Iveco NEW DAILY, Instructions Manual

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NEW DAILY
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CHASSIS INTERVENTIONS
CHASSIS INTERVENTIONS
2.19 INSTALLING A RETARDER
59
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Printed 603.95.789
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1 Ed. - Base 02/2014
2.19 INSTALLING A RETARDER
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The installation of a retarder brake is complex and requires the perfect integration with electric
and electronic vehicle systems: therefore approval by IVECO is always necessary.
Fitting an additional retarder (always and only an electro-magneitc type with electronic management) requires action on the pro-
peller shaft and inasmuch must be authorised by IVECO.
Models 33S and 35S cannot accept the device, while suitability for the others must be verified in relation to the product grid
(wheelbases, versions).
The retarder selection must be performed based on the following formula:
204640
Figure 37
i
p
= rear axle ratio
C
f
= Maximum braking torque [Nm]
R' = radius under load of the used tyre [m]
GVW = Gross Vehicle Weight [kg]
Example of calculation of max braking torque
We consider a vehicle DAILY 50C15V/P, with axle ratio 3.15 and tyres 195/75R16,.
From data:
1. 1. i
p
= 3.15
2. R’ = 0.317 m
3. GVW = 5.200 kg
we obtain:
C
f
= (5.200 • 0.317) / 3.15 = 520 Nm
Can be applied a retarder brake with maximum deceleration torque of 500 Nm.
The installation must be in charge of the brake manufacturer, through its authorized service centres, in accordance with Chapters
2.2 (
➠
Page 8), 2.8 (
➠
Page 26) and 5.4 of these Directives. He has the responsibility of the sizing of the coupling parts, the cor-
rect functioning and the proper execution of the work.
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For vehicles equipped with the ESP system, see Chapter 2.15 - Paragraph "Derating of the ESP
system".