MM-12511H-S Mortar Mixer

Check with your local county or state towing safety regulations before towing the machine.

• To reduce the possibility of an accident while transporting the machine on public roads, ensure that the towing vehicle is mechanically sound and in good operating condition.

• Shut off the engine and the fuel valve before transporting the machine.

• When towing with a ball hitch, ensure that the ball hitch you are using is the proper size for the hitch coupler on the machine.

• When towing with a pintle hitch, ensure that the eye of the tow pole is the correct dimension for the pintle hook.

• Do not tow without the safety pin inserted into the top of the receiver.

• Inspect the hitch and coupling for wear. Never tow the machine with damaged or defective hitches, couplings, chains, or other components.

• Check the tire air pressure on the towing vehicle and the machine.

• Check the tire tread and sidewall for damage and wear.

• Properly attach the safety chains to the towing vehicle.

• Ensure that the directional and brake lights are working properly (if the machine is equipped with the light kit).

• Ensure that the directional, backup, and brake lights of the tow vehicle are working properly (if equipped).

• Before towing, ensure that your machine is correctly and securely attached to the towing vehicle.

• Ensure that the safety chains are properly secured to the vehicle, and leave enough slack for turning.

• Do not carry any material in the machine when towing.

• Avoid sudden stops and starts. This can cause skidding, or jackknifing. Smooth, gradual starts and stops will improve towing.

• Avoid sharp turns to prevent rolling. Tow only with a vehicle that has a hitch designed for towing. Do not attach towed equipment except at the hitch point.

• Do not tow the machine faster than 88 km/h (55 mph).

• Use caution when backing up; use a spotter outside the vehicle to guide you.

• Do not allow anyone to sit or ride on the machine.

• Disconnect the machine from the tow vehicle before using it.

• Secure the machine from movement before you tow it.

• Place chock blocks underneath the tires to prevent them from rolling while the machine is parked.

• Use your full attention while operating the machine. Do not engage in any activity that causes distractions; otherwise, injury or property damage may occur.

• Never run the engine in an enclosed or poorly ventilated area.

• Operate the machine only in good lighting conditions.

• Before starting the machine, ensure that there are no persons or obstacles near or under the machine.

• Shut off the engine before leaving the machine for any reason.

  Never leave a running machine unattended. Always shut off the engine and verify that all moving parts have stopped.

• Chock the tires of the machine or keep it attached to the towing vehicle when it is not in use, to prevent it from rolling.

• Avoid prolonged breathing of exhaust fumes. Engine exhaust fumes can cause sickness or death.

• Keep your hands away from any moving parts. Keep your feet away from the tires and the front post.

• Do not operate the machine while ill, tired, or under the influence of alcohol or drugs.

• Keep bystanders, especially small children, out of the operating area. Stop the machine if anyone enters the area.

• Never place your hands or any solid object into the drum when the machine is in operation.

• Do not touch parts which may be hot from operation. Allow them to cool before attempting to maintain, adjust, or service the machine.

• Never move the machine while the engine is running.

• Keep the cowl closed and latched during operation.

• Ensure that all the guards and shields are securely in place before operating the machine.

• If the mixing paddles strike a foreign object or if the machine should start making an unusual noise or vibration, shut off the engine and empty the drum. Wait for all moving parts to come to a complete stop and cool. Vibration is generally a warning of trouble. Inspect for clogging or damage. Clean and repair and/or replace damaged parts.

• Do not change the engine governor setting or overspeed the engine.

• Lightning can cause severe injury or death. If you see lightning or hear thunder in the area, do not operate the machine; seek shelter.

• Before performing maintenance, do the following:

  • Park the machine on a level surface.

  • Shut off the engine and fuel valve. Wait for all movement to stop and remove the spark-plug wire before adjusting, cleaning, or repairing.

  • Allow the engine to cool before performing maintenance or storing.

  • Disengage all power and operation controls before making any repairs.

• Never lubricate, service, repair, or adjust the machine while it is running.

• Keep equipment materials clear from the muffler and engine to help prevent fires. Wipe up any spilled oil or fuel.

• Never allow untrained personnel to service the machine.

• Keep your hands, feet, and clothing away from moving parts. If possible, do not make adjustments with the engine running.

• Keep all parts in good working condition and all hardware tightened. Replace all worn or damaged decals.

