (or some of them)
are partially or entirely blocked.
Air cleaner blocked or deteriorated.
Loss of compression in the engine due to:
stuck or worn flexible rings;
worn cylinder liners;
valves deteriorated or badly adjusted.
Injection hoses with an unsuitable internal
diameter, end of hoses pinched due to re-
peated blocking.
Excessive delay in injection pump.
Faulty injector.
Leaking of oil from the piston rings caused
by glued or worn rings or wearing of cylin-
der liner walls.
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Correction
Check and correctly calibrate the regulator.
See Bosch dealer.
Clean and completely overhaul the injec-
tors.
Carefully clean the system and refuel. If
necessary drain fuel system.
Check and correct play.
Replace complete unit.
Clean or replace air cleaner.
L.D.A. device is part of injector pump. See
Bosch dealer.
Adjust so that the command lever can be
moved to the full delivery position.
Replace all injectors.
Dismantle the hoses, clean them and re-
place those that are seriously dented.
Correct the set-up of the pump so that in-
jection occurs at the specified angle. See
Bosch dealer.
Rectify the pins of the crankshaft and install
smaller bearings. Replace the thrust half-
rings.
Check alignment of crankshaft.
A check of the individual unit leakage is
necessary to determine whether the dam-
age is in the pump(s) or motor(s).
Replace the piston journal and/or the piston
and rod bushing.
Replace with new bushings.
Adjust the play between camshaft cams
and tappets and check that there are no
broken springs, that there is no excessive
play between the valve stems and the valve
guides, tappets and seatings.
Disconnect the pump and adjust delivery
in accordance with the data given in the
calibration table. See Bosch dealer..
Correct the set-up.
Correct the set-up.
Replace the injectors with a series of new
injectors or clean and rectify the original
ones using suitable equipment.
Clean or replace the filter element.
Overhaul the engine.
Check conditions of the end or unions and
where necessary replace the hoses.
Correct the set-up of the pump. See Bosch
dealer..
Replace the injector.
Overhaul the engine.