121FS 240 C, FS 260 C, FS 360 C, FS 410 C, FS 460 C-M
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 aligns with the
dome (arrow) on the gear
housing
: 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 square profile of
the drive pinion, turn the output
shaft on the gearbox if necessary
: Tighten screws (3)
Checking operation
– Unplug the spark plug boot and
turn the engine; the output shaft
on the gearbox must also turn
12.4.2 Disassembly
– Removing cutting attachment
– Remove gearbox, b 12.4.1
– Observe safety instructions when
heating parts, b 1
5904RA375 TG
1
2
3
3
: Remove the circlip (1)
– Heat gearbox in the area (arrows)
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
Always use new ball bearings.
: Remove the circlip (1)
1
5904RA376 TG
1
5904RA501 TG
5404RA502 TG
1
2
3
: Position set of pinions on the
outer race of the ball bearing (2)
and use a suitable tool to press
out the drive pinion (3)
: Remove the circlip (1)
– Heat the output end of the
gearbox to 120 °C (250 °F)
: Once this temperature is
reached, the entire output side
set of pinions (1) can be pulled
out
– Check gearbox, clean and
replace if necessary
1
5904RA377 TG
1
5904RA503 TG
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