Disassembly Of Cylinder Block Components - Yanmar 2TNV70 Service Manual

Cylinder Block
1 – Cylinder Block
2 – Camshaft Bushing
3 – Gear Case
4 – Dowel (2 used)
5 – O-Ring
6 – Gear Case Cover
7 – Front Crankshaft Seal
8 – Fuel Injection Pump Gear Cover
9 – Tappets
10 – Camshaft
11 – Camshaft Gear Key
12 – Camshaft End Plate
13 – Camshaft Gear
14 – Idler Gear Shaft
15 – Idler Gear Bushing
16 – Idler Gear
17 – Oil Pickup O-Ring
18 – Oil Pickup
19 – Crankshaft
20 – Crankshaft Gear Key
21 – Crankshaft Gear
22 – Crankshaft Pulley
23 – Main Bearing Inserts
24 – Main Bearing Cap
25 – Crankcase Extension
26 – Oil Pan
27 – Thrust Bearings
28 – Flywheel
29 – Connecting Rod Cap
30 – Connecting Rod Bearing Inserts
31 – Connecting Rod
32 – Wrist Pin Bushing
33 – Circlip
34 – Wrist Pin
35 – Piston
36 – Oil Ring
37 – Second Compression Ring
38 – Top Compression Ring
39 – Dowel (2 used)
40 – Crankshaft Rear Seal
41 – Flywheel Housing
TNV IDI Service Manual
Disassembly of Cylinder Block
Components
Prepare a clean, flat working surface on a
workbench large enough to accommodate the
engine components. Discard all used gaskets,
O-rings and seals. Use new gaskets, O-rings and
seals for reassembly of engine.
NOTICE
Identify all parts and their location using an
appropriate method. It is important that all parts are
returned to the same position during the
reassembly process.
IMPORTANT
Mark all valve train components so they can
be installed in their original locations.
Note: Record all measurements taken during
disassembly.
If the engine will be completely disassembled, the
following preliminary steps should be performed:
1. Disconnect the battery cables at the battery.
Always disconnect the negative (-) cable first.
2. Remove the throttle cable, electrical
connections, intake and exhaust system
connections, and fuel supply lines from the
engine.
3. Remove the alternator. See Removal of
Alternator on page 11-10.
4. Drain the engine coolant from the radiator and
cylinder block. See Drain, Flush and Refill
Cooling System with New Coolant on
page 5-21. Remove the cooling system
components from the engine.
Be sure to secure the engine solidly to prevent
injury or damage to parts due to the engine falling
during work on the engine.
ENGINE
NOTICE
6-35