Husqvarna FS 9900 D Operator's Manual page 60

14 Engine / Blade Shaft / Gearbox
Speed Adjustment
(See Figures 1-6)
WARNING: Serious injury can occur to the
operator or people in the work area if the
rotational speed (n/min) of the DIAMOND
BLADE (2E) exceeds the maximum speed
(n/min) marked on the DIAMOND BLADE (2E).
ENGINE SPEED:
The engine speed on this machine does not need to
be changed from the factory set speed. The maximum
engine RPM should be 2870, no load.
BLADE SHAFT SPEED:
The blade shaft speed on this machine should be checked
before fi tting the DIAMOND BLADE (2E) to the machine.
Never install a DIAMOND BLADE (2E) if the blade shaft
rotational speed (n/min) of the machine is greater than
the maximum speed (n/min) marked on the DIAMOND
BLADE (2E)! The BLADE SHAFT PULLEY (3-1N,
3-2N) and BLADE SHAFT FLANGE (2B & 2F) may
need to be changed if the diameter of the Diamond Blade
is changed!
SINGLE SPEED GEARBOX MODEL:
Each saw model, as delivered from the factory, is
designed to operate with a specifi ed range of blade sizes
inside the blade guard installed on the machine. If a blade
size outside the specifi ed range of sizes for your model
must be used, then the saw drive confi guration must
be changed.
If changing from a small to a very large DIAMOND BLADE
(2E) on a machine with a single speed gearbox, the Blade
Shaft Pulleys (3-1L), Gearbox Pulleys (3-1N), the BLADE
SHAFT FLANGES (2B & 2F), and the Blade Guard must
be changed.
For example, to change a single speed gearbox model
from a 18" (450mm) drive to a 36" (900mm) drive:
1. Change Engine Gearbox Pulley from 4.75" (121mm)
diameter to 3.65" (93mm) diameter.
2. Change Blade Shaft Pulley from 4.12" (105mm)
diameter to 5.60" (142.2mm) diameter.
3. Change Blade Flanges from 5.00" (127mm) diameter
to 6" (152mm) diameter.
4. Change BLADE GUARD (2H) from 18" (450mm) to
36" (900mm).
5. Engine Speed does not change.
See Blade Size Conversion charts for specifi c information.
THREE SPEED GEARBOX MODEL (14-26, 18-30,
20-36, 26-42, 30-48, 36-60):
CAUTION: Never shift the Gearbox (3-2A)
with engine running! Only shift the Gearbox
(3-2A) with engine OFF! Gearbox damage
could occur.
See "GEARBOX SHIFT LEVER (3-2O)" for details about
operating shift lever.
A machine factory equipped with a Three Speed
60
ENGINE GEARBOX (3-2A), while designed to minimize
adjustments required for blade size changes, will
require some adjustments. The machine is designed to
operate with a specifi ed range of blade sizes inside the
factory installed blade guard. Color coded information
on machine, and information in operation manual,
shows allowable blade sizes for current machine
drive confi guration. There are six (6) machine drive
confi gurations: a) 14-26 for 14" to 26" (350 to 650 mm)
blades, b) 18-30, for 18" to 30" (450 to 750 mm) blades, c)
20-36, for 20" to 36" (500 to 900 mm) blades, d) 26-42 for
26" to 42" (650-1000 mm) blades, e) 30-48 for 30" to 48"
(760-1219 mm) blades f)36"-60" (900-1500mm)(FS 8400
D). For example, to change the blade size on a machine
drive confi guration 18-30 within these range, 18" to 30"
(450 to 750 mm), requires only that GEARBOX SHIFT
LEVER (3-2O) be moved into the correct position (1, 2,
or 3). If the required blade size is outside of the machine
drive confi guration range [below 18" (450mm) or above
30" (750 mm) for this example], then the machine drive
confi guration must be changed. This may require shifting
the GEARBOX SHIFT LEVER (3-2O), changing BLADE
SHAFT PULLEYS (3-2L), GEARBOX PULLEYS (3-2N)
and BLADE SHAFT FLANGES (2B & 2F).
Example: To change a three-speed gearbox model from a
20" (500mm) drive to a 36" (900mm) drive, fi rst determine
the machine drive confi guration (14-26, 18-30, 20-36,
26-42, or 30-48). This should correspond to the BLADE
SHAFT FLANGE (2B & 2F) diameter installed on the saw.
If the machine drive confi guration is a 20-36, the FLANGE
(2B & 2F) diameter is should be 6.00" (152mm):
a) Verify proper pulley diameters are installed (See Blade
Size Conversion charts for specifi c information).
b) Shift the GEARBOX SHIFT LEVER (3-2O) from
3 to 1.
c) Verify that machine drive confi guration and blade shaft
speed corresponds with information in operation manual,
and gearbox range decal (522627702).
If the machine drive configuration is an 18-30, the
FLANGE (2B & 2F) diameter should be 5.00" (127mm):
a) Change the BLADE SHAFT PULLEY from 4.12" (105
mm) diameter to 4.75" (121mm).
b) Change the BLADE SHAFT FLANGE from 5.00"
(127mm) diameter to 6.00" (152mm).
c) Shift the GEARBOX SHIFT LEVER (3-2O) from
2 to 1.
d) Verify that machine drive confi guration and blade
shaft speed corresponds with 20-36 drive confi guration
information in operation manual.
e) Install the 20-36 drive confi guration decals (Decal
522627704 is required). See the "Decals and Locations"
page of this manual for more information.
If the machine drive confi guration is a 14-26, the FLANGE
(2B & 2F) diameter should be 4.50" (114.3mm):
a) Change the BLADE SHAFT PULLEY from 4.12"
(105mm) diameter to 4.75" (121mm).
b) Change the BLADE SHAFT FLANGE from 4.50"
(114.3mm) diameter to 6.00" (152mm).
c) Change the ENGINE GEARBOX PULLEY from 4.75"
(121mm) diameter to 4.12" (105mm).
d) Shift the GEARBOX SHIFT LEVER (3-2O) from
2 to 1.
e) Verify that machine drive confi guration and blade
shaft speed corresponds with 20-36 drive confi guration
information in operation manual.