Technical information

Water pump
Where a water pump is fitted, it should
NEVER be allowed to run dry or the seal
may be damaged.
Mixer controls
The hydraulic control valve for operating
the hopper is located on the left hand side
of the mixer, looking from the hopper end.
To raise the hopper, move the control
lever upwards as far as it will go and hold
it there until the hopper is fully up.
The loaded hopper must not be dropped
onto the loadcell, as this will cause
damage to the weighing mechanism.
DO NOT hold control in the 'raise' position
with the hopper up for more than a few
seconds, or overheating and loss of
efficiency will result.
To lower the hopper, push the control
lever downwards. Releasing the lever will
check the descent of the hopper as
necessary.
Do not walk, stand or lean
under a raised hopper unless
it is securely chained.
Drum operation
The control lever must be positioned
midway between MIX and DISCHARGE
positions for engine starting.
The lever locks itself in the two extreme
positions, being moved fully upwards
towards the loading and discharge ends of
the mixer for MIX and DISCHARGE
respectively. These two positions are
clearly marked on the mixer.
Batch weigher
The weigher gauge is mounted over the
controls on the left-hand side of the
machine when facing hopper, and is
connected by hydraulic piping to the
loadcell mounted at the front/centre of the
mainframe.
IMPORTANT This hydraulic circuit is
primed and sealed on leaving the works
and on no account should it be tampered
with.
The gauge is callibrated as follows;
300R: 0- 680kg (0-1500lb)
400R: 0-1000kg (0-2200lb)
500R: 0-1200kg (0-2600lb)
This gives accurate indication of batch
weights.
The adjustable coloured pointers mounted
on the rim of the gauge can be set by the
operator, to the aggregate proportion
required.
A protective cover is provided for the
gauge box to prevent damage when not in
use.
It is important that the mixer is standing
firm and level and that there is at least
50mm (2") clearance between the ground
and the base of the hopper at all times.
If aggregate is allowed to build up around
the hopper and weigh gear links, an
inaccurate gauge reading will be obtained.
Normal operation
Set the pointers on the gauge to the
aggregate proportions you require.
With the engine running, lower the hopper
slowly onto the loadcell.
Hold the hopper control lever fully down
for a few seconds until the gauge needle
begins to move up to ZERO, then release.
The hopper is then ready to load.
If you cannot get a ZERO reading, adjust
the gauge as follows.
To 'ZERO' weighing gauge
With the engine running, proceed as
follows:
Lower the hopper slowly onto the loadcell.
Check that the hopper is clear of the
ground.
Taking care not to stand on any part of the
hopper or weigh gear links, adjust knurled
knob on side of gauge to set the pointer to
ZERO.
OPERATION 2.11