Complete Disassembly - Yanmar 3TNV Series Service Manual

4.1.3 Complete disassembly

Peripheral parts such as air cleaner, muffler and radiator differ in installation and types for each
application. Therefore, description in this Chapter is started with the steps to be taken just after the
peripheral parts have been removed.
Step
1) Thoroughly remove sand, dust, dirt and soil
from the surface of the engine.
1
2) Drain coolant water and lubricating oil from
the engine.
1) Remove turbocharger and exhaust manifold.
2) Remove intake manifold and surge tank.
2
1) Close the fuel cock valve of the fuel tank.
2) Remove high-pressure fuel pipe.
3) Remove fuel return pipe.
4) Loosen the tightening nut on fuel injection
nozzle retainer and extract the retainer and
3
fuel injection nozzle.
*) Fuel injection nozzle for Indirect injection
system is screwed type.
1) Remove rocker arm cover assembly.
4
1) Remove valve rocker arm shaft assembly.
2) Remove push rod.
5
1) Remove fan mounting bolt, and then remove
fan.
2) Loosen adjusting bolt for the V-belt adjuster,
and then remove V-belt.
6
3) Remove alternator.
4) Remove the spacer for cooling fan and
V-pulley.
1) Remove lubricating oil filter assembly.
2) Extract dipstick form the oil dip-stick hole.
7
1) Disconnect fuel return pipes to.
2) Remove fuel filter.
8
Removal Parts
4. Disassembly, Inspection and Reassembly of Engines
1) If nozzle seat is left on the cylinder head,
remove the cylinder head before extracting
nozzle seat.
2) To prevent dust from entering fuel injection
nozzle, fuel injection pump and high-pressure
fuel pipe, seal their respective threads with a
tape or the like.
3) Whenever extracting fuel injection nozzle,
replace nozzle protector with a new one.
1) Attach a tag to push rod for each cylinder No.
to put the push rod in order.
2) Remove valve cap from the intake/exhaust
valve head.
3) Note that tappet of the indirect injection
system can be removed at the same time
when push rod is extracted.
4) Attach a tag to tappet for each cylinder No. to
put the tappet in order.
1) Never turn down alternator vigorously toward
the cylinder block. Otherwise, your finger
may be nipped and alternator broken.
65
Remarks