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Liquid Ballasting

Occasionally the machine needs extra weight to increase tractive power but also to lower the centre of gravity for improved stability.
Primary, wheel or chassis mounted weights should be used, but on occasions when this is impossible, the tires can be liquid filled.

Liquid filling alters tire characteristics:
- Tires get more rigid and less flexible.
- Rolling resistance increases.
- Increased risk of damage to tires, rims and axles.
- Considerably increased forces during road operations.
Mixing of anti-freeze fluid
Liquid recommendations
Liquid precautions

Liquid volume

Maximum permitted filling volume is 75% of the total tire volume. For forestry machines, operating in heavy terrain, max. 50% filling volume.

Select usage

Select tire dimension

Select wanted temperature

Select anti-freeze solution

Amount of glycol (L):
Volume of water (L):
Total weight (kg):



In areas without any risk of freezing:
- Tubed tires: water only.
- Tubeless tires: water + anti corrosion fluid, usually ethylene glycol.

In areas with a risk of freezing:
- Tubed tyres: water + calcium-chloride (CaCl2) or ethylene glycol or methylated spirit.
- Tubeless tyres: water + ethylene glycol.

These solutions lower the freezing point and do not damage the tyre, while the calcium chloride also increases the ballasting.
- Use pumps with rust resistant pressure gauges.
- Ensure the operator uses protective glasses, overalls, boots and rubber gloves.
- Prepare the solution by pouring the calcium chloride into the water and stirring the mix to help it dissolve.

Never pour the water into the calcium chloride: it is dangerous. Always mix calcium chloride in to water.

- Clean all the metal parts of the vehicle carefully when the filling or drainage operations are complete, as they may have come into contact with the anti-freeze, which is corrosive.
- Check tire pressure frequently as the quantity of air remaining in the tire is low.


Last updated 2007-12-18 |  Print this page Print this page |  E-mail this page E-mail this page
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