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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 3000, no load.
BLADE SHAFT SPEED:
The blade shaft speed on this machine should be checked
before 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 specied range of blade sizes
inside the blade guard installed on the machine. If a blade
size outside the specied range of sizes for your model
must be used, then the saw drive conguration 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 specific
information.
THREE SPEED GEARBOX MODEL (14-26, 18-30,
20-36, 26-42, 30-48):
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
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 specied 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 conguration. There
are ve (5) machine drive congurations: 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
(FS 8400 D). For example, to change the blade size on
a machine drive conguration 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 conguration range [below 18” (450mm) or
above 30” (750 mm) for this example], then the machine
drive conguration 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, rst
determine the machine drive conguration (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 conguration 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 specic information).
b) Shift the GEARBOX SHIFT LEVER (3-2O) from
3 to 1.
c) Verify that machine drive conguration and blade shaft
speed corresponds with information in operation manual,
and gearbox range decal (504 11 98-09).
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 conguration and blade
shaft speed corresponds with 20-36 drive conguration
information in operation manual.
e) Install the 20-36 drive conguration decals (Decals
504 11 98-09, 542 20 65-49 are required). See the “Decals
and Locations” page of this manual for more information.
If the machine drive conguration 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).