Yanmar 2TNV70 Service Manual page 70

4. Disassembly, Inspection and Reassembly of Engines
Step
1) Remove cylinder head tightening bolts.
2) Remove a cylinder head assembly.
3) Remove a cylinder head gasket.
10
1) Remove crankshaft V-pulley clamping bolt.
2) Using a puller, extract crankshaft V-pulley.
11
1) Remove oil pan mounting bolts under a gear
case.
12
2) Remove gear case mounting bolts.
3) Remove a gear case.
1) Remove the nut from fuel injection pump
drive gear. Extract the fuel injection pump
13 drive gear using a puller.
1) Remove a lube oil pump.
14
1) Remove a starting motor from flywheel
housing.
15
Removal Parts
1) Lay a cardboard or the like on the floor and
place a cylinder head assembly on it so as
not to damage the combustion surface.
2) The order of loosening the cylinder head
tightening bolts.
3) To remove the intake/exhaust valves from
cylinder head assembly, take the following
steps.
a) Using a valve spring compressor (see
4.1.2(1) No.4 in Chapter 4), compress a valve
spring and remove a valve cotter.
b) Remove valve retainer and valve spring.
c) Remove intake valve and exhaust valve.
1) Extract crankshaft V-pulley by hitting the bolt
of the puller using a plastic hammer or the
like.
1) Never fail to removes stiffner bolt at the
center of the gear case
2) When removing the gear case, carefully
protect oil seal from damage.
1) Before removing fuel injection pump, make
sure of the position of the arrow on the pump
body for adjusting fuel injection timing as well
as the position of the scribed line of the gear
case flange.
55
Remarks