Maintenance - IMER MIX 750 Operating, Maintenance, Spare Parts Manual

-Start the motor, following the instructions contained in the motor
manual.
-Allow the motor to warm up at reduced rpm.
-Increase the rpm to maximum using the accelerator lever mounted
on the frame.
Machines with an endothermic motor are fitted with a centrifugal
expanding clutch mounted on the motor.
The clutch enables the paddle rotation speed to be increased
gradually, which can be stopped when the motor is operating at
minimum rpm.
Motor operating speed can be controlled by means of the
accelerator lever (rif. 5, tab. 9).
9.2 WORKING CYCLE
WARNING! Check that the machine stops
rotating when the tank protection cover is lifted.
Start-up the machine with the tank empty.
-With the water supply connected to the mains, start feeding
water by opening the valve mounted on the tank, and add the
cement and aggregate.
-The tank protection grid is fitted with a bag splitter to enable pre-
packed mixes to be used.
-When the mix has reached the required consistency, place a
suitable container under the outlet and, keeping the paddles moving,
open the outlet using lever Ref. 1 (see Fig. 9).
Lift the lever to position A and push it as far as possible to
position B.
To close the outlet, return the lever to Pos. C.
Avoid starting the machine with a full load.
Do not overfill the tank (see 3. MIXING CAPACITY).
10. EMERGENCY STOP
In the event an electric motor fault, press the
OFF pushbutton (Ref. 17 Fig. 1) and disconnect the mixer
from the power supply.
In the case of endothermic motors, move the acceleration lever
to the minimun position.
The motor is protected from thermal overloads. If it
overheats it will stop. It must be allowed to cool before
restarting.

11. MAINTENANCE

WARNING! Before carrying out any form of
maintenance work, always switch off the mixer.
-Replace worn or faulty components using original spare parts.
-Check the oil level through the transparent level indicator on
the side of the reduction gear casing.
-Change the oil in the reduction gear with SAE 90 oil after 2000
hours of work (approximately 0.9 Kg).
-To top up or replace the oil, used the filler pipe (ref. 1, fig. 10). Lift
the motor casing to gain access to the filler.
Used oil is classified as special waste and must be
treated as such in accordance with laws in force.
Always ensure
instructions on the machine are legible.
Always ensure that the protection devices are
undamaged and efficient.
-At the end of the work session, remove dirt and/or any other
deposits formed during mixing by washing thoroughly (to wash
the machine, use the wash-water hose with pressure regulator,
Ref. 54 Tav. 1, mounted on the mixing tank valve).
Check the condition of the power cable before using
the machine; it may have become inadvertently or
unknowingly damaged.
-Check the endothermic motor according to the instructions
contained in the motor manual.
If guards are removed due to maintenance requirements or other
exceptional circumstances, proceed as described below, and
always refit the guards before resuming operation.
11.1 COVER PROTECTION ADJUSTMENT(Fig. 11)
The adjustment of the limit switch must be carried out with the
tank protection cover lowered.
The filling side cover grid opening is protected by a interlocked
that writing and other
MIX 750
cut off device that stops the engine as the protection cover is
lifted, the adjustment is carried out by correcting the lenght of
the wire and re-tighten the screw.
WARNING
Check that the machine stops when the tank protection cover
is lifted
11.2 OUTELET PROTECTION REMOVAL (Réf.Fig.12)
- Slacken screws Ref. 2 and remove protection Ref. 1.
- To replace the protection, align the holes with those of brackets
Ref. 3 and tighten with screws Ref. 2. Use spanner N°13.
11.3 MIXING PADDLE REPLACEMENT (Fig.13)
- Lift the tank protection grid Ref. 1.
- Remove head protection Ref. 2, rotating it in an anti-clockwise
direction.
- Slacken screws Ref. 3 and nuts Ref. 4. Use open-ended spanner
N°17 and Allen key N*6.
- Remove the paddle clamps Ref. 5, 6 and 7 and replace the worn
rubbers Ref. 8, 9 and 10. Inserting the new rubbers between holders
Ref. 11, 12 and 13 and clamps Ref. 5, 6 and 7. Utilize the slots to
adjust as necessary and lock in position with nuts and bolts Ref.
3 and 4.
- Push arm Ref. 14 to manually rotate the paddles in a clockwise
direction, checking the mating of the rubbers with the tank.
- If there are zones where the rubber is not in contact with the
tank, repeat the adjustment. Re-adjust utilizing the slots in brackets
Ref. 15 and 16 if necessary.
- Replace and lock in position protection Ref. 2, rotating it in a
clockwise direction. Lower the cover grid Ref. 1.
11.4 TENSIONING AND REPLACING TRANSMISSION
BELTS
11.4.1 MIXERS FITTED WITH ELECTRIC MOTOR
(Fig. 14)
1. Unscrew the locking screws and lift the motor casing.
Use spanner N°6.
2. To tension the belts, slacken nut Ref. 1, tighten nut Ref. 2 and
re-tighten nut Ref.1. Use spanner N*19.
3. To replace the belts, slacken nut Ref. 23?? and nut Ref. 1,
remove the old belts. Replace them with new belts of same
characteristics. Tension as described in point 2.
4. Lower the casing and lock in position with the locking screws.
11.4.2 MIXERS FITTED WITH ENDOTHERMIC
MOTORS (Fig. 15)
1. Unscrew the locking screws and lift the motor casing. Use
spanner N°17.
2. To tension the belts, slacken nut Ref.1, tighten bolt Ref.2 and
re-tighten nut Ref.1.
3. To replace the belts, slacken nut Ref.1 and bolt Ref.2, remove
the old belts. Replace with new belts of same characteristics.
Tension as described in point 2.
4. Lower the casing and lock in position with the locking screws.
- Check the tension of the transmission belts after 4 hours from
first start-up and after each belt change, otherwise check the
tension every 18-20 hours.
When replacing transmission belts, remember that
a too tight belt will cause damage to shafts and bearings, a
too slack belt will wear out rapidly.
11.4.3 REQUIREMENTS FOR CORRECT
TRANSMISSION BELT TENSIONING (Fig. 16)
To ensure correct tension of the transmission belts, apply a force
F (0.9 kg) on the centre of section S ; distance f should be as
specified in the table in Fig. 16.
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