RIDGID R4120 Operator's Manual page 17

ASSEMBLY
TO INSTALL ThE BLADE
See Figure 13.
WARNING:
A 12 in. blade is the maximum blade capacity of
the saw. Never use a blade that is too thick to allow
outer blade washer to engage with the flats on the
spindle. Larger blades will come in contact with the
blade guards, while thicker blades will prevent the
blade bolt from securing the blade on the spindle.
Either of these situations could result in a serious
accident and can cause serious personal injury.
 Unplug the saw.
 Once blade has stopped, raise saw arm.
 Remove screw. Rotate blade bolt cover up and back to
expose the blade bolt.
 Depress the spindle lock button and rotate the blade bolt
until the spindle locks.
 Using the wrench provided, loosen and remove the blade
bolt.
NOTE: The blade bolt has left hand threads. Turn blade
bolt clockwise to loosen.
 Remove the laser guide. Do not remove the inner blade
washer.
 Wipe a drop of oil onto the inner blade washer and the
outer blade washer or laser guide where they contact the
blade.
WARNING:
If inner blade washer has been removed, replace
it before placing blade on spindle. Failure to do
so could cause an accident since blade will not
tighten properly.
 Fit saw blade inside upper blade guard and onto spindle.
The blade teeth point downward at the front of saw as
shown in figure 13.
CAUTION:
Always install the blade with the blade teeth and
the arrow printed on the side of the blade pointing
down at the front of the saw. The direction of blade
rotation is also stamped with an arrow on the upper
blade guard.
sCrew
blaDe
laser guiDe or
outer blaDe
washer
blaDe
bolt
to
loosen
to
tighten
 Replace the laser guide. The double "D" flats on the blade
washers align with the flats on the spindle.
 Depress spindle lock button and replace blade bolt.
NOTE: The blade bolt has left hand threads. Turn blade
bolt counterclockwise to tighten.
 Tighten blade bolt securely.
 Lower the blade guard and blade bolt cover.
 Replace screw and tighten securely.
17
lower
blaDe
guarD
blaDe bolt
inner blaDe
washer
inner blaDe washer
with Double "D" Flats
Cover
Fig. 13