Master Hak 1204031 User manual
Assembly instruction:
1. Dismantle the bumper of the vehicle and the metal reinforcement bar (the bar will
not be used again).
2. Put the bar of the towing hitch in place of the steel bar using bolts M10x100 (pos. )
as shown in the drawing. To install the bar in holes B (for A4 produced 11/2000-
11/2004) or C (for A4 produced 11/2004-3/2008) should be remove plastic hole
plugs.
3. For vehicles equipped in GPS, to install aerial GPS in openings D.
4. Fix the ball with the M12x70mm bolts (pos. 4) from the equipment.
. Tighten all the bolt and nuts according to the table below.
6. Assemble the electric installation according to the factory vehicle instruction.
7. Cut off the part of the bumper that obstructs the assembly.
8. Unscrew plastic fixing bumper from the metal reinforcement bar and screw to
beam of the towing hitch, using bolts M6 (pos. 6).
9. Assemble the bumper.
Remarks:
1. Isolating mass in the adhesion spot of the towing hitch shall be removed.
2. After the assembly refresh the paint coat of the towing hitch.
3. Once the towing hitch is assembled, it is necessary to gain an entry in the
registration book from the vehicle control station.
4. All the defects in the paint coat of the vehicle shall be corrosion protected.
. After 1000km all the screws and nuts shall be tightened.
6. The hook ball must be clean and maintained with a grease.
7. It is unacceptable to introduce any changes into the towing hitch construction.
Towing hitch equipment:
No. Teil name Pieces
1 Ball 1
2 Bar 1
3 Socket plate 1
4 Bolt M12x70 - 8.8 2
Bolt M10x100 - 8.8 4
6 Bolt M6x20 - 8.8 2
7 Washer 6,2 2
8 Enlarged washer 10, 6
9 Spring washer 12,2 2
10 Spring washer 10,2 4
11 Nut M12 2
12 Nut M10 2
13 Nut M6 2
14 Ball cover 1
The recommended momentum for screws and nuts [Nm]
Class of strength M6 M8 M10 M12 M14 M16
8.8 11 24 46 80 12 190
10.9 16 3 67 11 183 27
Guarantee
1. The Manufacturer gives a 24-month guarantee dated from the
purchase.
2. The guarantee covers the quality defects resulting from the
manufacturer's fault.
3. The product damaged due to wrong maintenance and usage, or due
to normal wear shall not be subject to guarantee claim.
4. The defected product can be exchanged either at the purchase place
or by the manufacturer directly.
. Only the filled in card entitles to the guarantee rights.
ar towing hitch for:
Manufacturer: Audi
Model: A4
Type: Sedan, Estate 2001-2008
Catalog no. 1204031
Registration number of the vehicle:
Date of towing hitch production:
Date of towing hitch purchase:
Date of claim:
MASTER HAK S.C.
Rogalin ul. Jesionowa 4
62-022 Świątniki
Tel. +48 61 813 83 2
Fax. +48 61 893 87 44
http://www.masterhak.com.pl
e-mail: [email protected]
Assembly and exploitation instruction for the towing hitch
Designed for:
Manufacturer: Audi
Technical Data:
Model: A4
Production 2001-2008 D-Force value: 10,4 kN
Type: Sedan, Estate Max. trailer weight: 2000 kg
Catalog no.: 1204031 Max. ball pressure: 80 kg
Class A50-X
Approval number
according to
Directive 94/20/WE:
e20*94/20*0955*00
General directions:
The authoritative information regarding the trailer towing are the data given by the vehicle
manufacturer, regarding the fact that the towing hitch parameters cannot be exceeded.
The towing hitch assembly spots given by the vehicle manufacturer are preserved.
The towing hitch is a product influencing the driving safety and must be assembled by a
specialized staff.
Isolating mass in the adhesion spot of the towing hitch shall be removed, and the drilled
holes shall be covered with an anti corrosive paint.
Formula for force D calculation:
Max .trailer w eight
[
k g
]
x Max .v ehicle w eight
[
k g
]
Max .trailer w eight
[
k g
]
Max .v ehicle w eight
[
k g
]
x9,81
1000
=
D
