2.7 Tighteningtorques
DGandP-type(Plastoform)screwsareusedinthermoplasticandalloyedmaterials.Thesescrewscutathread
inthematerialwhentheyarescrewedinforthefirsttime.Thematerialispermanentlydeformed.Thescrews
canberemovedandrefittedasoftenasdesired.Thestrengthofthescrewconnectionisnotimpairedifthespe-
cifiedtighteningtorqueismaintained.
Itisthereforeessentialtouseatorquewrench.
Fastener Thread Forcomponent Tighteningtorque Remarks
size (Nm)
Splinescrew IS-M5x25 Crankcase 9.5
Splinescrew IS-M5x25 Spacerflange/cylinder 5.5 1)
Splinescrew IS-DG5x24 Cylinder/crankcase 9.5
Splinescrew IS-M5x16 Muffler/cylinder 9.5
Splinescrew IS-M5x16 Muffler/crankcase 9.5
Splinescrew IS-M5x16 Tensioner/spacerflange 3.5
Splinescrew IS-M5x16 Fanhousing/crankcase 5.5
Splinescrew IS-M5x16 Starter/crankcase 5.5
Splinescrew IS-M4x20 Ignitionmodule/cylinder 4.5
Splinescrew IS-M5x16 Shroud/fanhousing 3.5
Splinescrew IS-M5x16 Shroud/startercover 3.5
M8 Clutch 21.0
M8 Startercarrier 20.0
M14x1.25 Sparkplug 20.0
Plastoformscrew IS-P5.5x12 Roperotorinstartercover 3.5
Splinescrew IS-M5x16 AVsleeve(clampingscrew) 5.5
Splinescrew IS-DG5x12 AVsleeve/protectivetube 2.5
Nut M5 Filterhousing/carburetor 4.0
Splinescrew IS-M5x18 Clampingcollar/bearinghousing 6.5 2)
Self-tappingscrew IS-B3.5x9.5 Bearinghousing/protectivetube 3.0 2)
Splinescrew IS-M5x33 Clampingcollar/guard 4.5 2)
Studbolt Detentspring/slidecontrol 1.0
Splinescrew IS-M5x16 Controlhandle,clampingcollar/
protectivetube(loopedhandle) 3.5 2)
Splinescrew IS-M6x50 Loopedhandle/protectivetube 3.5 2)4)
Splinescrew IS-DG5x16 Loopedhandle/handlehose 2.5 2)4)
Splinescrew IS-M6x25 Bracket,loopedhandle/protectivetube 4.5 3)
Splinescrew IS-M4x19 Controlhandle/handlemouldings
(loopedhandle) 1.0
Splinescrew IS-M5x16 Controlhandle,clampingcollars/
protectivetube 3.5
Plastoformscrew IS-P6x14 Linelimiterblade/guard 2.5 2)
Splinescrew IS-DG5x24 Gearhousing/protectivetube 9.0 3)
Splinescrew IS-M6x20 Gearhousing/protectivetube 7.5 4)
Screwplug M11x10 Gearbox 10.0
7
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