6
GB
IMER INTERNATIONAL S.p.A.
SYNTESI 140 - 160 - 190 - 250 - 300 - 350 EL
cy is obtained.
Emptying must be carried out with the mixing drum working, moving
the drum mouth downwards by turning the hand-wheel provided (ref.11,
fig.1).
If part of the batch is left in the drum for later use, it is necessary to leave
the drum turning. In any case, minimise the time the batch stays in the
drum after the required consistency has been reached.
- Do not introduce parts of body and/or tools inside the mixer
drum while it is running.
14. MAINTENANCE
- All maintenance operations must be done by experienced
personnel, after having shut down the motor, disconnected power
supply and emptied the mixing drum.
Every two working months, check the following:
• belt tension.
• signs of wear on the poly-V belt or the pulleys.
• tightening of the screws securing the drum onto the gear unit.
• Clean the ventilation slots and the body of the electric motor to remove
dirt and rubbish.
• lubricate the worm screw and gear teeth with grease.
Check on a weekly basis that the contacts of the plug and socket con-
nector on the electrical panel are clean, dry and free of rust.
If the cement mixer is to be used after standing for a long time outside,
check that the tipping reduction gear is properly lubricated.
14.1
Cleaning
After each daily work session or before long periods of inactivity, the
mixing drum must be cleaned thoroughly both inside and outside.
- Do not start the mixer while carrying out cleaning opera-
tions.
- If the protection guards are removed for cleaning, always
replace them correctly at the end of the cleaning operation.
When using a hose for cleaning, do not direct the spray into the plug-
switch unit.
14.2
Cleaning instructions
Clean the outside of the mixer with a brush and water. Scrape off any
cement or concrete deposits.
There should not be any deposits of cement or concrete inside the drum.
The inside of the drum can be cleaned better if, at the end of the work
session or before a prolonged period of inactivity, the drum is rotated
with a few shovel-fulls of gravel and water. This will prevent any residue
of cement or concrete from hardening.
The mixing drum must not be struck with hard objects such as hammers
or shovels, etc. A dented drum will reduce the mixing effects and make
cleaning more difficult.
14.3
Tensioning the drive belt
1. Switch off the electric motor and disconnect the power plug.
2. Remove the belt guard (ref.A, fig.8) slackening its fastening screws.
3. Loosen the 4 screws (ref.B, fig.4) locking the support of the electric
motor and pull the belt (ref.C, fig.4) by means of the screw (ref.D, fig.4):
if the belt tension is correct, applying a force of approx. F=0.6 Kg at the
centre of the free part of the belt, the resulting camber should be approx.
f=5 mm (fig.9).
- Do not stretch the belt excessively; this will reduce belt life,
as well as the life of the gearbox and electric motor bearings.
4. After tensioning, tighten the 4 screws (ref.B, fig.8).
5. Refit the belt guard (ref.A, fig.8) using the respective screws.
14.4
Changing the drive belt
- The belt must be made of insulating material to ensure that
double electrical insulation of the cement mixer is maintained.
Only use original IMER spare belts.
1. Switch off the electric motor and disconnect the power plug.
2. Remove the belt guard (ref.A, fig.8) slackening its fastening screws.
3. Loosen the 4 screws (ref.B, fig.4) locking the support of the electric
motor and loosen the belt (ref.C, fig.4) by means of the screw (ref.D,
fig.4) to make it come out of the pulleys of the electric motor and re-
duction unit.
4. Insert the new belt, first into the pulley of the reduction unit and then
into that of the electric motor; make sure the six crests of the belt are
properly inserted in the races of the pulleys.
5. Pull the belt by means of the screw (ref.D, fig.4): if the belt tension is
correct, applying a force of approx. F=0.6 Kg at the centre of the free
part of the belt, the resulting camber should be approx. f=5 mm (fig.9).
6. After tensioning, tighten the 4 screws (ref.B, fig.8)
7. Refit the belt guard (ref.A, fig.8) using the respective screws.
14.5
Wheel replacement
Having to replace one or both wheels, it is recommended to use a fork-
lift truck:
1. Raise the machine by a few centimetres, engaging the forks in the
special seats (ref.B; Fig.3).
2. Pull out the split pin (pos.28, pag.24) and remove the wheel (ref.29,
pag.24).
3. Insert the new wheel and refit the split pin.
4. Lower the machine to the ground.
If you do not have a fork-lift truck, proceed as follows:
1. Raise the machine a few centimetres from the ground, resting the
wheel axle on a sturdy and stable support (e.g. piece of wood or other
homogeneous material). The height of this piece should be slightly hi-
gher than the wheel radius.
2. Pull out the split pin (pos.28, pag.24) and remove the wheel (ref.29,
pag.24).
3. Insert the new wheel and refit the split pin.
4. Lower the machine to the ground.
14.6
Removing and reitting the drum
If it is necessary to remove the drum, when refitting it is necessary to:
1. carefully clean the cone of the shaft of the reduction unit and the cone
of the bush of the drum.
2. Install the drum on the reduction unit, centring the bushing with the
reduction unit taper shaft.
- The slot formed in the bowl bushing must it onto the pin on
the reduction gear shaft.
3. Tighten with the special screw, using the torque settings given in table
4.
Table 4
Model
Tightening torque
Syntesi 190 EL
Syntesi 250 EL
22 ± 2 Kgm
Syntesi 300 EL
Syntesi 350 EL
30 ± 2 Kgm
14.7
Drum tilting brake
The rotation shaft of the tipping handwheel (ref.A, fig.6) is fitted with two
brakes (ref.B, fig.6), to prevent it turning independently when the mixing
drum is emptied.
If this occurs, it is necessary to replace these brakes with other IMER
spares.
14.8
Repairs
Repairs to electrical systems must be carried out exclusively by spe-
cialist staff.
Original IMER spare parts only must be used and must not be modified
in any way.
- Do not start up the mixer while repairs are being carried out.
- If the protection guards are removed during repair operations,
they must be correctly replaced when repairs are completed.
