NHTSA ID Number: 10235383
Manufacturer Communication Number: No. 14-21
TSB/Document Date: 2023-05-03
Summary
Installation and conversion instructions for the wheel system
Installation and Conversion Instructions
911 (992)
14 / 21 ENU
4400
4
Measuring Wheel System
Wheel alignment system
Figure 1
Foreword:
This operating manual describes the functionality of the wheel alignment system and explains operation
of the system and its components step by step. Please read these operating instructions carefully before
starting the system and inform all operators of the steps described in this manual. The wheel alignment
system is designed to simplify and optimize vehicle alignment. However, some safety instructions
must be observed during use. Despite the precise manufacturing tolerances and quality features of the
system, it is important to mention that all measuring systems can only provide accurate results if, in
addition to correct operation, care is taken in the handling and storage of the components. It is expressly
stated that some components (camber gauge, toe laser, etc.) must be inspected regularly to ensure
that they are accurate. In most cases, these checks can be conducted by the operator. These checks
are described insofar as possible in this manual. This manual describes the wheel alignment system,
including all available options.
If you have questions or technical support enquiries, please contact Manthey-Racing GmbH
These instructions are not necessarily exhaustive.
WARNING
Risk of material damage if the tightening torque is too high.
•
Risk of damage to central lock nut.
•
Risk of damage to vehicle parts.
The specified torque of 100 Nm (74 ftlb) must not be exceeded. The central lock nuts must NOT be
installed using an impact bolter.
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Installation and Conversion Instructions
NOTICE
•
Before starting alignment, please check the following points:
Fuel tank is completely full
The driver's weight was determined and an equivalent replacement weight is placed on the driver seat, or
a weight of 75 kg/ 165 lbs is assumed
Model Year:
As of 2021
Content
•
•
•
•
•
1. Overview of components
2. Detailed information on the measuring wheel
3. Determination of the required measuring wheel setting during the initial measurement of the
vehicle
4. Flow chart for measuring (initial measurement)
5. Trouble shooting
1. Overview of components
Figure 2
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Installation and Conversion Instructions
911 (992)
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4400
4
1.1 Lid contents
Figure 3
The three-piece toe width ruler is stored in the lid of the transport case. The toe width ruler is part of the
basic system equipment.
To ensure easy and precise handling, the toe width ruler is made from rigid, light carbon fibre composite
material.
1.2 Upper compartment contents
Figure 4
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Installation and Conversion Instructions
The upper compartment Figure 4 is intended for optional components.
The weight bags (10 x 10 kg/ 22 lbs and 2 x 5 kg/ 11 lbs) can be stored safely here.
If the available electronic steering wheel scales with quick connector for racing vehicles is ordered with
Krontec QR-30 quick connector, the charger with a mini
-USB connection can be stored here.
Figure 5
Figure 5 -1- – Weight bag: 10 kg/ 22 lbs
Figure 5 -2- – Weight bag: 5 kg/ 11 lbs
Figure 5 -3- – Mini-USB charging cable for wheel scales (120V wall plug and adapter not included)
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Installation and Conversion Instructions
911 (992)
14 / 21 ENU
4400
4
1.3 Contents of drawer 1
Figure 6
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Installation and Conversion Instructions
Figure 7
Figure 7 -1- –
Figure 7 -2- –
Figure 7 -3- –
Figure 7 -4- –
Figure 7 -5- –
Rotary plate
Steel ruler, 300 mm
Central lock for wheel nuts
Various height gauges
Air pressure tester
NOTICE
•
The standard central lock nuts on Porsche vehicles (model series 991) are not compatible with the
measuring wheels. The central lock nuts shown here must be used for measuring.
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Installation and Conversion Instructions
Figure 8 -6- –
Figure 8 -7- –
Figure 8 -8- –
Figure 8 -9- –
911 (992)
14 / 21 ENU
4400
4
Figure 8
"Universal" steering wheel scales
Steel ruler: 150 mm
Camber gauge
Levelling laser with stand
1.4 Contents of drawer 2
Figure 9
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Installation and Conversion Instructions
Figure 10 -1- – Measuring table
Figure 10 -2- – Insert, FA/RA
Figure 10
1.5 Contents of drawer 3
Figure 11
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Installation and Conversion Instructions
911 (992)
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4400
4
Figure 12
Figure 12 -1- – Tablet with accessories
Figure 12 -2- – Measuring wheel
Figure 12 -3- – Pack of screws/washers
* The screws and adjusting shims supplied allow the measuring wheels to be adjusted according to the
respective requirements (RO compensation and height adjustment).
