Steering Pumps

for Passenger Cars and Commercial Vehicles

2 Powerful.

Powerful.

Contents Page

Design and Function of ZF Vane Pumps . . . . . . . 4

ZF Vane Pump CP 14 . . . . . . . . . . . . . . . . . . . . . . . 6

ZF Vane Pump CP 1 . . . . . . . . . . . . . . . . . . . . . . . . 7

ZF Vane Pump FP 2 . . . . . . . . . . . . . . . . . . . . . . . . 8

ZF Vane Pump FP 4 . . . . . . . . . . . . . . . . . . . . . . . . 9

ZF Vane Pump FP 6 . . . . . . . . . . . . . . . . . . . . . . .10

Energy Saving by ZF Vane Pumps . . . . . . . . . . . 11

Variable Displacement Pump VARIOSERV

. . . . 13

ZF Vane Pump FN 4 . . . . . . . . . . . . . . . . . . . . . . . 15

ZF Vane Pumps FN 31/ FN 32 . . . . . . . . . . . . . . . 16

ZF Radial Piston Pump RN . . . . . . . . . . . . . . . . . 17

ZF Tandem Pumps . . . . . . . . . . . . . . . . . . . . . . . .18

Technical Summary . . . . . . . . . . . . . . . . . . . . 19/20

Steering Pumps for Passenger Cars and

Commercial Vehicles . . . . . . . . . . . . . . . . . . . . . . 21

The power plant called steering

pump and what's behind it.

With its continuously ongoing

development, modern automo-

bile and commercial vehicle

manufacturing makes highest

demands on the overall concept

and on systems and single

components of the vehicle.

ZF Lenksysteme GmbH, a joint

venture of Robert Bosch GmbH

and ZF Friedrichshafen AG,

equips vehicles of renowned

manufacturers with both high-

quality single components and

complete steering systems. Early

cooperation by simultaneous

engineering offers the advan-

tage that our single components

or systems can be matched to

new vehicle concepts in a way

that saves time and costs.

Among the important single

components have been for

decades the steering pumps from

ZF Lenksysteme, which are

necessary for operating hydraulic

power steering systems, because

they decisively influence capa-

bility, energy consumption and

noise level of the steering system.

Their design features are the

achievement of maximum flow

rate and high efficiency with a

compact design and low weight.

Installation schematic of an engine-driven

ZF vane pump with ZF Servotronic 2,

electronic control unit, steering column,

oil reservoir as well as pressure, suction

and return lines.

Development trends

Reduction of

fuel/CO

2

emission

noise

weight

size

cost

Increase in

safety

comfort

performance

Improvement of

ruggedness

recycling capability

Powerful. 3

A wide production program

comprises different pump

designs and model ranges. Apart

from the millions of proven vane

pumps, which are driven either

directly by a combustion engine

or by a compressor depending

on the kind of vehicle, tandem

pumps with two separate oil

flows for a very wide range of

applications are also used. Our

energy saving solutions are

gaining more and more impor-

tance. For both the energy saving

pump in the form of the con-

trolled constant displacement

pump (ECO) and the variable

displacement pump VARIOSERV

have convincing saving potential.

Owing to an extensive pump

production network, we are able

to supply our global customers

worldwide from local production

plants and to assist them on site

with technical competence.

And everywhere the innovative

products and modern manufac-

turing technologies contribute to

reduce the environmental load

by saving of material and

decrease in consumption.

VARIOSERV

is a registered trademark

of ZF Lenksysteme GmbH.

Installation schematic of a compressor-

driven ZF vane pump with ZF Servocom,

oil reservoir, height and tilt adjustable

steering column and ball-track relay

shaft.

4 Design and Function

Design

The construction principle of the

ZF vane pumps is based on a

pumping element which is

usually in a light-alloy housing

(1) and consists basically of a

shaft (2), the rotor (3), ten

vanes (4), a cam ring (5) and

the pressure plate (6).

