Specifications

Fig. 16. Slip the spacers between two cutters.
Position the outer section properly, with the spacers
between the cutters on the chain. Tap it into place.
The Adjusting Knob
Place the nylon washer and serrated washer onto the knob
shaft. Insert the knob shaft through the slot in the outer
section then the bar slot and screw into the threaded hole.
Chain Tensioning
Slide the D-8 back all the way to the guard/deflector and
check the chain tension. If the chain needs tensioning,
l
oosen the bar nuts and the adjusting knob. Adjust the
chain tension as needed, using the ball driver.
Fig. 17 Use the ball-driver to tension the chain.
Retighten the bar nuts, then slide the D-8 out to its full
extension.
Your Cutters Edge Fire Rescue Saw with the D-8 Guard/
Depth Gauge installed is now ready for use.
NOTE
For detailed instructions on the uses and applica-
tions of ventilation saws, please refer to your
Cutters Edge Fire Rescue Saw Operations and
Maintenance Manual.
Operation of the D-8
OPERATION & MAINTENANCE / 13
You can now adjust the D-8 to various depths of cut. If the
saw is running, first set the saw's chain brake. Then loosen
the adjusting knob. Slide back the outer section of the D-8
to the desired setting on the depth scale. Retighten the
adjusting knob and release the chain brake. You are ready
to cut.
Fig. 18.
Set the D-8 to the necessary depth.
NOTE
Since the D-8 completely covers the cutting chain
when it is fully extended, you can now start your
saw on the ground and then carry it up to the roof
while it is running. This eliminates the need to re-
start the saw after you are in position on the roof.
I nspection Cut
On the roof, first make an inspection cut to determine the
thickness of your roofing materials. Slide back the D-8 to
i
ts fully retracted position, then make the inspection cut as
you normally would, keeping the saw at ninety degrees to
the rafter, feeling for and rolling the rafter.
Set your chain brake. Visually determine the thickness of
the roofing materials and then adjust the D-8 to the
necessary setting. Release the chain brake and make
your ventilation cuts.
Cutting deeper than the D-8 setting
Even with the D-8 set to a pre-determined depth you can
i
ncrease the depth of your cut-without changing the set-
ting-by increasing the angle of the saw to the roof sur-
face. While cutting at the normal forty-five degree angle,
the saw will cut to the depth you have set. But by raising
the angle of the saw up to ninety degrees, you can cut up
to one-half inch deeper for every one inch you have set on
the D-8 scale.