Yanmar 4LHA-HTP Operation Manual page 330

Chapter 2 Basic Engine
2. Cylinder Block
2-4 Replacement of cup plugs
Step
No.
Clean and remove grease from the hole into
which the cup plug is to be driven.
(Remove scale and sealing material previously
applied.)
Remove grease from the cup plug.
3. Apply Threebbnd No. 4 to the seat surface
where the plug is to be driven in.
Insert the plug into the hole.
Place a driving tool on the cup plug and drive it
5.
in using a hammer.
fi
• 2 ^ 3mm (0.0787 ~ 0.1181 in.)
•Using the special tool, drive the cup
plug to a depth where the edge of the
plug is 2mm (0.0787in.) below the
cylinder surface.
Description
Procedure
Remove foreign
materials with a
screw driver
or saw blade.
Visually check the nick around
the plug.
Apply over the whole outside of
the plug.
Insert the plug so that it sits
correctly.
Drive in the plug parallel to the
seating surface.
100mm (3.9370in.)
3mm(0.1181in.)
d
Plug dia.
013.9 -14.0 (00.547 - 0.551)
014
039.9 ~ 40.0 (01.571 ~ 1.575)
040
2-10
14LHA Series
Tool or material used
•Screw driver or saw blade
•Thinner
•Thinner
•Threebond No. 4
•Driving tool
•Hammer
mm (in.)
D
020(00.79)
050(01.97)