Depending on the model

range, a second pressure

plate or control plate is

used. The axial end is

formed by a cover (9) which

is also made of light alloy.

The shaft is guided in the

housing by a ball bearing

or plain bearing system

depending on the type of

drive and connected free of

play with the rotor (3) seated

on it. The vanes (4) are located

in the ten radially arranged slots

of the rotor. The cam ring (5),

which is fixed in the housing or

cover against rotation, surrounds

the rotor together with the

lateral pressure/control plate or

cover, respectively. The two

crescent-shaped pump chambers

are situated between the

cylindrical circumferential

surface of the rotor and the

ellipsoidal bore in the cam ring.

The volume of the chambers

results from the largest possible

Design and Function

of ZF Vane Pumps

6 Pressure plate

7 Suction chamber

8 Pressure chamber

9 Cover

10 Pressure relief and flow limiting valve

1 Housing

2 Shaft

3 Rotor

4 Vane

5 Cam ring

Functional scheme of

ZF vane pump FP 4.

8 7 4 10

1 2 6 5 3 9

Design and Function 5

crescent segment between two

vanes and the width of the rotor

or vanes, respectively.

Due to the design, the oil flow

generated in the crescent-shaped

pressure chambers is directed to

the valves for pressure relief and

flow limitation (10) positioned

longitudinally or transverse to

the shaft, limited to the values

set and passed on to the

hydraulic power steering via a

hose connected to it.

The performance ranges of the

vane pump model ranges as well

as the different equipment

variants in respect of mounting,

type of drive, energy saving and

attachment of an oil reservoir

can be seen from the Technical

Summary on page 19/20.

Function

Rotation of the input shaft (2)

and, with it, the rotor (3) results

in the vanes (4) located in the

rotor being forced radially by

centrifugal force on to the track

of the fixed cam ring (5). This

movement is assisted by the

pressurized oil which flows from

the pressure chamber (8) via

connections to the internal faces

of the vanes. Between the ten

vanes, ten self-contained pump

cells are formed which draw oil

into the two crescent-shaped

pump chambers when the

volume is increasing and expel it

into the pressure chamber when

the volume is decreasing. Since

the shape of the cam ring means

that two suction zones and two

pressure zones always lie oppo-

site each other, each of the ten

pump cells delivers twice its own

volume with every rotation of

the input shaft. In addition,

owing to this double-action

arrangement of the suction and

pressure zones, the hydraulic

radial forces acting upon the

rotor cancel each other out.

Flow rate control

For individual matching with the

steering system, the control

characteristic of the ZF vane

pumps can optionally be set at a

flow rate which is constant,

falling or falling in steps. In the

pump design offering a constant

flow rate (see figure below;

variant A) an almost constant oil

flow is fed to the power steering

gear throughout the speed range

of the vehicle engine.

The ZF vane pump with falling

control characteristic (variant B)

is designed such that the

required flow rate is achieved

Figure at top:

ZF Vane pump FN 4.

Figure at bottom:

Basic diagram of control characteristics

with constant and falling flow rate as

well as flow rate falling in steps.

at a determined speed, e.g.

1000 rpm, and that from this

point the flow rate continuously

falls while the speed continues to

rise. The reduced flow rate

remains, however, sufficient to

allow for the maximum hydraulic

assistance to be built up at any

time. This characteristic is

influenced by a control system in

the pressure region specifically

developed by ZFLS, which results

in a reduction of hydraulic

assistance in the steering gear at

higher speeds and, thus, in a

distinct improvement of the

contact between the steering

wheel and the road surface.

For special applications, it is

alternatively possible to provide

the pumps with a control charac-

teristic falling in steps (variant C).

In this design, the flow rate is

reduced in a pronounced transi-

tion area already in the medium

speed range. This shorter phase

of transition from maximum to

minimum flow rate can be

adjusted individually by a special

valve system.

