Passing Through Traps Or Other Transitions; Working The Blockage; Handling A Stuck Tool/Cable End - RIDGID K-750R Manual

the cable with gloved hands. Do not allow the cable to build
up outside the drain, bow or curve. This can allow the cable
to twist, kink or break.
When the cable has been fed into the drain opening, pull
6"-12" (150 mm - 300 mm) more cable from the drum
and continue feeding the rotating cable into the drain.
Figure 12 – Feeding of the Cable
Passing Through Traps Or Other
Transitions
If it is difficult to get the cable through a trap or other fitting,
the following methods or combinations of methods can be
used.
• Sharp thrusts of the cable, both with and without the
cable rotating, can help the cable through a trap.
• In some cases, with the switch in the O-OFF posi-
tion, rotating the drum by hand can change the ori-
entation of the cutter to allow it to more easily
negotiate the fitting.
• Run the drain cleaner in REV (REVERSE) rotation
for several seconds while pushing on the cable.
Only do this long enough to get the cable started
through the trap. Running the cable in reverse can
damage the cable.
• Use a flexible leader between the tool and the
cable.
If these options don't work, consider using a smaller di-
ameter or more flexible cable, or a different drain cleaner.
Cleaning The Drain
As you feed the cable into the drain, you may see the
cable slow down or build up outside the drain. Always
keep your hands on the cable. You may feel the cable
start to wind or load up (this may feel like the cable is start-
ing to twist or squirm). This may be a transition in the drain
(trap, elbow, etc.), build up in the drain (grease, etc.) or the
actual blockage. Feed the cable slowly and carefully. Do
278-109-441.10_REV. B
K-750R Drain Cleaning Machine
not let cable build up outside the drain. This can cause the
cable to twist, kink or break.
Pay attention to the amount of cable that has been fed into
the drain. Feeding cable into a larger drain, septic tank or
similar transition may cause the cable to kink or knot
and prevent removal from the drain. Minimize the amount
of cable fed into the transition to prevent problems. Each
wrap of the cable in the drum is approximately four feet
(1.2 m) long.

Working The Blockage

If the end of the cable stops turning, it is no longer clean-
ing the drain. If the end of the cable becomes lodged in
the blockage and power is maintained to the drain cleaner,
the cable will start to wind up (this may feel like the cable
is starting to twist or squirm). Having a hand on the cable
allows you to feel this wind up and control the cable. If the
cable end stops turning or if the cable starts to wind up,
immediately pull back on the cable to free the cable end
from the blockage.
Don't keep the cable rotating if the cable is stuck in a
blockage. If the cable end stops turning and the drum
keeps rotating, the cable can twist kink or break.
Once the cable end is free of the blockage and turning
again, you can slowly feed the cable end back into the
blockage. Do not try to force the cable end through the
blockage. Let the spinning end "dwell" in the blockage to
completely break it up. Work the tool in this manner until
you have moved completely past the blockage (or block-
ages) and the drain is flowing.
While working the blockage, the cable and tool may
become clogged with debris and cuttings from the block-
age. This can prevent further progress. The cable and
tool need to be retrieved from the drain and the debris re-
moved. See section on "Retrieving the Cable".

Handling A Stuck Tool/Cable End

If the tools stops turning and the cable cannot be pulled
back from the blockage, release the foot switch while
firmly holding the cable. Do not remove hands from cable
or cable may kink, twist and break. The motor will stop and
the cable and drum may turn backwards until the en-
ergy stored in the cable is relieved. Do not remove hands
from cable until the tension is released. Place FOR/O-
OFF/REV switch in O-OFF position.
The torque limiter helps to prevent cable damage from
cable flip over in the drum by stopping drum and cable ro-
tation when the torque exceeds the setting. The motor will
continue to rotate as long as the foot switch is pressed, but
the drum and cable will stop rotating when the torque lim-
iter setting is exceeded. The torque limiter cannot prevent
all cable damage in the drum, and cannot prevent cable
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