Hardi NAVIGATOR DELTA, Instruction Book, Page: 49 / 120

4 - Sprayer setup
49
Counter weight
To improve stability on articulated models, extra weight can be added
by means of liquid-filled tyres. The standard tyre valve is an universal air-
water valve. The tyres can be filled with liquid to max. 75% of their total
volume.
Use a mixture of water and CaCl
2
to avoid frost damage as described
below:
200 g (7.1 oz) CaCl
2
per litre water gives protection to -15°C (30.6°F)
300 g (10.6 oz) CaCl
2
per litre water gives protection to -25°C (12.6°F)
435 g (15.4 oz) CaCl
2
per litre water gives protection to -35°C (-5.4°F)
TO FILL THE TYRES:
1. Jack up the wheel and rotate wheel till the valve is positioned at
“12 o’clock”.
2. Remove the valve body and fill liquid until it reaches the valve.
3. When surplus liquid is drained through the valve stem fit the valve
body again.
4. Adjust tyre pressure and lower the wheel. Please refer to “Tyre pressure” on page 109.
€
DANGER! It is very important that the CaCl
2
is added to the water and agitated until it is fully dissolved. Never pour
water on to CaCl
2
! If you get CaCl
2
in the eyes, flush instantly with cold water for at least 5 minutes and seek medical
advice afterwards.
±
WARNING! The tyres must be liquid filled to max. 75 % of total tyre volume. Fill only the qty. of liquid necessary to
obtain sufficient stability of the sprayer. Do not fill liquid and CaCl
2
mixture in tyres without tubes!
μ
ATTENTION! When filling the tyres the valve should be positioned at 12 o’clock and when adjusting the tyre pressure,
the valve should be positioned at 6 o’clock.
TO EMPTY THE TYRES:
1. Rotate wheel till the valve is positioned at “6 o’clock”.
2. Remove the valve body and let out the liquid. Retain liquid in an
appropriate container.
3. To empty the tyre completely the tyre is inflated and a thin drain
tube is lead to the bottom of the tyre. The air pressure will now
empty the remaining liquid.
4. Remove the drain tube, fit the valve and inflate the tyre to specified
pressure. See “Technical specifications” for the table “Tyre pressure”.
μ
ATTENTION! Disposal of CaCl
2
has to take place according to local legislation.