• Remove any buildup of grease, oil, or debris from the machine.

• Stop the machine, shut off the engine, and inspect the machine if a foreign object enters the drum or causes another obstruction. Make any necessary repairs before starting the machine.

• Do not tamper with safety devices.

• Secure the machine from movement and chock the tires when storing the machine.

• Keep all nuts, bolts, screws, and hose clamps securely tightened. Keep the machine in good condition.

• Use only genuine Toro replacement parts to ensure that the original standards are maintained.

1. Cut the cable ties to remove the dump handle from the underside of the grate.

2. Position the dump handle so that the bolt holes align with the bolt holes in the drum (Figure 3, Figure 4, or Figure 5).

   

   Figure 3

   Models 68013, 68016, 68020

   

   Figure 4

   Models 68014, 68017, 68021

   

   Figure 5

   Model 68024

3. Insert the 2 bolts through the bolt holes in the dump handle and the drum (Figure 3, Figure 4, or Figure 5).

4. Install a nut onto each bolt and tighten them by hand to prevent cross-threading.

5. Tighten the nuts with a wrench while using another wrench to keep the bolts from spinning.

Note: The tow pole is purchased separately and includes the nut and bolt needed for installation.

The machine has the following tow pole options:

1. Remove the bolt and nut from the tow pole (Figure 6).

   

   Figure 6

   1. Tow pole
   2. Front post
   3. Bolt
   4. Bolt hole
   5. Frame fitting
   6. Nut

2. Slide the tow pole forward and align the hole in the pole with the hole in the frame fitting (Figure 6).

3. Insert the bolt through the holes in the fitting and the pole (Figure 6).

4. Thread the nut onto the bolt and tighten them until they are tight against the frame fitting (Figure 6).

   Note: If the self-locking nylon insert in the locknut wears with use, replace the nut with a new Grade 5 or Grade 8 locknut.

The DOT tire information is located on the side of each tire. This information gives load and speed ratings. Replacement tires should have the same or better ratings. For more information go to http://www.nhtsa.gov/Vehicle+Safety/Tires.

Note: The various machines in this manual have different weights; refer to Specifications to ensure that the tires on your machine meet or exceed the weight requirements of your machine.

1. Visually inspect the tires for damage and wear (Figure 19 and Figure 20).

   

   Figure 19

   1. Example of tire wear caused by underinflation
   

   Figure 20

   1. Example of tire wear caused by overinflation

2. Ensure that the tires are inflated to the correct air pressure. The following table shows the appropriate air pressure for the tires as installed at the factory.

   Important: Always check the information on the actual tires for the correct air pressure requirement.

   Important: The most common cause of tire trouble is under-inflation. Maintain full air pressure.

   Tire Air Pressure

   Model	Tire pressure
   68013, 68014, 68016, and 68017	Max 414 kPa (60 psi)
   68020, 68021, and 68024	Max 241 kPa (35 psi)

3. Ensure that the wheel lug nuts are torqued to 108 to 122 N∙m (80 to 90 ft-lb).

   Note: Check the torque of the wheel lug nuts initially and after towing.

   Note: Torque the lug nuts in the sequence shown in Figure 21.

   

   Figure 21

1. Apply chassis grease to the socket of the coupler and the area of the clamp that contacts the ball.

2. Oil the pivot points and sliding surfaces of the coupler with SAE 30 motor oil.

3. Hitch the machine as shown in Figure 22.

   

   Figure 22

4. If the machine is equipped with a trailer-light kit, connect the wire plug of the tow vehicle to the wire plug of the machine.

1. Apply removable thread-locking compound to the threads of the coupler bolt to prevent the coupler handle from coming loose.

   Important: Apply thread-locking compound as needed in the future.

2. Apply chassis grease to the socket of the coupler and the area of the clamp that contacts the ball.

3. Install hitch the machine as shown in Figure 23.

   

   Figure 23

   Note: Use a wrench to keep the bolt from spinning.

4. If the machine is equipped with a trailer-light kit, connect the wire plug of the tow vehicle to the wire plug of the machine.

1. Hitch the machine as shown in Figure 24.

   

   Figure 24

2. If the machine is equipped with a trailer-light kit, connect the wire plug of the tow vehicle to the wire plug of the machine.

