New Holland Speedrower 200, Service Manual

Page: 73 / 81

Engine - Engine and crankcase
Problem
Possible Cause Correction
Incorrect calibration of speed regulator. Check and correctly calibrate the regulator.
See Bosch dealer.
Faulty operation of injectors. Clean and completely overhaul the injec-
tors.
Impurities or water in the fuel and injection
system. Carefully clean the system and refuel. If
necessary drain fuel system.
Incorrect play between camshaft cams and
tappets. Check and correct play.
Faulty turbocharger. Replace complete unit.
Air cleaner blocked. Clean or replace air cleaner.
Faulty operation of L.D.A. device. L.D.A. device is part of injector pump. See
Bosch dealer.
Linkage between accelerator pedal and
regulation lever incorrectly adjusted. Adjust so that the command lever can be
moved to the full delivery position.
Engine Running with
Abnormal Knocking
Faulty operation of injectors.
Replace all injectors.
Fuel lines blocked. Dismantle the hoses, clean them and re-
place those that are seriously dented.
Incorrect set-up of injection pump. Correct the set-up of the pump so that in-
jection occurs at the specified angle. See
Bosch dealer.
Knocking of crankshaft causing excessive
play on one or more main or rod bearings
or excessive play on shoulders. Rectify the pins of the crankshaft and install
smaller bearings. Replace the thrust half-
rings.
Crankshaft unbalanced. Check alignment of crankshaft.
Misalignment of rods. A check of the individual unit leakage is
necessary to determine whether the dam-
age is in the pump(s) or motor(s).
Noise from piston journals due to excessive
play of piston hubs and in the rod bushing. Replace the piston journal and/or the piston
and rod bushing.
Loose bushings in the rod seatings. Replace with new bushings.
Noisy timing. 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.
The Engine Smokes
Abnormally. Black or
Dark Grey Smoke. Excessive maximum pump output.System
low on fluid. Disconnect the pump and adjust delivery
in accordance with the data given in the
calibration table. See Bosch dealer..
There is an excessive delay on the injection
pump. Correct the set-up.
The injection pump has an excessive ad-
vance.
Correct the set-up.
The holes in the injectors (or some of them)
are partially or entirely blocked. Replace the injectors with a series of new
injectors or clean and rectify the original
ones using suitable equipment.
Air cleaner blocked or deteriorated.
Clean or replace the filter element.
Loss of compression in the engine due to:
stuck or worn flexible rings;
worn cylinder liners;
valves deteriorated or badly adjusted. Overhaul the engine.
Injection hoses with an unsuitable internal
diameter, end of hoses pinched due to re-
peated blocking.
Check conditions of the end or unions and
where necessary replace the hoses.
Blue, Grey-blue, Grey
Smoke Tending to White.
Excessive delay in injection pump.
Correct the set-up of the pump. See Bosch
dealer..
Faulty injector. Replace the injector.
Leaking of oil from the piston rings caused
by glued or worn rings or wearing of cylin-
der liner walls. Overhaul the engine.
47698329 14/04/2014
10.1 [10.001] / 21