Mixing The Material; Using The Drum - Toro CM Series Operator's Manual

Mixing the Material

DANGER
Eye and skin contact with concrete materials and
breathing the dust involved is hazardous to your
health.
• Ensure that there is adequate air ventilation.
• Wear a dust mask to prevent inhalation of dust
while using the machine; refer to
Practices (page 4).
• Avoid direct contact of cement and concrete
materials with skin and eyes.
Important: Do not add more material than the batch
capacity for your specific machine model; refer to
Specifications (page 15).
Note: Follow the manufacturer's instructions that are printed
on the packaging of the product that you are using.
Concrete has the following 4 basic ingredients:
•
Sand
•
Gravel
•
Portland cement
•
Water
Depending on the application, you can use different ratios
of these 4 ingredients.
There are many variations of concrete mix recipes, depending
on the application. It is important to use the appropriate
quantity of water. Using too little water results in dry areas in
the mix, but using too much water results in weaker concrete.
The amount of water needed varies depending on moisture
content of the sand and gravel. The mix should have a
thickness similar to peanut butter.
Keep the poured concrete damp for several days to obtain
proper curing. Evaporation results in weaker concrete.
Concrete cures through hydration, a reaction between water
and cement.
Before you mix material, complete the following:
1. Move the machine to a level job-site location.
2. Remove the machine from the tow vehicle.
3. Secure the machine from movement.
4. Ensure that the drum is in the mix position (upright).
5. Engage the drum latch and ensure that it does not
rotate toward the dump position.
Mixing Pre-Mix Concrete
1. Ensure that the tilt brake is fully engaged and that the
2. Pour water into the drum.
3. Add the required amount of dry pre-mix.
4. Allow the drum to turn while the mix reaches the
Mixing Sand, Gravel, and Cement
Safe Operating
The typical ratio for mixing concrete is 1 part Portland
cement, 2 parts sand, and 3 parts gravel.
1. Ensure that the tilt brake is fully engaged and that the
2. Pour water into the drum.
3. Add the required amount of gravel.
4. Add the required amount of Portland cement.
5. Add the required amount of sand.
6. Allow the drum to turn while the mix reaches the
Note: Adding water and gravel before cement and sand
allows the mix left in the drum from the previous batch to be
tumbled off the drum and paddles and into the next batch.

Using the Drum

Contact with the mixing paddles could cause
damage or injury.
Never put your hands inside the drum at any time.
Dumping the Drum
Note: When dumping a batch of material, leave the engine
running so that the rotating drum helps dump the material.
1. Align a wheelbarrow or similar container of adequate
2. While the drum is turning, firmly grasp the handwheel
3. Using your other hand, pull upward on the
4. Use 2 hands to slowly turn the handwheel, allowing
5. Turn the handwheel in the opposite direction to return
6. Push down on the drum-tilt brake to lock the drum
7. After dumping a batch of material, clean the drum;
26
drum is operating at full speed.
appropriate consistency.
drum is operating at full speed.
appropriate consistency.
DANGER
capacity in the path of the drum opening.
with 1 hand.
drum-tilt-brake handle to release the brake.
the drum to tilt in the desired direction and dump the
desired amount of material.
the drum into an upright position.
into position, avoiding accidental discharging of
concrete mix.
refer to Cleaning the Drum (page 27).