Technical information

During the loadcell filling operation, an
airlock usually occurs in the fluid chamber.
This will cause inaccurate weigh dial
readings if allowed to remain. To release
airlock place loadcell in hand and give a
series of light taps with the other hand.
Once again it is important to remove all air
from pipe (16).
Screw the vice up until fluid protrudes
from end of pipe.
Place the pipe end in an improvised cup
(17) filled with fluid, release pressure on
loadcell (20) and the fluid will be drawn up
the tube (16). Ensure that the tube is kept
upright until fitted to gauge, so that fluid
will not run out.
Refilling weigh gauge
Due to a vacuum, the gauge will invariably
hold its quota of oil, but in any case, lay
the gauge on its face and fix a right-angle
adaptor (22) to the oil inlet (23) and fill
with Brake and Clutch Fluid. Open the
bleed screw (24) situated on the middle
coil of the Bowden tube. The weight of the
fluid will expel any trace of air. Care
should be taken to avoid oil dripping onto
the back of the dial face. Ensure that the
bleed screw is correctly tightened.
Refitting weigh gauge
When the filling operation is complete,
check the calibration of the gauge. If this
is satisfactory, the gauge and loadcell may
be refitted to the machine and tested with
known weights. Provided the adjusting
screws in the gauge which control
calibration have not been moved, the
gauge should register correctly.
A zeroing knob (4) is provided on the side
of the gauge. This should be adjusted with
the hopper empty and down on the
loadcell. Check that there is a clearance
between the hopper and the ground
before zeroing.
3.12 SERVICING