AL-KO AKS 3004 Bedienungs- und Montageanleitung

QUALITY FOR LIFE

FIGURE 1 FIGURE 2 FIGURE 3 1

AL-KO AKS3004

STABILISER COUPLING

Service Information

Printed June 2010

AKS3004 Stabiliser Coupling

QUALITY FOR LIFE

FIGURE 1 FIGURE 2 FIGURE 3 2

1.Introduction

Read the operating instructions and act accordingly. Keep the operating instructions

for general use. Obey the safety information and the warnings on the device.

Important: This product is a safety component. Assembly should be carried out only

by a qualified repairer.

2.Safety Precautions Important operating information

The tow ball on the towing vehicle must be free of grease and other residue; otherwise

the stabilizing effect will be greatly reduced.

All AKS stabilizers must only be used with 50mm tow balls connected to the

towing vehicle with an anti rotation plate which does not allow the tow ball to

unscrew or rotate. Contact AL-KO for advice or supply.

If friction pads are contaminated with grease they should not be cleaned as this

will have a reduced stabilizing effect. Therefore friction pads should be

replaced.

The AKS 2004/AKS 3004 should only be operated by one person when opening

and closing.

Articulation:

Maximum articulation must not exceed ± 20° vertically. Maximum articulation must not

exceed ± 20° horizontally.

CAUTION:If these articulations angles are exceeded, components will be overloaded

and the operation of the assembly adversely affected!

AKS3004 Stabiliser Coupling

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FIGURE 1 FIGURE 2 FIGURE 3 3

Please check the conditions for the attachment by

following the steps listed below:

Clearances for stabilizing handle (locking handle)

The area above the tow ball of the vehicle must be free from

vehicle components or attachments (e.g. vehicle overhang,

spare wheel etc.) and allow full function of the stabilizing

handle.

3. Operating Instructions

Coupling handle (Figure 10 item1)

Stabilizing lever (Figure 10 item 2)

Preparation for coupling or uncoupling:

The stabilizing lever (Figure 11/2) must be in the uppermost

position (open) for coupling and uncoupling.

3.1 Coupling: Ball coupling

Open ball coupling. To do this, pull the coupling handle (Figure

12/1) up in the direction of the arrow. The coupling mechanism

has an open position; i.e. as long as the AKS 2004/AKS 3004

is not placed on the ball the coupling handle will remain open.

Put the opened coupling on the tow ball of the towing vehicle.

The coupling handle must now audibly click back into the

starting position.

In addition, press the hand lever (Figure 13/1) down by hand.

Closure and securing follow automatically.

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FIGURE 1 FIGURE 2 FIGURE 3 4

WARNING: Coupling ball is correctly engaged when the

green edge of the safety indicator button (Figure 13/3) is

visible.

3.2 Uncoupling

The uncoupling of the trailer from the towing vehicle takes

place in the reverse order: Pull the stabilizing handle right up to

stop (top end position of the stabilizing lever). Open coupling

handle and lift the AKS 2004/ AKS 3004 from the ball on the

towing vehicle. With bigger nose loads coupling and uncoupling

can be made easier by using a jockey wheel.

Please note:

The friction pads (Figure 14/1,2,3) are pressed against the

tow ball and generate a stabilizing/damping force. The friction

pads are therefore subject to wear. However, they are wear

resistant and have therefore a long service life.

3.3 How to check the efficiency of the stabilizing unit

(lateral friction pads)

Couple up AKS 2004/AKS 3004; to a standard 50 mm tow ball

Open stabilizing lever (figure 15/1)

Close stabilizing lever until resistance is felt (friction pads are in

contact with the tow ball but not yet under pressure)

If the arrow on the pressure plate (fig. 15/4) is before or on the

marked area (Fig. 15/2) the friction pads are still as new -A

The arrow on the pressure plate (15/4) should lie in the marked

area on the housing (figure 15/2 and 3) -B

If the arrow on the pressure plate reaches or passes the

replacement marking on the housing (figure 15/3) the friction

pads are worn out -C PLEASE NOTE: Adjustment of the friction pads is not

possible.

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FIGURE 1 FIGURE 2 FIGURE 3 5

4. Servicing and Cleaning

4.1 Replacing friction pads (lateral friction pads)

This should be done when the arrow on the pressure plate has

reached or passed the “replace” marking on the housing

(Figure 15/3).

Uncouple AKS 2004/AKS 3004.

Remove protective caps (Figure 16/1) with the aid of a

screwdriver. Press out the worn out friction pads (fig. 16/2)

inwards and remove (use punch and hammer).

Insert new friction pads from below with the pin in the sleeve

and press in as far as they will go. (Pin will engage no tools

necessary). Re-insert shim rings, if present.

4.2 How to check the wear of the brake lining of the

friction pads The brake lining of the AKS 2004/AKS 3004

friction pads are subject to a certain degree of mechanical

wear after high mileage. To show when the friction pads are

worn, a wear indica-tor is built into the handle (Figure 17/1).

Couple the AKS 2004/AKS 3004 onto the towing vehicle (do

not activate stabilizer unit). If a green indicator is visible (figure

18/2) then the AKS 2004/AKS 3004 is in a new condition or

the wear of the ball and the AKS 2004/AKS 3004 is within

permissible limits.

