New Holland 40 Series - 4 & 6 Cylinder Diesel Engine Disassembly and Overhaul; Cylinder Head, Valves and Related Parts

---------- PART 1 - ENGINE SYSTEMS----------
PROBLEM
POSSIBLE CAUSES REMEDY
Excessive
exhaust
1. Oil leak on compressor or
1.
Overhaul turbocharger
smoke
turbine
side
of
turbocharger where fitted
2. Exhaust leak on exhaust
2.
Fit new gasket
manifold side of
turbocharger where fitted
3.
Air cleaner dirty or
3.
clean
restricted
4.
Excessive fuel delivery
4.
Overhaul injection pump
and injectors
Water temperature
1. Faulty temperature sender
1. Renew sender switch
gauge fails to reach
normal operating
2.
Incorrect or faulty
2. Renew thermostat
temperature
thermostat
3.
Faulty water temperature
3.
Renew temperature gauge
gauge
C. 4&6 CYLINDER DIESEL ENGINE - DISASSEMBLY AND OVERHAUL
Dismantle the engine following conventional
techniques,
or by referring to the following re-
moval procedure, referring to the "Specifica-
tion" section
as necessary.
NOTE: All gaskets, seals and 'O' rings must
be replaced with new, upon re-assembly.
Where
new sealant is to be applied, refer to
"Engine Specifications".
CYLINDER HEAD, VALVES AND
RELATED
PARTS
NOTE: The cylinder head can be removed
with the engine installed in the tractor.
1. Disconnect the battery.
2. Remove the engine side panels.
3.
4.
5.
6.
7.
8.
9.
8
Drain the coolant from the radiator and
engine block.
Shut off heater hose taps, then discon-
nect and plug heater hoses (where fitted).
Remove the radiator top hose.
Remove exhaust muffler and exhaust ex-
tension pipe.
Remove the air cleaner pre cleaner.
Remove the air cleaner to intake manifold
tube and hoses.
Shut-off fuel tank tap, disconnect low
pressure fuel lines and remove inlet mani-
fold (cap all exposed openings).