1. Pull the safety chain through the slots in the keyholes, so that the lengths on each side are equal.

2. Cross both lengths of chain under the tow pole.

   Note: Crossing the chains decreases the chances of the front of the machine dropping to the ground if the hitch does not hold the connection.

   

   Figure 25

   1. Connecting links
   2. Keyholes in front post
   3. Chain crossed under tow pole

3. Connect each length of chain to the safety chain mounting point on the tow vehicle with the connecting links (Figure 26).

   Important: Ensure that the chain has enough slack for turning around corners when towing the machine.

   Note: Stow the excess chain inside the bottom of the front post by pushing it into the keyholes and latching the appropriate links into the keyhole slots.

   

   Figure 26

   1. Connecting link
   2. Safety chain mounting point on tow vehicle
   3. Chain link
   4. Chain

1. Move the machine to a level surface.

2. Disconnect the machine from the tow vehicle.

3. Secure the machine from movement.

4. Ensure that the drum is empty and in the mix position (upright).

5. Ensure that the drum latch is engaged and that the drum does not rotate toward the dump position.

1. Align a jack with an adequate lift height and weight capacity under the axle; refer to Specifications.

2. Lift the machine until the tires are off the ground.

3. Use a jack stand at each support point on the rear frame extension (Figure 27).

   

   Figure 27

   1. Support point (2)

4. Remove the bolts and nuts that secure the inner axle to the outer axle (Figure 28).

   

   Figure 28

   1. Wide position (towing)
   2. Narrow position
   3. Nut—wide position
   4. Nut—narrow position
   5. Bolt—wide position
   6. Bolt—narrow position

5. Align the inner axle to the desired position as follows:

   • Slide each side of the axle inward to the narrow position (Figure 28).

   • Slide each side of the axle outward to the wide (tow) position (Figure 28).

6. Align the holes of the inner axle with the holes of the outer axle.

7. Insert the bolts through the axle holes (Figure 28).

8. Thread the nuts onto the bolts, and torque the nuts to 87 N∙m (64 ft-lb).

Use a fuel stabilizer/conditioner in the machine to provide the following benefits:

• Keeps fuel fresh during storage of 90 days or less. For longer storage drain the fuel tank.

• Cleans the engine while it runs

• Eliminates gum-like varnish buildup in the fuel system, which causes hard starting

  Important: Do not use fuel additives containing methanol or ethanol.

  Add the correct amount of fuel stabilizer/conditioner to the fuel.

  Note: A fuel stabilizer/conditioner is most effective when mixed with fresh fuel. To minimize the chance of varnish deposits in the fuel system, use fuel stabilizer at all times.

1. Park the machine on a level surface, shut off the engine, and allow the engine to cool.

2. Clean around the fuel cap and remove it (Figure 31).

   

   Figure 31

   1. Fuel cap

3. Add fuel to the fuel tank, until the level is at the bottom of the maximum fuel level, as shown in Figure 32.

   Important: This space in the tank allows the fuel to expand. Do not fill the fuel tank completely full.

   

   Figure 32

   1. Maximum fuel level

4. Install the fuel cap securely (Figure 31).

5. Wipe up any spilled fuel.

1. Ensure that there is no old, loose material in the drum that can contaminate the batch of material; refer to Cleaning the Drum and Dumping the Drum, then return the drum to the upright position.

   Note: Ensure that the drum is in the mix position (upright) and the drum latch is engaged.

2. Move the clutch lever to the OFF position.

3. Start the engine.

   Note: Allow the engine to warm up at 2/3 throttle for 1 to 2 minutes.

4. Set the throttle lever on the engine to the MAX position.

5. Move the clutch lever to the ON position.

6. Add the ingredients for the batch as follows:

   1. Pour water into the drum through the grate.

   2. Add the plaster, cement, or other binding material.

      Note: You can open bags of cement, plaster, and binding materials by lowering the bag onto the bag splitter (Figure 37).

      

      Figure 37

   3. If you are using sand and/or other reinforcing materials, add them into the drum.

7. Allow the paddles to mix the material until the ingredients have a uniform appearance.

   Note: If needed, add water or plaster, cement, or other binding material until the consistency of the batch is correct.

8. Release the drum latch and dump the drum; refer to Dumping the Drum.

Note: When dumping a batch of material, leave the engine running and the clutch in the ON position so the rotating paddles help discharge the material.

