Disassembly Of 2-Valve Cylinder Head - Yanmar 3TNV82A Service Manual

2-Valve Cylinder Head
1 – Valve Cover Nut
2 – Valve Cover Nut O-Ring
3 – Crankcase Breather Cover
4 – Diaphragm Spring
5 – Diaphragm Plate
6 – Crankcase Breather Diaphragm
(non-turbocharged engines only)
7 – Oil FIll Cap
8 – Valve Cover Gasket
9 – Rocker Arm Shaft Spring
10 – Valve Adjusting Screw Lock Nut
11 – Valve Adjusting Screw
12 – Rocker Arm
13 – Rocker Arm Shaft
14 – Rocker Arm Shaft Aligning Stud
15 – Support Bolt
16 – Rocker Arm Shaft Support
17 – Valve Cap
18 – Valve Keepers
19 – Spring Retainer
20 – Valve Spring
21 – Valve Stem Seal
22 – Valve Guide
23 – Cylinder Head
24 – Intake Valve
25 – Exhaust Valve
26 – Cylinder Head Gasket
27 – Fuel Injector Retainer
28 – Washer
29 – Fuel Injector Retainer Bolt
30 – Fuel Injector Nozzle Protector
31 – Fuel Injector Nozzle Seat
32 – Push Rod
33 – Crankcase Breather Components
34 – Valve Cover
Disassembly of 2-Valve Cylinder
Head
Prepare a clean, flat working surface on a
workbench large enough to accommodate the
cylinder head assembly. Discard all gaskets,
O-rings and seals. Use new gaskets, O-rings and
seals on reassembly of the cylinder head.
1. Drain the coolant from the engine into a suitable
container. See Drain, Flush and Refill Cooling
System With New Coolant on page 5-35.
TNV DI Service Manual
CAUTION
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.
2. Disconnect the electrical wire from the intake air
heater (Figure 6-2, (1)).
(1)
Figure 6-2
ENGINE
0000080en
6-33