Iveco DAILY M.Y. 2012, Body Builder Instructions

Page: 95 / 252

CHASSIS MODIFICATIONS
2-69
D
AILY
Printed 603.95.241 Base — 02/2012
Application of a retarder brake
Application of a retarder brake
2.19 Application of a retarder
Fitting a supplementary retarder (only the electronically-operated electro-magnet type) requires work on the propeller shaft
and therefore must be authorised by IVECO.
Models 29L and 35S cannot adopt the device, whereas suitability must be checked for the others based on the product grid
(wheelbases, versions).
The retarder must be selected based on the following formula:
i
p
⋅
C
f
R’
⋅
PTT
≅
1
i
P
= axle ratio
Cf = maximum braking torque (Nm)
R’ = loaded radius of the used tyre (m)
PTT = total ground weight (kg)
Calculation example of the maximum braking torque
Considering a 50C15V/P vehicle with axle ratio of 3.15 and 195/75R16 tyres.
From the data
1. i
P
= 3.15
2. R’ = 0.317 m
3. PTT = 5200 kg
the following is obtained:
C
f
= (5200
⋅
0.317) / 3.15 = 520 Nm
A retarder brake with a maximum braking torque of 500 Nm may be applied.
The application must be taken care of directly by the supplier in strict compliance with Chapters 2.2, 2.8 and 5.4 of these Directives.
The delegated workshop is responsible for every phase (fastening the unit to the vehicle structure, cutting the propeller shaft,
connections, checking correct operation).
For the connection of the management control unit, a bridle must be used on the instrument panel, which can be obtained from
the IVECO spare parts service with reference no. 5801619664 (right-hand drive) and 5801619666 (left-hand drive).
For vehicles with an ESP system, see Paragraph 2.15.4. NOTE