Boston D701 User manual

User manual D701 MOT Class 4 roller brake tester.
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DOC: BOS0188
D701
ATL Class 7 Roller Brake Tester
USER MANUAL
Garage Equipment Association
Boston Garage Equipment, 199 New Road, Rainham, Essex, RM13 8SJ, United Kingdom
T: [phone] F: [phone] [e-mail] www.boston-ge.com

User manual D701 MOT Class 4 roller brake tester.
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DOC: BOS0188
Contents
1 Introduction 3
2 General product description D701 4
2.1 The infra-red remote control and digital display 5
2.1.1 Infra-red remote control 5
2.1.2 Optional digital display 6
2.1.3 Global Control Platform (GCP)
3Safety 7
3.1 Important safety rules 7
3.2 Safety devices 8
3.3Misuse 8
4MOT regulations 9
4.1 Brake efficiency 9
4.2 Brake imbalance 10
5Manual MOT testing procedure 11
5.1 Preparations before starting a brake test 11
5.2 Testing the front wheels 12
5.3 Testing the rear wheels 13
5.4 Vehicleweight 14
5.5 Calculation of brake efficiency 14
5.6 Recalling values 14
5.7 Printing test results (optional) 15
5.8 Testing procedure without remote control 15
6Testing 3-wheel vehicles 15
7Testing 4x4 vehicles 16
8Trouble shooting and Maintenance 17
9Warranty 18
Appendix A: Product specifications 18

User manual D701 MOT Class 4 roller brake tester.
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DOC: BOS0188
1 Introduction
This manual describes how to safely use the D701 roller brake tester (further to be called the RBT) for
statutory Vehicle Inspection testing for Class 3 and 4 vehicles (further to be called MOT class 3&4). The
manual is intended for users of this equipment. Another manual for installation, service and calibration is
available.
The RBT is designed for testing commercially available class 3 & 4 vehicles for road use (including 3-wheel
vehicles and 4-wheel driven vehicles). It is important to note that the testing of 4-wheel drive vehicles is not
permitted when using the ATL automated procedure. The maximum axle load during the test is 3000 kg. The
test speed is 2.9 km/h. The RBT can be operated by one person.
This manual describes how to carry out a brake test according to the Department of Transport compulsory
scheme. The manual provides the MOT braking measurement requirements and describes a complete test
procedure.
The motor and control gear of the RBT are not flameproof and it is the responsibility of the operator to make
sure that the proposed site and the aspects of the installation comply with the Petroleum Regulations and that
they satisfy the local Petroleum Officer’s requirements.

User manual D701 MOT Class 4 roller brake tester.
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2 General product description D701
The RBT is a well-known method to analyse and judge the efficiency of the braking system of a vehicle.
The D701 consists of a mechanical floor unit with built in vehicle weighing system, a connection / control
panel, an infra-red remote control and the Boston Global Control Platform (GCP) for automated control
when being used for ATL one man testing.
The connection / control panel can be fitted with an optional display matrix for the display of information
and data taken from the RBT. In this format it is possible to use the D701 as a stand alone braketester
without the need for the computer platform, however in this format it is not possible to carry out the
automated one man test.
The split bed mechanical unit contains a left and a right roller bed. Each bed contains an electrical motor, a set of
three measuring rollers, a brake force transducer and additional safety sensors and an eight point vehicle
weighing system fitted to the base.
The brake forces induce reaction forces on the electric motor. An electric transducer with strain gauges measures
these reaction forces. The roller diameter is sufficiently large to keep the tyre flexing to a minimum. The special
coating of the rollers is very wear resistant and provides good friction values in both wet and dry conditions. The
third smaller roller on each side between the wheel supporting rollers has two functions: The first is to detect if a
vehicle is present in the roller bed (a built in safety device to prevent the motor to start up without a vehicle in
place). For safety purposes, the motors will not start if the left and right small rollers are not pushed down
within one second after each other (except when 3-wheel mode is selected). The second function is to detect if
tyre slippage on the rollers does not exceed the maximum value.
Chassis LEFT c/w
-cover plate
-electric motor
-force transducer
Main switch
Emergency switch
Manual start/stop buttons
Infra-red
remote control
S
Measuring roller
Measuring roller
Slip detection roller
Chassis RIGHT c/w
-cover plate
-electric motor
-force transducer
520
715
BSS2000
Side-Slip Meter
The BSS2000 Side-Slip Meter is sold as a separate
device and can easily be added to the D401 / D701
roller braketesters
Control cabinet with digital display

User manual D701 MOT Class 4 roller brake tester.
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DOC: BOS0188
During the test, the computer measures the brake force values. The system will calculate the imbalance
between the left wheel brake force and the right wheel brake force of an axle, as well as the brake efficiency
of the service brake and the parking brake.
2.1 General control
The equipment can be switched on by means of the mains switch on the side of the control cabinet. The unit
can be operated through the infra-red remote control or by the keyboard on the GCP. The system however
can also be operated manually using the manual buttons located on the side of the control cabinet (see
chapter 5.8). The system can be switched off at any time by pressing the emergency stop button, also located
on the side of control cabinet. The functions of the remote control and the control cabinet are explained in
the two following paragraphs 2.1.1 and 2.1.2.
2.1.1 Infra-red remote control / PC control
The system can be manually controlled by means of an infra-red remote control or the keyboard on the GCP.
For safety purposes, it is not possible for both methods of control to be active at the same time. As the user
only requires the remote control for manual testing, the option to select which control to use can be found
from within the manual test procedure on the GCP. Selecting the type of control can be done in the
following way.
Note: The activation buttons shown on the screen perform exactly the same functions as the buttons on the
remote control.
If the control panel shown here is displayed
on the screen then keyboard control only is
selected and the infra-red remote control is
de-activated.
Select the desired type of control and click
ok. If Infra-red is selected, the PC control
b
uttons will not be shown.
To change the type of control press ‘F6’.