Technical information

Repeat lowering the hopper three or four
times to check that you obtain a
consistent ZERO reading.
If checking or resetting weigh gear, refer
to the Service section of this manual.
Dragline feeder
The winch, mounted on the upper frame,
is hydraulically driven. The winch is
energised via a hydraulic solenoid valve,
by a push button switch mounted on the
shovel handle.
A car type dynamo, or alternator, driven
from the engine, supplies power to
energise the solenoid valve.
Operating the dragline feeder
Rig the mixer as described in "Installing
the mixer on site" and, with the engine
running, pull the shovel back over the
aggregate away from the mixer.
Pressing the push-switch on the shovel
handle will energise the winch and start to
drag the shovel towards the mixer.
To stop the loaded shovel when it has
reached the hopper, simply release the
push-switch and tip the contents of the
shovel into the hopper.
After rigging the electric control cable, a
trial run of the shovel may show that the
slack of the electric cable is not taken up
by the bottom free pulley as the shovel
moves into the mixer. To prevent this,
increase the size of the weight on the
bottom free pulley. If the pulley then
becomes too close to the ground, wind a
couple of turns of cable onto the stowage
arm on the shovel.
Hopper loading arrangements
It is advisable to use a portable feeding
apron, or to erect a barrier of boards, so
that materials may be conveniently tipped
into the hopper. This is particularly
important when using a mixer fitted with a
batch weigher, to avoid a build-up of
aggregate underneath the hopper.
Pre-start checks
Check the level of fuel in the tank and the
level of lubricating oil in the engine sump.
The covers on this machine provide ample
ventilation, so keep them closed.
With the hopper down, check the level of
the hydraulic oil in the header tank.
Check the water supply connection to the
water tank inlet.
Check that the drum control lever is set
midway between the MIX and
DISCHARGE positions.
Charging the drum
Set the drum control lever in MIX position
and the water tank pointer to the amount
of water required before attempting to put
the batch into the mixing drum.
Material should be loaded onto hopper in
the following order: gravel, cement and
sand.
Raise the hopper and at the same time
place the water control rod into the
DISCHARGE position so the materials all
enter the drum at the same time.
When the water has stopped flowing,
return the control lever to the OFF
position.
With all the materials in the drum, lower
hopper and load for next batch.
NEVER allow the machine to be
overloaded.
Discharging the drum
After allowing at least one and a half
minutes from the instant at which dry
materials first enter the drum to
commencement of discharge, the
contents of the drum may be discharged
by moving the drum control lever smoothly
from CHARGE to DISCHARGE position.
2.12 OPERATION