If only a red indicator is visible (Figure 19/3) then this can have

the following causes:

AKS 2004/AKS 3004 is not worn but the tow ball has reached

its lowest limit of wear ( 49 mm or smaller)

AKS 2004/AKS 3004 and the tow ball show signs of wear

Tow ball is in a new condition (50 mm) but the brake lining of

the AKS 2004/AKS 3004 friction pads (Figure 14/2 and 3)

show a high degree of wear.

Establish the diameter of the tow ball so that conclusions may be drawn as to

the wear of the brake lining of the AKS 2004/AKS 3004 friction pads (ball

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FIGURE 1 FIGURE 2 FIGURE 3 6

diameter must not be less than 49 mm) PLEASE NOTE: All maintenance work

should be carried out by specialist workshops authorized by AL-KO (Service

Centers) or in accordance with the AL-KO Operating Instructions.

Replacing the friction bearing bushing:

Always replace both friction bearing bushings!

AKS 2004 /3004 is uncoupled Remove lateral friction liners

as outlined in

4.1 Pull the rubber buffer (Figure 20/1) up and off.

Press the safety indicator outwards and secure with SW 14

hexagon spanner (Figure 20/2).

Remove cheese-head bolt (Figure 20/3).

Press brake lining recess (Figure 20/4) inwards and pull

down and out. Open ball coupling –pull coupling handling

(Figure 20/8) up (open position).

Remove countersunk head cap screw (Figure 20/5).

Press the friction pad (Figure 20/6) inwards with a

screwdriver and remove from the ball cup.

Please note: A torx spanner (T25/T30) is necessary for unscrewing items 3 and 5.

Fitting the friction pads takes place in the reverse order.

Tighten screws (Figure 20/3 and 5) with 5Nm.

Replace rubber buffer (figure 20/1) over the attachment profile on housing, first at the

bottom and then at the top.

Refit lateral friction liners again see 4.1

4.3 Important advice for maintenance and cleaning

The tow ball on the towing vehicle is to be cleaned of grease and other residue.

Suitable for cleaning:

Thinners / White spirit / Brake cleaner - otherwise the stabilizing effect will be

severely reduced. If friction pads are contaminated with grease they should not

be cleaned as this will have a reduced stabilizing effect. Therefore friction pads

should be replaced.

The surface of the tow ball must be free of grooves, rust and seizing marks. Otherwise

there will be increased wear!

QUALITY FOR LIFE

FIGURE 1 FIGURE 2 FIGURE 3 7

Coated tow ball

Tow ball coatings (e.g. Zinc plated, Chrome plated,

Dacromet, lacquered, KTL or any other coating) must be

removed with a 100-120 grade emery cloth, otherwise

noise, excess wear, decreased stabilizing efficiency or

damage of the AKS 2004/3004 parts may occur.

When using in extreme winter conditions, carefully spray the

visual indicator (coupling engaged) with defroster

4.4 Lubrication

Should lubrication of stabilizer unit parts become necessary

then the following must be observed:

Clean all parts thoroughly.

Areas may only be covered with a thin film of

grease. Type of lubricant: Multi-purpose grease.

Warning:

When lubricating no oil or grease should get on the friction area or on the ball

holding area!

5.Operation

5.1 Maneuvering:

For easier maneuvering (on campsites, etc.) pull the stabilizing lever right up.

The stabilizing lever may not be used as a maneuvering handle.

During opening and closing, the AKS 2004/AKS 3004 must only be operated by one

person.

Press stabilizing lever down or pull it up with one hand only.

Never work with your foot or an extension. The components will be overloaded and

damaged!

When opening or closing the stabilizing handle, do not leave your hand on the

coupling handle!

Non-compliance means there is a danger of overloading the component parts.

5.2 Noises when driving

As a rule the friction pads of the AKS 2004/AKS 3004 do not cause any noise!

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FIGURE 1 FIGURE 2 FIGURE 3 8

Any clicking, creaking, squeaking noises arising could come from the following

causes:

Foreign bodies or dirt between the friction pad and tow ball.

Dry operation of the tow bar/tow shaft in the body of the coupling device.

Tow ball with coating (e.g. Grease, Zinc plated, Chrome plated, Dacromet, lacquered,

KTL or any other coating).

Remedial action:

Clean the tow ball and clean the friction pads by lightly rubbing over the linings with

sandpaper (100 –120 grain).

Lubrication of the coupling body through the grease nipples.

Type of lubricant: multi-purpose grease.

Go to specialist workshop. Have the ball holding areas checked for damage and the

locking mechanism for function. If necessary, change tow ball.

5.3 Spare Parts

Spare parts are safety critical parts! For this

reason when fitting spare parts in our products

we recommend the use of original AL-KO

Genuine parts or those parts that we have

explicitly approved. The reliability, safety and

suitability of parts designed especially for our

products, has been determined using a special

test procedure. In spite of constantly

monitoring the market we are unable to assess

or vouch for other products.

Please bear in mind that repairs should only

be carried out by trained and qualified

workshops/personnel.

QUALITY FOR LIFE

FIGURE 1 FIGURE 2 FIGURE 3 9

To establish the correct spare parts the service

centers need the ETI number = spare part

identification number on the AKS 2004/AKS 3004,

which is located on the front of the red cover of the

coupling head ( Fig 20 item 1).

All AKS stabilizers must only be used with 50mm tow balls

connected to the towing vehicle with an anti rotation plate

which does not allow the tow ball to unscrew or rotate.

Failure to follow instructions may result in serious injury.

Contact AL-KO for advice or supply.

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