Chapter 3
Maintenance
3.1 General
3.1.1 Scope
This chapter contains the necessary instructions for technically qualified personnel to carry
out minor inspections and repairs, such as:
-
Periodic inspections of the engine
-
Maintenance of engine components
-
Trouble shooting
3.1.2 Tools and Special Tools and Initial Torque Values
The specifications and sizes of tools are given according to the metric system and can be
procured commercially in specialty shops.
Tools: (metric tools
)
Type Size
Type Size
Open-end wrench
7
Open-end wrench
8
Open-end wrench
10
Open-end wrench
13
Hexagonal socket wrench 3
Hexagonal socket wrench 4
Hexagonal socket wrench
5
Hexagonal socket wrench 6
Sparkplug wrench
[
no size given
] Sparkplug
wrench
20.6/20.8
Torque wrench
0 – 100 Nm
Special tools can be procured commercially, from Göbler-Hirth Engines Ltd. , under specific
G.-H. numbers
Special tools:
Type GH-number
Flywheel puller
W 138
Piston ring clamp (cylinder mounting)
W 108/15
Initial Torque Values
Type
Initial Torque
Type
Initial Torque
M4 x ...
2,8 - 3,3 Nm
M5 x ...
4 - 4,4 Nm
M6 x ...
9,6 – 11 Nm
M8 x ...
23 - 28 Nm
M16 x ...
70 – 80 Nm
Spark plug
16 Nm