Pump speed

[rpm]

Flo

wrate

[d

m

3

/m

in

]

A CB

6 ZF Vane Pump CP 14

ZF Vane Pump CP 14

Design

On this pump type, the pressure

relief and flow limiting valve is

installed transverse to the input

shaft. The mounting is standard-

ized and meets the specifi-

cations of the Association of the

German Motor Industry (VDA).

This allows easy exchange of

competitors' products.

As a rule, the ZF vane pump CP 14

on passenger cars is driven from

the vehicle engine via a pulley.

Flow rate control

For individual matching with the

steering system, the control

characteristic of this vane pump

can optionally be set at a flow

rate which is constant, falling or

falling in steps (see description

on page 5).

Energy saving

Remarkable energy saving

improvements can be achieved in

this model range by using the

ECO (Electronically Controlled

Orifice) valve described on pages

11/12.

ZF Vane pump CP 14 with pressed-in

suction connector.

ZF Vane Pump CP 1 7

ZF Vane Pump CP 1

Figure at bottom:

ZF Vane pump CP 1 with a multi-functional

bracket connected with the cover.

Figure at top:

ZF Vane pump CP 1 with pressed-in

suction connector.

Design

The CP 1 model range with its

modular design system allows

mounting in many ways, thus

ensuring optimum adaptation of

the pump to the vehicle con-

ditions. In addition to the specific

CP 1 mounting longitudinally to

the input shaft, it is also possible

to make use of transverse bolt

connection directly to the

combustion engine. Also, it is

possible to redesign the pump

cover to allow individual variants

of mounting, e.g. as a multi-

functional bracket, besides the

standard design.

Again, this pump is usually driven

by belt from the vehicle engine.

Flow rate control

For individual matching with the

steering system, the control

characteristic of the vane pump

CP 1 can optionally be set at a

flow rate which is constant,

falling or falling in steps (see

description on page 5).

8 ZF Vane Pump FP 2

ZF Vane Pump FP 2

ZF Vane pump FP 2 with pressed-in

suction connector.

Design

The pump type FP 2 was de-

signed specifically for the pres-

sure oil supply of hydraulic

power steering gears on small

passenger cars of the Asian mar-

ket. Both the compact design

with the pressure port moved

towards to the center and the

reduction of hydraulic capacity

and belt pull are adapted to

match on a high degree the

requirements of these subcom-

pact cars. An optionally fitted

pressure switch, tuned to the

electronics of the engine

management, prevents stopping

the vehicle engine at low speed.

The ZF vane pump FP 2 is pro-

vided with the standardized

mounting according to the speci-

fications of the Association of the

German Motor Industry (VDA).

Depending on the application,

other possibilities of attachment

are feasible. The pump is belt

driven from the vehicle engine.

Flow rate control

For individual matching with the

steering system, the control

characteristic of this vane pump

can optionally be set at a flow

rate which is constant, falling or

falling in steps (see description

on page 5).

ZF Vane Pump FP 4 9

Design

As a result of the standardized

mounting which meets the

specifications of the Association of

the German Motor Industry

(VDA), this proven pump type, of

which millions have been made,

ensures easy exchange of

competitors products. Also, it

allows to mount the oil reservoir

directly on top of the pump. This

saves a hose line and assembly

costs. Drive is preferably by belt

driven from the vehicle engine.

Flow rate control

For individual matching with the

steering system, the control

characteristic of the vane pump

FP 4 can optionally be set at a

flow rate which is constant,

falling or falling in steps (see

description on page 5).

Energy saving

Remarkable improvements for

energy saving can be achieved in

this model range too by adapting

the ECO (Electronically Con-

trolled Orifice) valve described

on pages 11/12.

ZF Vane Pump FP 4

ZF Vane pump FP 4 with pressed-in

suction connector.

10 ZF Vane Pump FP 6

ZF Vane pump FP 6 with oil reservoir

mounted on top.

ZF Vane Pump FP 6

Design

The development of the FP 6

model range achieves in partic-

ular the new target, set by the

automotive industry, of steering

pumps of higher hydraulic

capacity, for its performance

potential comprises a controlled

flow rate up to 15 dm

3

/min. and

a maximum pressure of 150 bar.

