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K9-12 FlexShaft
™
Drain Cleaning Machine
999-995-413.10_REV. E
12
Installing Brushes
Brushes are available for various uses, such
as cleaning the inside of the pipe, centering
the chain knocker in the pipe and spreading
lining compound. See the specific brush infor-
mation for the types of uses it is appropriate
(See Figure 10B).
Brushes can be assembled in a variety of
configurations, with some options shown in
Figure 12.
Figure 12A – Two Spaced Brushes With A
Chain Knocker In Between
Figure 12B – Two Spaced Brushes
Installation of brushes is similar to the in-
stallation of chain knockers. The collar of the
brush is placed over the cable and retained
by securely tightening the set screws. When
Collar distance can be modified to your
preference for the specific pipe/applica-
tion. As collar distance increases, the di-
ameter of the chains decreases, and vice
versa. Improperly set collar distance can
reduce the efficiency of pipe cleaning.
6. Test fit the chain knocker, knocker bushing
and collar spacer on the cable as shown in
Figure 11. Chains should be straight – do
not assemble with chains twisted. To pre-
vent excessive cable end wear, cable end
should be flush with the end of the collar.
Check length of exposed cable. To reduce
the risk of cable flip over and damage,
exposed cable cannot exceed ¼" (6 mm).
If needed, cut a knocker bushing from
sheath to limit exposed cable. Always use
a knocker bushing to reduce wear on
the sheath end.
7. With the chain knocker correctly installed
on the cable as shown in Figure 11, use
the supplied hex wrench to securely
tighten the collar set screws. Place set
screw tip against cable, then tighten an
additional
1
/
8
to
1
/
4
turn (45° to 90° de-
grees). If the set screws are not secure,
the chain knocker could slip and damage
the cable or be lost down the drain.
Cable Number Number of Nominal Recommended Collar
Size of Chains Links/Chain Pipe Size Distance
1/4"
1 7 1
1
/4" to 1
1
/2" (32 mm to 40 mm) 1
3
/4" (44.5 mm)
2 7 1
1
/2" to 2" (40 mm to 50 mm) 1
3
/4" (44.5 mm)
Collar Distance Chart
Knocker
Figure 11 – Chain Knocker Installation/Adjustment
Sheath End
Collar Spacer
Cable
Set Screw
(3 mm Hex)
Sheath
Collar Distance
Knocker Collar
Knocker Chain
Cable End
Flush To
Collar
Carbide Cutting Tip
(If Equipped)
Knocker Bushing
Knocker Collar
Set Screw
(3 mm Hex)
Exposed Cable
.25" (6 mm)
Maximum
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