1. Align a wheelbarrow or similar container of adequate capacity in the path of the drum opening.

2. Grasp the dump handle with your left hand (Figure 38).

   

   Figure 38

   1. Dump handle—Mix position
   2. Drum latch—Release position
   3. Drum latch—Locked position
   4. Dump handle—Dump position

   Note: When dumping a batch of material, align a wheelbarrow or a similar container of adequate capacity beneath the chute.

3. Lift the handle of the drum latch (Figure 38).

4. With both hands on the dump handle, rotate it counterclockwise to discharge the contents of the drum (Figure 38).

   Note: Allow the machine to completely discharge the contents of the drum.

5. Rotate the dump handle clockwise until the drum latch locks the drum in the upright position (Figure 38).

6. After discharging a batch of material, clean the drum; refer to Cleaning the Drum.

   Note: This step cleans the paddles and drum between batches and prevents dried material from forming and contaminating the next batch of material.

Important: Do not strike on the drum with a shovel, hammer, or any other device to loosen any accumulated dried materials.

1. Stop the rotation of the paddles by moving the clutch lever to the OFF position.

2. Rotate the engine On/Off switch to the OFF position.

3. Ensure that the drum is in the mix position (upright).

4. Spray the machine with water to remove any accumulated material.

5. Start the engine.

6. Start the rotation of the paddles by moving the clutch lever to the ON position.

7. Dump the drum.

1. Park the machine on a level surface and shut off the engine.

2. Remove the machine from the tow vehicle.

3. Secure the machine from movement.

4. Open the rear cowl; refer to Opening the Cowl.

5. Ensure that the engine and muffler are cool.

6. Disconnect the spark-plug wire; refer to Figure 46.

Pull the spark-plug wire off the terminal of the spark plug (Figure 46).

Figure 46

1. Spark plug

You need to remove the divider plate to provide access before performing some maintenance procedures.

Note: Model 68024 does not have a divider plate.

Note: The pillow-block bearings are inside the cowl—remove the divider plate to access them; refer to Removing the Divider Plate.Model 68024 does not have a divider plate.

Grease Type: No. 2 lithium grease.

1. Clean around each grease fitting with a rag and lift the plastic cap off the grease fitting (Figure 49).

   

   Figure 49

   1. Pillow-block bearings
   2. Rear trunnion
   3. Front trunnion

2. Pump grease into each fitting as follows:

   • For the pillow-block bearings, pump 1 shot of grease into each fitting (Figure 49).

   • For the trunnions, pump several shots of grease into each fitting until it starts to ooze out of the bearing housing (Figure 49).

   Important: Pump grease in slowly and carefully to prevent damage to the bearing seals.

3. Wipe up any excess grease.

Important: Do not operate the engine without the air-filter assembly; extreme engine damage will occur.

1. Shut off the engine and wait for all moving parts to stop.

2. Disconnect the wire from the spark plug; refer to Disconnecting the Spark-Plug Wire.

3. Remove the nut that secures the cover ().

   

   Figure 50

   1. Cover nut
   2. Cover
   3. Wing nut
   4. Foam element
   5. Paper element
   6. Base

4. Remove the cover.

   Note: Be careful to prevent dirt and debris from falling into the base.

5. Remove the foam and paper elements from the base ().

6. Remove the foam element from the paper element ().

7. Inspect the foam and paper elements and replace them if they are damaged or excessively dirty.

   Note: Never try to brush dirt off the paper element; brushing forces the dirt into the fibers.

8. Clean the foam element in warm, soapy water or in a nonflammable solvent.

   Note: Do not use fuel to clean the foam element because it could create a risk of fire or explosion.

9. Rinse and dry the foam element thoroughly.

10. Dip the foam element in clean engine oil, then squeeze out the excess oil.

    Note: Excess oil in the foam element restricts the air flow through the element and may reach the paper filter and clog it.

11. Wipe dirt from the base and the cover with a moist rag.

    Note: Be careful to prevent dirt and debris from entering the air duct leading to the carburetor.

12. Install the air-cleaner elements and ensure that they are properly positioned.

13. Securely install the cover with the nut.

Toro Premium Engine Oil is available from your Authorized Service Dealer.

