Iveco Stralis AT/AD. Manual — part 250
Overhaul the brakes.
Inefficient operation of the brakes
YES
NO
YES
NO
YES
11
EARLY WEAR
OF THE BRAKE LININGS
Inefficient operation of the Duplex control valve
Overhaul or replace the Duplex control valve.
Inefficient operation of the triple control servo control
valve
Overhaul or replace the triple control servo control
valve
(continued)
NO
YES
Inefficient operation of the relay valve
Overhaul or replace the relay valve.
Inefficient operation of the A.P.U.
Air system pipes leak or burst
12
YES
NO
YES
BRAKE SYSTEM
WARNING LIGHT ON
Close or replace the worn or damaged fittings. Replace
the burst or damaged pipes.
Overhaul or replace the A.P.U.
S
TRALIS
AT/AD
58
AIR SYSTEM - BRAKES
Base - January 2003
YES
NO
YES
YES
Wrong wiring of the electric circuit of the indicator light
Find the wrong connection and restore the wiring.
13
PARKING BRAKE INDICATOR
LIGHT ON WITH LEVER
IN DRIVING POSITION
Inefficient operation of the parking brake manual con-
trol valve (lever)
Overhaul or replace the lever.
Wrong wiring of the electric circuit of the indicator light
Find the wrong connection and restore the wiring.
(continued)
NO
YES
Inefficient operation of the A.P.U.
Overhaul or replace the A.P.U.
YES
14
YES
NO
NOISY BRAKES
Worn brake linings
Replace the brake linings.
Foreign bodies between the brake linings and discs
(disc brakes)
Remove the foreign bodies between the brake linings
and discs.
AIR SYSTEM - BRAKES
59
S
TRALIS
AT/AD
-
YES
NO
YES
NO
YES
Brake discs off centre (disc brakes)
Grind or replace the brake discs.
Inefficient shoe return springs (drum brakes)
Overhaul the rear brakes.
Excessive ovalization of the brake drums (drum brakes)
Turn or if necessary replace the drums.
S
TRALIS
AT/AD
60
AIR SYSTEM - BRAKES
Base - January 2003
AIR SYSTEM - BRAKES
61
S
TRALIS
AT/AD
TIGHTENING TORQUES
PART
TORQUE
Nm
(kgm)
Compressor
Nut fixing pulley
200
(20.4)
Combined brake cylinder (for disc brakes)
Nuts for bolts fixing cylinder to brake calliper
180 + 30
(18.3 + 0.3)
Manual brake release screw (type 14 — front disc brakes)
max 35
(max 3.6)
Manual brake release screw (type 20/27 — rear disc brakes)
max 70
(max 7.1)
Fixing fittings
40
± 5
(4
± 0.5)
Combined brake cylinder (for drum brakes)
Manual brake release screw
315
± 15
(32.1
± 1.5)
Ring nut fixing brake cylinder
30
± 1
(3
± 0.1)
Fixing fittings
40
± 5
(4
± 0.5)
Diaphragm brake cylinder (for disc brakes)
Nut for fixing cylinder to brake calliper
180 + 30
(18 + 3)
Fixing fittings
40
± 5
(4
± 0.5)
Diaphragm brake cylinder (for drum brakes)
Ring nut fixing brake cylinder
315
± 15
(32.1
± 1.5)
Nut fixing clamp retaining cylinder cover
8
± 1
(0.8
± 0.1)
Fixing fittings
- BENDIX cylinder
- KNORR-BREMSE cylinder
- WABCO cylinder
17.5
± 2.5
40
± 5
45
± 5
(1.7
± 0.2)
(4
± 0.5)
(4.5
± 0.5)
Front axle disc brakes 5876-57080/DI
Self-locking hex screw M20 x 1.5 fixing brake callipers
615.5
± 61.5
(62.7
± 6.2)
Nut fixing wheels
665.5
± 66.5
(67.8
± 6.7)
Self-locking hex screw to fix brake disc to wheel hub
281.5
± 13.5
(28.7
± 1.3)
Self-locking hex screw M16 x 1.5 to fix brake calliper mount to stub axle
313.5
± 15.5
(32
± 1.6)
Threaded plug for wheel hub cover
55
± 5
(5.5
± 0.5)
Ring nut fixing wheel bearings
515.5
± 24.5
(52.6
± 2.5)
Cylindrical head screw with hex socket to lock wheel bearing adjustment clamp
27.5
± 2.5
(2.8
± 0.2)
Cover for wheel hub
♦
130
± 10
(13
± 1)
Front axle disc brakes 55080/DI
Nut fixing wheel
600
+50
- 20
(61.2
)
+5
- 2
Hex screw to fix brake disc to wheel hub
281.5
± 13.5
(28.7
± 1.3)
Threaded plug for wheel hub cover
55
± 5
(5.5
± 0.5)
Nut fixing wheel bearings
515.5
± 24.5
(52.6
± 2.5)
Cover for wheel hub
♦
130
± 10
(13
± 1)
Screw fixing nut
27.5
(2.8)
Screw fixing mount
289.5
± 14.5
(29.5
± 1.5)
Screw fixing brake calliper
615
± 61
(62.7
± 6.2)
♦ Spread a bead of sealant solely on the mating surface of the hub cover, using the specific metering device. Protect the threaded
part. Use LOCTITE sealant type 574.
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