1
/
4
". Firmly tighten belt guard bracket bolts. Confirm
that gap between belt guard and drum is less than
1
/
4
"
to prevent fingers and other objects from being pulled
into the belt and pulley. Adjust if necessary.
Figure 18 – Belt Removal
Motor Thermal Overload
1. The motor is equipped with a thermal overload that
turns OFF the motor if it gets too hot.
(See Figure 19.)
2. To reset the thermal overload, unplug machine, turn
ON/O-OFF/REV switch to the O-OFF position and
allow the motor to cool for 15 minutes.
3. Press the reset button. If motor does not start or the
thermal overload continually trips during normal op-
eration, the machine should be taken to a RIDGID
Independent Service Center.
278-109-441.10_REV. B
14
K-750R Drain Cleaning Machine
2. Connect the male coupling of the cable to the pigtail
coupling
(See Figure 17)
. Confirm connection is se-
cure.
3. Pull short sections of cable from the carton and man-
ually feed into the drum. Do not turn machine ON.
Figure 17 – Connecting/Disconnecting Drum machine Cable
Coupling
Belt Removal/Installation
1. Remove belt guard
(See Figure 3)
. Do not operate
drain cleaner with belt guard removed.
2. Push down on motor table handle to release belt
tension and slip belt off pulley.
(See Figure 18.)
3. Remove manual feed assembly by removing the bolt.
4. Slide the belt off the machine, between the guide
tube and the frame.
5. Reverse procedure to replace belt.
6. Adjust gap between guard and drum to less than
Keep couplings clean and lubricated. Plunger pin must
move freely and fully extend to secure connection.
New style – Plunger pin
Screwdriver required.
Connecting
1. Slide the couplings together. If needed, depress
plunger pin.
2. Confirm connection is secure. (plunger pin fully ex-
tended).
Disconnecting
1. Insert the screwdriver to depress the plunger pin.
2. Push the couplings apart until the male coupling
contacts the screwdriver.
3. Remove the screwdriver and push the couplings
apart.
1
2
1
3a
3b
2