Important: Use 4-cycle engine oil that meets or exceeds the requirements for API service category SJ, SL, SM, or higher.

Important: If the oil level in the crankcase is too low or too high and you run the engine, you may damage the engine. This type of damage is not covered by the warranty.

Note: Use SAE 10W-30 for general use. You can use the other viscosities shown in the chart when the average temperature in your area is within the indicated range (Figure 51).

Figure 51

Type: NGK BPR6ES or equivalent

Gap: 0.7 to 0.8 mm (0.028 to 0.031 inch)

Note: Use a 21 mm (13/16 inch) spark-plug wrench for removing and installing the spark plug.

Checking the Spark Plug

Important: Do not clean the spark plug. Always replace the spark plug when it has: a black coating, worn electrodes, and oily film, or cracks.

Note: If you see light brown or gray on the insulator, the engine is operating properly. A black coating on the insulator usually means that the air cleaner is dirty.

Set the gap to 0.7 to 0.8 mm (0.028 to 0.031 inch).

Figure 56

Underneath the fuel valve is a sediment cup to catch dirt in the fuel.

1. Park the machine on a level surface and shut off the engine.

2. Ensure that the engine and the exhaust system surfaces are cool.

3. Move the lever of the fuel valve to the OFF position, all the way to the left (Figure 62).

4. Unscrew the sediment cup (Figure 62).

5. Remove and retain the fuel filter and O-ring (Figure 62).

   Note: Do not clean the O-ring in solvent.

   

   Figure 62

   1. Fuel valve—Off position
   2. O-ring
   3. Fuel filter
   4. Sediment cup

6. Clean the fuel filter and sediment cup using a nonflammable solvent, and dry it carefully.

7. Wipe the O-ring with a clean, dry cloth.

8. Install the fuel filter in the bottom of the carburetor (Figure 62).

9. Align the O-ring in to the groove in the sediment cup and install the sediment cup to the fuel-valve housing.

10. Move the lever of the fuel valve to the ON position (all the way to the right) and check for leaks. If it leaks, replace the O-ring.

1. Remove the engine; refer to Removing the Engine.

2. Remove the fuel cap by rotating it counterclockwise (Figure 63).

   

   Figure 63

3. Align a drain pan to the hinge of the engine deck.

4. Rotate the engine on the hinge side of the engine deck and drain the fuel from the tank (Figure 64).

   

   Figure 64

5. Carefully lower the engine and engine deck.

6. Install the fuel cap.

7. Install the engine; refer to Installing the Engine.

Important: Use 4-cycle motor oil that meets or exceeds the requirements for API service category SJ, SL, SM, or higher.

Important: If the oil level in the reduction case is too low or too high and you run the engine, you may damage the engine or the reduction case. This type of damage is not covered by the warranty.

Oil type: SAE 10W-30 motor oil

Reduction case capacity: 1.2 L (40 fl oz)

1. Remove the divider plate; refer to Removing the Divider Plate.

2. Place a straightedge across the face of the engine pulley and the idler pulley (Figure 76).

   

   Figure 76

   1. Engine pulley
   2. Idler pulley
   3. Straightedge
   4. Idler shaft
   5. Locknut
   6. Setscrew

   Note: Both pulleys must be aligned flush with the straightedge.

3. If the pulleys are not aligned do the following:

   1. Move the clutch lever to the OFF position.

   2. Loosen the locknuts and setscrews that secure the idler pulley to the idler shaft (Figure 76).

   3. Using a soft-face mallet, tap the idler pulley forward or backward along the idler shaft until the engine pulley and the idler pulley are aligned to the straight edge (Figure 76).

   4. Tighten the setscrews and locknuts that secure the idler pulley to the idler shaft (Figure 76).

4. Install the divider plate; refer to Installing the Divider Plate.

Regular cleaning and washing with mild detergent and water increases the life span of the machine. Clean the machine after each use before the dirt hardens.

Remove dirt and grime from the external parts of the entire machine, especially the engine. Clean dirt and concrete materials from the outside of the engine.

Ensure that the fuel cap and the oil-fill cap/dipstick are secure to avoid getting water in the engine.

Use care when using a high-pressure sprayer because it can damage safety decals, instruction signs, and the engine.

Important: Lubricate the trunnions after cleaning; refer to Lubricating the Bearings and Seals.