Stihl FS 240 - Gearbox for Drive Tube Assembly 28 MM with Serration; Removal and Installation; Disassembly

124 FS 240 C, FS 260 C, FS 360 C, FS 410 C, FS 460 C-M
12.5 Gearbox for drive tube
assembly 28 mm with
serration
12.5.1 Removal and installation
– Removing cutting attachment
: Undo the screw (1)
: Pull gearbox (2) off of drive tube
assembly (3)
– Examine gearbox, repair or
replace if necessary, b 12.5.2
Installation
Drive tube assembly is installed on
the machine.
– Degrease clamping area, b 14
: Orient gearbox (1) so that the
sticker on the drive tube
assembly (2) aligns with the
dome on the gear
housing (arrow)
2
5904RA475 TG
1
3
5904RA483 TG
1
2
3
: With gentle twisting motions,
slide the gearbox (1) onto the
drive tube assembly (2) as far as
it will go, until the drive shaft
aligns with the serrations of the
drive pinion, turn the output shaft
on the gearbox if necessary
: Tighten bolt (3)
Checking correct functioning
– Unplug the spark plug boot and
turn the motor; the output shaft
on the gearbox must also turn
12.5.2 Disassembly
– Removing cutting attachment
– Remove gearbox, b 12.5.1
– Observe safety instructions when
heating parts, b 1
: Unscrew the stud (1)
1
5904RA517 TG
– Heat gearbox in the area of the
bearing seats of the drive tube
assembly connection to
approx.120 °C (250 °F)
: Once this temperature is
reached, the entire drive side set
of pinions (1) can be pulled out
Cold removal of the drive side set
of pinions
: Remove punch (1) from puller (2)
5910 890 4408
: Twist nut (3) as far as the
locknuts and push the puller (2)
with the insert (4) first into the
inner serrations of the drive
pinion until it engages
1
5904RA518 TG
4
1
5904RA538 TG
2 3