Towball Specifications. Towballs must meet Directive EC 94/20 (Din 47058) The diameter of the ball must be 50mm (+0/-39mm) There must be a minimum of 60mm depth from the centre of the towball to the base of the neck. This is for AL-KO stabilisers as apposed to coupling heads There must be enough clearance between the centre of the ball and the base of the neck to enable the stabiliser to perform a 25° axial rotation movement. GUIDE TO TOWBALLS To ensure safe travel and safe coupling using AL-KO stabilisers, the following guidelines must be adhered to: AL-KO KOBER Ltd, South Warwic kshire Business Park, Kineton Road, Southam, Warw ickshire, CV47 0AL www.al-ko.co.uk THINGS TO REMEMBER! Towballs should have any paint or protective coating removed, right back to the bare metal, before they are used. Failure to do this could result in contamination of the friction pads. This could result in a stabiliser’s damping effect being affected. Due to friction when in use, any bits of paint or coating remaining on the ball can form to tiny. Al most ball-bearing like, deposits that will score or pit the ball. Replacement towballs for this reason are not covered under AL-KO warranty No form of grease should be used on the ball with the AL-KO stabiliser. Drivers with diesel fuelled cars should ensure their towballs are cleaned regu- larly as diesel fumes can leave a slightly greasy deposit in them. Before each journey AL-KO recommends that you lightly rub the ball with some fine grade emery cloth (100-120grade), and also the friction pads. This will keep any rust deposits or c ontaminates to a minimum and will optimize your stabilisers’ performance. i . 6 0 m m EC Standards also specify that stabilisers should be able to perform a degree of articulation as follows: Horizontally = 60° to right and left Vertically = 10° up or down TOWBALLS There are many towballs on the market that are not suitable for use with AL-KO stabilisers as they do not have the necessary length of neck to allow the correct amount of axial rotation. AL-KO Ball- correct These balls should NOT be used with an AL-KO stabiliser. Use of this type of ball could result in the vehicles becoming in-hitched, your stabiliser being damaged and/or a very serious accident happening. 5 6 4 8 m m TOWBALL HEIGHT In all instances it is imperative that the correct towball height specification is met. Caravan: 415mm =/-35mm Car: 385mm +/-35mm These measurements are taken on a level surface and represent the distance from the ground to either the centre of the towball or the centre of the coupling head. This requirement is part of EC regulations and must be adhered to. SWAN NECK TOWBALLS Swan neck towballs are different i n that their necks are long and tapered and give plenty of clearance for the stabiliser. They come in di fferent shapes, sizes and styles. With swan necks the measurement to look for is the clearance from the centre of the towball to the nearest point of contact with the vehicle. This Bolt on ‘fixed’ Swan Neck Detachable Swan Neck Bolt on ‘fixed’ Swan Neck ↨ ↨ 6 0 m m ↨ ↨ 17mm
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8/6/2019 Alko Towball Guide Final Rev1
http://slidepdf.com/reader/full/alko-towball-guide-final-rev1 1/1
Towball Specifications.Towballs must meet Directive EC 94/20 (Din 47058)The diameter of the ball must be 50mm (+0/-39mm)
There must be a minimum of 60mm depth from the centre of the towball to the base of the neck. This is for AL-KO stabilisers as apposed to couplingheadsThere must be enough clearance between the centre of the ball and the base of the neck to enable the stabiliser to perform a 25° axial rotation movement.
GUIDE TO TOWBALLSTo ensure safe travel and safe coupling using AL-KO stabilisers, the followingguidelines must be adhered to:
AL-KO KOBER Ltd, South Warwickshire Business Park, Kineton Road, Southam, Warwickshire, CV47 0AL www.al-ko.co.uk
THINGS TO REMEMBER!Towballs should have any paint or protective coating removed, right back to the bare metal, before they are used. Failure to do this could result incontamination of the friction pads. This could result in a stabiliser’s damping effect being affected.
Due to friction when in use, any bits of paint or coating remaining on the ball can form to tiny. Almost ball-bearing like, deposits that will score or pit theball. Replacement towballs for this reason are not covered under AL-KO warranty
No form of grease should be used on the ball with the AL-KO stabiliser. Drivers with diesel fuelled cars should ensure their towballs are cleaned regu-larly as diesel fumes can leave a slightly greasy deposit in them.
Before each journey AL-KO recommends that you lightly rub the ball with some fine grade emery cloth (100-120grade), and also the friction pads. Thiswill keep any rust deposits or contaminates to a minimum and will optimize your stabilisers’ performance.
Mi n. 6 0 mm
EC Standards also specify that stabilisers should be able to perform a degree of articulation as follows:
Horizontally = 60° to right and left
Vertically = 10° up or down
TOWBALLSThere are many towballs on the market that are not suitable for use with AL-KO stabilisers as they do not have the necessary length of neck to allow thecorrect amount of axial rotation.
AL-KO Ball- correct
These balls should NOT be used with an AL-KO stabiliser. Use of this type of ball could result in the vehicles becoming in-hitched, your stabiliser being damaged and/or a very serious accident happening. 5
6 mm
4 8 mm
TOWBALL HEIGHT
In all instances it is imperative that the correct towball height specification is met.Caravan: 415mm =/-35mmCar: 385mm +/-35mmThese measurements are taken on a level surface and represent the distance from the ground to either the centre of the towball or the centre of thecoupling head. This requirement is part of EC regulations and must be adhered to.
SWAN NECK TOWBALLSSwan neck towballs are different in that their necks are long and tapered and give plenty of clearance for the stabiliser. They come in different shapes,sizes and styles.
With swan necks the measurement to look for is the clearance from the centre of the towball to the nearest point of contact with the vehicle. This
Bolt on ‘fixed’ Swan Neck Detachable Swan Neck Bolt on ‘fixed’ Swan Neck
↨ ↨ 6 0 mm ↨ ↨ 17mm
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