English – 25
OPERATING
6 Engine speed does not change
3-Speed gearbox model
Shifting gears
The 3-speed gearbox has three speeds and two neutral
positions available. This gearbox can be shifted into neutral if
the blade rotation needs to be eliminated while the engine is
running. If the machine is equipped with the optional blade
clutch the blade clutch can be disengaged to eliminate blade
rotation while the engine is running.
• Set the Engine start switch to STOP position. Always turn
engine OFF before shifting gears.
• Verify that pulley size, flange size and blade shaft speed
are correct for the blade size mounted on the machine.
• Loosen jam nut. Turn knob two turns.
• Move Gearbox shift lever to required gear. If gearbox
seems hard to shift, a slight movement of the blade shaft
may ease movement of gearbox shift lever into proper
gear.
• Hand tight knob. Tighten jam nut (30 ft-Ibs / 40 Nm).
A machine that is factory equipped with a 3-speed gearbox is
designed to minimize the necessary adjustments for blade
size changes. However it will require some adjustments. The
machine is configured from factory to operate with a specified
range of blade sizes inside the factory installed blade guard.
There are 4 possible machine drive configurations on these
machines:
• 14-26, for 14” to 26” (350 to 650mm) blades
• 20-30, for 20” to 30” (500 to 750mm) blades
• 20-36, for 20” to 36” (500 to 900mm) blades
• 26-42*, for 26” to 42” (650 to 1000mm) blades
*Only available on FS7000 D
If a blade size must be changed to another size, within the
current configuration, then only the gears need to be shifted.
If a blade size must be changed to another, outside the
current configuration, then the blade drive configuration must
be changed.
!
WARNING! Serious injury can occur to the
operator or people in the work area if the
rotational speed (n/min) of the diamond
blade exceeds the maximum speed (n/min)
marked on the diamond blade.
!
CAUTION! Never shift the gears with engine
running. Gearbox damage could occur.
Never shift gears prior checking the blade
drive configuration.
!
WARNING! After shifting gear, hand tight
knob and tighten jam nut or the gearbox
could be damaged.
ENGINE SPEED / BLADE SIZE (FS 5000 D)
ENGINE SPEED BLADE SHAFT
FLANGE
SIZE
LOADED
RPM
PULLEY
SIZE
PULLEY
SIZE
RATED
RPM
BLADE
SIZE
Select
14" 4.5" 3200 30004.17" 6"
20" 4.5" 2400 30004.17" 4.51"
26" 5" 1870 30004.17" 3.50"
30" 5" 1630 30004.78" 3.50"
36" 6" 1360 30005.75" 3.50"
FS 5000 D
RPM RPM
Select
350mm 114mm 3200 3000106mm 152,5mm
500mm 114mm 2400 3000106mm 114,5mm
650mm 127mm 1870 3000106mm 89mm
750mm 127mm 1630 3000121,5mm 89mm
900mm
152,5mm 1360 3000146mm
89mm
Ø
Ø
n
min
n
min
ØØ
2
1
1
2
3
N N
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