By using the Trygg tire chains you declare to have read and will observe the warnings and guidelines hereunder and you will not assert any claims against the manufacturer, importer or retailer in case of non-observance.
SAFETY
Towing/Tie-down/Lifting:
Tire chain is especially hardened for the application intended. This hardening makes the chain hard and brittle compared to lifting chains. Under high tension the chain can suddenly break with no pre warning and pieces of metal may fly. Life is endangered when tire chains are used for unintended purposes such as towing, tie-down and lifting!
Speed:
Tire chains are used during difficult driving conditions and tire chains may break. Thus, driving with tire chains requires special consideration. One must never drive faster than 50 km/h (30miles/h) The driver must always observe the potential risks and drive at a safe speed.
Installation:
Please read and follow the installation instruction carefully. If you don’t have installation instructions, please obtain them prior to installation.
Ensure tire chain is properly installed prior to any use.
Difficult driving conditions:
Always use tire chains when difficult driving conditions are expected and before getting in trouble. The chains are not made for spinning your way out of trouble, but to increase the tire grip and reduce operating risks.
Damages/defects:
A chain must never be used when one or more links are worn more than half the thickness of the cross section. Never operate with defective chains. Chain damages must be repaired immediately.
Knocking or torn chains:
In case of knocking or torn chains stop the vehicle immediately, increase tension of knocking chains, dismount or repair torn chains.
Rules and regulations:
Follow rules and regulations and read the vehicle manufacturer’s instructions for proper chain usage. Correct installation and sufficient number of chains are prerequisites for safe operation.
Road grip:
Asphalt:
Tire chains on bare asphalt will reduce the road grip. Do not use tire chains on bare asphalt!
Hard ice/Rocks:
It is always a special challenge to get a good grip on hard ice and rocks. Too much steel (chain) on the tire will make it even more difficult i.e. less is often better. Some heavy chains may actually reduce the grip. Show extreme caution!
”Soft” ice (melting wet ice) and packed snow:
Trygg tire chains will increase operational control considerably.
Snow and mud:
Trygg tire chains are perfect for increased operational control in snow and mud. Softer conditions need thicker chains.
CHAIN DAMAGES
Breakage:
Breakage caused by high speed:
Doubling your speed quadruples the stress on the chain. High speed, even in very short periods, may introduce invisible cracks in the chain surface. Such cracks will eventually develop into a full breakdown, even during normal careful operations. This may sometimes explain an “inexplicable” breakage.
Breakage due to the chain being too loose:
The stress on the chain is considerably reduced when the chain is properly tightened. A well tightened chain “rolls” easily.
Breakage as a result of particularly heavy operations:
The very hard tire chains can be crushed under heavy loads. Please make sure to order chains especially hardened for heavy construction work. Obviously heavier chains are stronger than lighter chains.
WEAR
The absolute wear expresses the amount of steel that is worn. The relative wear expresses the amount of steel worn relative to the chain thickness. On faster moving vehicles the absolute wear is higher on heavier chains. Thus, in these conditions the life span may be quite similar for light and heavy chains.
Weight.
The force with which the chain hits the road depends on the chain weight, the driving speed and the slack in the chain. The impact increases four times when the speed is doubled. A tight chain “rolls” easily where a loose chain will slam the cross chain almost vertically onto the road. Thus, the combination of high speed, heavy chain and a loose fit is almost certain to ruin the chain – the chain will wear fast and will probably break. A light chain snugly fit will do much better under such conditions.
Spinning:
Spinning creates excessive wear and tear, in particular on asphalt. Spinning will eventually break something, be that the chain or equipment.
Construction and snow removal.
Thicker chains are stronger and give better grip. Thicker chains have a longer life span if used correctly.
Tire wear:
Tire chains will cause tire wear. A chain that’s fixed to the tire will create grooves. The chain must always be allowed to move on the tire during operations.
Forestry:
Heavy chains on slow moving vehicles regularly show substantial wear in between the links. Tighter chains will wear faster in between the links. Looser chains wear less and will also clean themselves of snow, mud and ice. Even so, also on forestry machines, tight chain installation has become more popular.
Rotation speed/Different working conditions for different sets of wheels.
The front wheels on a tractor typically turn three times when the rear wheels turn twice. Due to this front wheel chains will wear faster. Chaining up on one set of wheels only will chew up the chains if the transmission between the two wheel sets is fixed.
Equipment and type of work will cause uneven wear and tear to different sets of wheels.
Understanding the above-mentioned issues will have a great impact on the chain’s life span.
Chain tightening and driving speed must be coordinated.
AUXILLIARIES:
Tightening tools:
Locks and boomers:
Smaller chains are equipped with fixed tightening devices. These are mainly boomers and in some cases also cams.
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Chain tightener:
On heavier chains we recommend using separate chain tighteners.
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Tightening rail:
We may also offer a plug in tightening rail, which may be installed when the chain is on the tire. (This rail is included with deliveries to low profile tires, 55 and lower). The installation requires no tools. The tightening rail prevents the chain from twisting off the tire and provides a snug fit.
Repairs:
A broken chain link must be repaired instantly. Operating with damaged chains will cause further damage to the chain and may lead to damages to vehicle, equipment and personnel.
S and Z –link:
A broken cross chain is quickly repaired with our especially hardened Z-link and a rubber-locking plug.
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Repair With S-link above.
Repair with Z-link below. Z-link S-link
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Overlapping links/shackles: For emergency and temporary repairs overlapping links and shackles may be used. |
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Pin-connector: If a straight link or a grouser should break, the pin-connector can be used to repair the chain. |
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Repair ring: If a ring is broken this may be fixed either with our repair ring or with a hammerlock. Available in 10 and 13mm. |
Rotational direction:
Due to chain geometry and rotational direction some particular parts of the chain may wear faster than others. The uneven wear may be evened out by changing the rotational direction of the chain.
Chain leftovers:
When the chain has been fitted to the tire excess chain should be removed. This will ensure the rotational balance and prevent flailing parts from hitting equipment or personnel.
WARRANTY AND LIABILITY
Warranty:
Trygg tire chains are guarantied against fabrication defects. This concerns defective material, welding or hardening. Excessive chain wear other than that caused by production faults, is not justified for warranty.
This warranty expires after a period of six months from date of purchase of the chains. The date of purchase has to be proven by means of a sales slip.
Liability:
Our liability is limited to replacement of defective chains. In general Nøsted Kjetting and its affiliated companies accept no liability for damages to vehicles, equipment, persons or for instance production losses.
Warranty claims:
Warranty claims are evaluated based on warranty reports or during inspections. Inspections may take place on site, based on photos or when the chain is returned.
Returns will not be accepted without written consent from an authorized Trygg Dealer.