The general operating steps for the FlexShaft Drain Cleaning Machines (see below):
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1. Advance the chain knocker (generally not
rotating) to the area of the drain that needs
cleaned.
2. If there is a blockage, pass the chain
knocker through the blockage.
3. If possible, start a flow of water through the
drain to carry cuttings and debris away as
the drain is cleaned.
Figure 16 – General Operating Steps with Chain Knocker
Only rotate the cable/chain knocker when
the chain knocker is at least 1' in the drain.
To rotate the cable, firmly grip the drill han-
dle and depress the drill switch. The per-
son controlling the cable assembly must
also control the drill switch. Do not operate
the machine with one person controlling
the cable assembly and another person
controlling the drill. Do not allow cable
assembly to build up outside the drain,
bow or curve. This can lead to twisting,
kinking and breaking of the cable. At any
time, release the drill trigger to stop cable
rotation. When clearing blockages, operate
the cable at full speed for best cleaning.
Do not force the chain knocker into
blockages. In some cases, using variable
speed will assist with navigating turns.
Rotating the chain knocker in FORWARD
or REVERSE for a short time while ad-
vancing the cable assembly can help it
negotiate the drain and blockages.
10. Advance the cable assembly into the drain,
generally not rotating. Grasp the sheath
near where it exits the machine housing.
Pull 6" to 12" (150 to 300 mm) of cable
assembly out of the FlexShaft Machine
so that there is a slight bow in the cable.
Gloved hand must be on cable assembly
999-995-413.10_REV. B
K9-12 FlexShaft
Drain Cleaning Machine
®
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4. Rotate the cable/chain knocker at full speed.
5. Continue to rotate knocker. Gradually with-
draw the cable assembly so that the chain
knocker can break up the blockage.
6. Continue to gradually withdraw the cable
assembly while rotating so that the chain
knocker can clean the walls of the drain.
to control and support. Improper cable
support can allow the cable assembly to
kink or twist and can damage the cable or
injure the operator. Feed the cable assem-
bly into the drain (Figure 16, Step 1).
11. Continue to advance the cable assem-
bly until the resistance is encountered.
Carefully work the chain knocker through
the blockage. Do not force the cable
assembly – if the chain knocker cannot
turn, it cannot clean the drain. Pay at-
tention to how far the cable has gone. Do
not overrun the cable into a larger drain.
This can cause the cable to knot up or
cause other damage (Figure 16, Step 2).
12. If possible, start a flow of water down the
drain to flush the debris out of the line
and help clean the cable assembly as it is
retrieved. This can be done by turning on a
faucet in the system or other methods. Pay
attention to the water level, as the drain
could plug again (Figure 16, Step 3).
13. With the chain knocker past the blockage/
area to be cleaned, fully depress the drill
switch to rotate the chain knocker. Slowly
pull the cable assembly from the drain, al-
lowing the rotating chain knocker to clean
the drain walls and break up the blockage
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