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2. Detailed information on the measuring wheel
2.1 The measuring table
Figure 13
Four measuring tables are supplied. Each measuring table is allocated to a fixed position on the vehicle
and identified accordingly.
The measuring tables perform two functions. On the one hand, once they have been aligned, the four
measuring tables operate as an absolutely level contact surface for the measuring wheels. A wheel-load
scale (load cell) for determining and transmitting the specific wheel load is integrated in each measuring
platform.
RR —> Rear Right
RL —> Rear Left
FR —> Front Right
FL —> Front Left
NOTICE
•
Incorrect assignment of measuring tables will necessarily result in incorrect wheel load values!
WARNING
Risk of material damage due to excessive load.
•
Risk of damage to the measuring table.
The maximum support load per measuring table must never be exceeded by 600 kg (1322 lbs). The
vehicle must be carefully and evenly set down on the measuring tables. Failure to observe this will result in
mechanical damage to the load cell.
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Installation and Conversion Instructions
911 (992)
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4400
4
Figure 14
Figure 14 -1- – Wheel load scale / This side must always face outwards towards the operator
Figure 14 -2- – On/off switch on the wheel load scale
Figure 14 -3- – The status LED indicates the state of the battery
Green LED charge state OK
Yellow LED, battery status CRITICAL
Red LED batteries empty - REPLACE
WARNING
Danger of material damage and injury
•
The vehicle may only be measured using the wheel measuring wheel system on a solid substrate with
sufficient load-bearing capacity. The measuring tables could topple over! Failure to take this point into
consideration may result in serious injury and damage!
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Installation and Conversion Instructions
Position the four measuring tables under the measuring
wheels. The ball rollers of the measuring wheels may only
come in contact with the measuring gauges in the hatched
area.
Figure 15 -4- – The ball rollers of the measuring
wheels may only come in contact with the
measuring gauges in the hatched area
Figure 15 -5- – The height and level of the measuring
table are adjusted using the three threaded pins.
Figure 15 -6- – If the height and alignment of the
measuring table are adjusted, the threaded pins
must be secured with the knurled nuts to prevent
them from being misaligned accidentally
Figure 15
Figure 16
Figure 16 -7- – The measuring tables
must be positioned under the
vehicle in such a way that the ball
rollers of the measuring wheels
are centered on the contact
surface.
WARNING
Risk of material damage due to incorrect load distribution.
•
Risk of damage to the measuring table.
If the measuring wheels are set down outside of the hatched area, the vehicle may roll off the measuring
table! Risk of personal injury and damage to property!
The height and level of the measuring table must not be adjusted under load (vehicle weight on table)!
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Installation and Conversion Instructions
911 (992)
14 / 21 ENU
4400
4
Figure 17
The three marked holes are used as a mounting for the
levelling sleeves during the alignment of the measuring
table.
Insert plates must be installed to limit the freedom of
movement of the vehicle to a minimum on the measuring
tables during measurement.
Figure 18
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Figure 19
– Insert plate for the front axle
Figure 20
Figure 20 -1- – Always place the
insert with circular cut-out on the
front-axle measuring table
Figure 20 -2- – Always place the
straight insert on the rear axle
measuring table
Before the vehicle is set down onto the measuring tables with the measuring wheels installed, the inserts
must be removed and inserted again after being set down.
NOTICE
•
The vehicle must not be measured without installing the inserts!
•
The inserts are subject to certain wear and tear and must be replaced if they become excessively worn.
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Installation and Conversion Instructions
911 (992)
14 / 21 ENU
4400
4
If the vehicle height or weight including wheel load distribution is to be measured on a vehicle with
installed wheels, this can be carried out using the optional turntables.
Figure 21
Figure 21 -1- – The floating road contact plate allows the chassis to move within the wheel contact
point
Figure 21 -2- – The turntables are designed so that the vehicle is held securely and cannot roll off
accidentally if the base plate is tilted upwards.
Figure 22
Once all four measuring tables have been aligned, the turntables are locked with the measuring table by
means of the three retaining pins in the holes for the levelling sleeves.
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911 (992)
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TSB/Document ID: No. 14-21
Replacement Service Bulletin Number:
MFR Communication Date: 2023-04-07
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: WHEELS
MFR Component System:
MFR Component Subsystem:
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