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Iveco Daily. Manual - part 307

STEERING GEAR

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

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

0.060

pipe end side

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

/min

Adjusted delivery

/min

± 0,75

± 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

AILY

Base - May 2004

TIGHTENING TORQUES

DESCRIPTION

TORQUE

DESCRIPTION

kgm

Screw, steering box fastening nut

÷ 61

÷ 6.1

Nut, ball joint to steering arm

÷ 83

6.8

÷ 8.3

Nut, ball joint to track arm

÷ 100

÷ 10

SPECIFIC TOOLS

TOOL NO.

DESCRIPTION

99347074

Knuckle pivot extractor (4x2 vehicles)

Main hydraulic power steering operating faults:

Steering stiff when turning right and left;

Steering stiff only when turning left or right;

Steering stiff when the wheel is turned quickly;

When steering, heavy jolts are felt at the wheel;

Torsional vibration of the steering wheel;

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.

YES

Internal power steering failure

Replace the power steering unit

STEERING GEAR

AILY

Base - May 2004

DIAGNOSTICS

Check suction tube and pump shaft seal for leaks. Bleed
system and top up the oil.

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

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.

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)

STEERING GEAR

AILY

Base - May 2004

Content .. 305 306 307 308 ..