The function of the pumping

element and the external

dimensions of this pump are for

the most part identical to the

vane pump FP 4. Again, the

mounting is standardized and

meets the specifications of the

Association of the German Motor

Industry (VDA). This allows

easy exchange of competitors'

products. If required, a plastic oil

reservoir can be mounted in

order to save a hose line and thus

assembly costs.

Flow rate control

For individual matching with the

steering system, the control

characteristic of the vane pump

FP 6 can optionally be set at a

flow rate which is constant,

falling or falling in steps (see

description on page 5).

Energy saving

Remarkable improvements for

energy saving can be achieved in

this model range, too by using

the ECO (Electronically Con-

trolled Orifice) valve described

on pages 11/12.

Energy Saving 11

Energy Saving by

ZF Vane Pumps

7 Electronic control unit

8 Anti-vibration hose

9 CAN

10 Battery

11 Speed sensor

12 Steering wheel turning rate sensor

1 ZF vane pump

2 Steering gear (basic unit)

3 Steering valve

4 ECO valve

5 Oil cooler (if required)

6 Oil reservoir

Figure at top:

Schematic representation of a hydraulic

steering system with a ZF vane pump

with ECO valve.

Energy saving by ECO

Another important step towards

energy saving is the adaption of

an ECO valve (4) (ECO =

Electronically Controlled Orifice)

on the vane pump (1). Due to

control dependent on steering

wheel turning rate and vehicle

speed, this hydraulic control unit

generates a flow rate as needed

for the hydraulic steering system,

thus extending significantly the

functionality of the base pump.

The oil flow not needed by the

pump system is controlled chiefly

during straight ahead driving.

Advantages:

Fuel reduction by

20 to 40% on average

15 to 20 C decrease

in temperature

approx. 35% less power input

reduction of neutral pressure

drop by about 4 to 6 bar

(Values depend on duty cycles

and system design)

The necessary electronic control

can be integrated into the

existing vehicle electronics.

Figure at bottom:

Pump comparison for average power

input in the driving and ECE cycles

(test method for measuring pollutant

emissions).

6

12

3

1

10

5

7

9

2

11

84

800

700

600

500

400

300

200

100

Standard vane pump

Vane pump with ECO

Po

wer

in

pu

t[W

]

EC

Ecycle

Drivin

gcycle

Servotronic

is a registered trademark of

ZF Lenksysteme GmbH.

12 Energy Saving

6 Oil reservoir with fine filter

7 Electronic control unit

8 Hoses, anti-vibration hose

9 Cables to power supply, CAN,

ignition, vehicle sensors

1 ZF Vane pump FP 6 with ECO

2 ZF Servotronic 2 (basic unit)

3 Servotronic 2 rotary valve

4 Electric motor

5 Superposition gear system

Schematic representation of a ZF steering

pump with ECO together with a ZF Active

Steering on the basis of a ZF Servotronic 2.

3

5

4

2

6

7

8

9

1

Variable Displacement Pump VARIOSERV 13

Variable Displacement Pump

VARIOSERV

lable theoretical displacement.

The cam ring is varied as a function

of speed against the prevailing

differential pressure between the

left-hand (12) and right-hand

Left-hand figure:

Pump comparison for average power

input in the driving and ECE cycles

(test method for measuring pollutant

emissions).

Right-hand figure:

Variable displacement pump VARIOSERV.

chamber (13). A control valve (11)

with integrated pressure relief,

which is fitted transverse to the

shaft (2), decisively determines

the functional performance.

The development goal for this

pump type consists in assisting

the automotive industry in

achieving the target it has set,

i.e. achievement of the CO

2

and fuel consumption limits,

particularly on upper mid-size

and luxury cars. Further improve-

ment is possible by reducing the

steering oil temperature and

protecting the pump against

possible overload.

