Iveco Daily. Manual — part 307
4
STEERING GEAR
D
AILY
Base - May 2004
POWER STEERING SPECIFICATIONS AND DATA
Steering gear
Steering gear
Hydraulic
Power steering
Pinion and rack type
Type
ZF*
TRW
Operating pressure X
100 bar
Maximum delivery volume
-
No. of steering wheel turns
3.8
Rack travel in both steering
Rack travel in both steering
180
1 5 mm
Rack travel in both steering
directions:
180
1.5 mm
directions:
Type
TEXAND F020
SHELL-ALVANIA LS00
Lube oil
pinion side
kg
-
0.060
pipe end side
kg
-
0.030
Power steering pump
blade type with pressure relief valve incorporated
Motor
8140
FIA
F1C
Type
ZF 7684 955124 ZF 7684 955138 ZF 7612 955117 ZF 7682 955133
Minimum RGM
RPM
500
460
500
750
Maximum RGM
RPM
3500
2980
8500
3500
Maximum pressure
bar
80 + 10
100 + 10
115 + 10
Minimum delivery
dm
3
/min
-
-
Adjusted delivery
dm
3
/min
7
8
9
± 0,75
9
± 0,8
Turning circle (theoretical value) [m]
Wheelbase [mm]
MODELS
29 L - 35 S
35 C
(1)
35 C
(2)
- 40 C - 45 C - 50 C
60 C - 65 C
Tyres
205 - 225/70 R 15
195/65 R 16
195/75 R 16
225/75 R 16
3000
10.37
10.34
11.04
-
3300
11.25
11.22
11.98
11.79
3450
11.69
11.66
12.46
12.25
3750
12.57
12.54
13.40
13.17
3950
13.15
13.12
14.03
13.78
4100
-
13.56
14.50 (3)
14.24
4350
-
-
15.29 (4)
15.01
4750
-
-
16.55 (4)
16.24
(1) Front suspension with trasverse leaf spring.
(2) Front suspension with torsion bar.
(3) Models 35C-40C only
(4) Models 45C-50C only
52376
STEERING GEAR
5
D
AILY
Base - May 2004
TIGHTENING TORQUES
DESCRIPTION
TORQUE
DESCRIPTION
Nm
kgm
1
Screw, steering box fastening nut
50
÷ 61
5
÷ 6.1
2
Nut, ball joint to steering arm
68
÷ 83
6.8
÷ 8.3
3
Nut, ball joint to track arm
70
÷ 100
7
÷ 10
SPECIFIC TOOLS
TOOL NO.
DESCRIPTION
99347074
Knuckle pivot extractor (4x2 vehicles)
Main hydraulic power steering operating faults:
1
-
Steering stiff when turning right and left;
2
-
Steering stiff only when turning left or right;
3
-
Steering stiff when the wheel is turned quickly;
4
-
When steering, heavy jolts are felt at the wheel;
5
-
Torsional vibration of the steering wheel;
1
YES
NO
YES
NO
YES
NO
YES
NO
YES
STEERING STIFF
WHEN TURNING
RIGHT AND LEFT
Insufficient oil in system.
Open tank and check oil level. With engine running, top
up oil to upper mark on dipstick and bleed system.
Air in hydraulic circuit.
Check suction tube and pump shaft seal for leaks. Bleed
system and top up the oil.
Pump regulating valve jammed or blocked.
Replace the power steering pump
Insufficient oil pump delivery.
Overhaul or replace pump.
Universal joint not serviceable.
Make joint free to slide by moving it to and from several
times so that it tilts under its own weight.
6 -
Excessive play at the steering wheel;
7 -
Loss of oil;
8 -
Insufficient pressure in the circuit;
9 -
The vehicle tends to move sidewards;
10 -
Hydraulic power steering pilot light always lighted.
NO
YES
Internal power steering failure
Replace the power steering unit
6
STEERING GEAR
D
AILY
Base - May 2004
DIAGNOSTICS
Check suction tube and pump shaft seal for leaks. Bleed
system and top up the oil.
2
YES
STEERING STIFF ONLY WHEN
TURNING LEFT OR RIGHT
Incorrect position of hydraulic centre (when wheel is
released, the steering returns to one end of travel by
itself): (ZF steering case only)..
Replace the power steering unit
YES
NO
YES
NO
YES
3
STEERING STIFF WHEN THE WHEEL
IS TURNED QUICKLY
Regulating valve in pump blocked.
Replace the power steering pump
Insufficient pump delivery (gears worn).
Replace the hydraulic pump
Air in steering system.
YES
Insufficient oil in system.
Top up oil and bleed system.
4
YES
NO
YES
WHEN STEERING, HEAVY JOLTS
ARE FELT AT THE WHEEL
Play in universal joint.
Fit a new seal.
Replace the power steering unit
Internal failure of hydraulic power steering.
(Continue)
NO
STEERING GEAR
7
D
AILY
Base - May 2004
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