Design

Unlike the double-stroke rotor

set of the standard ZF vane

pumps, the cam ring (5, see fig.

on page 14) of the single-stroke

rotor set of the VARIOSERV is

variable and can generate, due

to varying eccentricity, a control-

800

700

600

500

400

300

200

100

Standard vane pump

VARIOSERV

Po

wer

in

pu

t[W

]

EC

Ecycle

Drivin

gcycle

operation prevents

excessive generation of

pressurized oil and, due to

the reduced power input, this

results at higher pump speeds in

significantly lower energy con-

sumption. This makes it possible

to simplify cooling measures in

the steering system.

When the vehicle engine speed

decreases, the differential pres-

sure between the left-hand and

right-hand chamber again in-

creases eccentricity between the

rotor and cam ring. The result is

that the theoretical displacement

continuously in creases again.

pressure to open the control

valve, pressurize the cam ring

and reduce eccentricity with

respect to the rotor (3). The

result is that the pump chambers

which become smaller merely

produce a reduced theoretical

displacement. This limited pump

14 Variable Displacement Pump VARIOSERV

1 Housing

2 Shaft

3 Rotor

4 Vane

5 Cam ring

6 Pressure plate

7 Suction chamber

Functional scheme of the variable

displacement pump VARIOSERV.

8 Pressure chamber

9 Cover

10 Outer ring

11 Control valve with integrated

pressure relief

12 Left-hand chamber

13 Right-hand chamber

Function

After the pump speed at engine

idle has been reached, the pump

delivers a constant oil flow to the

hydraulic power steering gear. A

further increase in speed causes

the internally increasing pump

2 1 6 10 11

9 8 7 12 3 5 4 13

ZF Vane Pump FN 4 15

ZF Vane Pump FN 4

Design

The design of the vane pump

FN 4 has primarily been

conceived for connection to the

air compressor of commercial

vehicles by means of a cross-

slotted disk for torque trans-

mission free from radial load. If

radial drive loads occur, as for

instance due to a gear drive, it is

possible to fit the FN 4 with a

shaft running in ball bearings.

If relief of the type-specific

maximum pressure of the pump

(165 or 185 bar respectively) is

not carried out within the

steering gear as is recommended,

this can in particular instances

be done by means of a pressure

relief valve integrated in the

flow limiting valve. The function

as well as the use of light-alloy

components is as described on

pages 4/5.

Also, it is possible to mount the

oil reservoir directly on top of the

pump. This saves a hose line and

thus assembly costs at the vehicle

manufacturer.

Figure at top:

ZF Vane pump FN 4. Pressure relief and

flow limiting valve fitted longitudinally.

Figure at bottom:

ZF Vane pump FN 4 with oil reservoir

mounted on top of it.

16 ZF Vane Pumps FN 31/ FN 32

ZF Vane Pumps FN 31/ FN 32

ZF Vane pump FN 31

The basis for the modular-design

pump is the short-length light-

alloy cover. It includes a pumping

element which features two

pressure plates and is equal in its

principle of hydraulic operation

to the vane pump FN 4 described

above. The cover also incorpo-

rates the flow limiting valve

(if required, with integrated

pressure relief), arranged at right

angles to the drive shaft, and the

suction and pressure ports.

The pressure port is optionally

feasible on the right or left. The

symmetrical flange bolt pattern

of housing and cover allows

fitting in any one of 4x90

positions.

The variable use of this pump

is also based on the rugged

shaft bearing system in the light-

alloy housing. The pump is

perfectly suitable to safely

absorb the axial and radial drive

loads if a clutch disc, V-belt pulley

or gear is used. In a gear

drive, the drive-side antifriction

bearing can be lubricated by

engine oil.

ZF Vane pump FN 32

This pump, which is for the most

part identical with the FN 31

model range, is used for appli-

cations with high displacements

up to 32 cm

3

/rev.

ZF Vane pump FN 31.

With gear drive and transversely fitted

flow limiting valve.

ZF Radial Piston Pump RN 17

ZF Radial piston pump RN

The same direction of delivery of

the radial piston pump for both

clockwise and counterclockwise

direction of drive is the reason

for its principal application as a

wheel-driven emergency steering

pump on commercial vehicles.

Besides the high pressure level of

200 bar maximum, the suction

control is of particular impor-

tance. It ensures that the output

flow remains the same in spite of

varying pump speed and only

that amount of oil is sucked in

which is necessary for steering.

Thus, no flow limiting valve is

required.

Depending on the type, several

pistons, driven by an eccentric

shaft, perform a stroke in the

radially arranged cylinder bores.

Preloaded compression springs

provide for the return of the

pistons. In the process, the

pistons are immersed in the oil-

filled suction chamber and their

interior can be filled with oil

through transverse bores. The

subsequent discharge stroke

forces the oil into the pressure

line. Automatic outlet valves

prevent the pressure oil from

flowing back into the piston

chamber. Depending on type and

ZF Radial piston pump RN, with 8 cylinders

and suction-controlled flow rate.

ZF Radial Piston Pump RN

application, pressure relief is by a

valve either in the pump or at

some other suitable location of

the hydraulic system.

oil and the water

pump ensures

the transport of

cooling fluid for

engine cooling.

In the event of a

combination of vane

pumps FP 4 and CP 1,

the type FP 4 pump

generates the pres-

surized oil for the steering

gear, whereas the vane

pump CP 1 drives a hydraulic

fan system. An electromagnetic

solenoid control valve, which

is influenced by the vehicle

electronic system and is open in

the zero-current condition,

determines the flow rate of the

CP 1 and thus the intensity of the

hydraulic fan drive. Both pump

elements are connected by an

intermediate housing and a shaft

coupling.

Another variant is the combi-

nation of a vane pump FP 4 or

FP 6 with a radial piston pump.

In the same, the vane pump

supplies the steering system, and

the radial piston pump equipped

with several pistons provides for

supply to systems for roll steer

and/or brake power assistance.

ZF Tandem Pumps

18 ZF Tandem Pumps

Figure at top:

ZF Tandem pump TN 4.

Figure at bottom:

ZF Tandem pump TP with hydraulic fan

system.

The tandem pump manufac-

turing range of ZF Lenksysteme

GmbH is project-dependent and

intended to meet a very wide

range of different customer

requirements. While circuit I

always supplies the steering

system with pressurized oil,

circuit II can, due to differing

pump variants, be used for the

following:

for cooling water of

combustion engines

for supplying hydraulic

fan systems

for supplying systems

for roll steer

for brake power assistance

for presupply of fuel

The two pump systems are driven

by the same pump shaft and

generate two oil flows that are

independent of each other.

Examples of tandem pumps on

passenger cars

In the field of passenger car

equipment, a combination of a

vane pump CP 1 with a water

pump is used. In it, the vane

pump supplies the hydraulic

steering system with pressurized

Examples of tandem pumps on

commercial vehicles

Depending on the specified

requirements, these pump

combinations developed for

installation on commercial

vehicles consist of a vane pump

FN 4, FN 31 or FN 32 and a gear

pump. The vane pump is used for

pressure supply to the hydraulic

steering system while it is the

function of the gear pump to

ensure presupply of the fuel.

Drive can either be free from

radial load via air compressor or

via a pulley or gear.

Technical Summary 19

Technical Summary

Passenger cars and light commercial vehicles

Technical data of radial piston pumps are individual, please consult us when required.

Technical data of tandem pumps: for values of circuit I see above, values of circuit II are specific.

Model range

Optional

energy saving

system ECO

Design

Theoretical

displacement

(cm

3

/rev)

Max. speed

(rpm)

Controlled

flow rate

(l/min)

Max. pressure

(bar)

Course of control

characteristic

Type of mounting

Max. oil temperature

(C)

Belt pull (N)

(depending on line

of action)

Weight

(kg)

Possible drives

Additional

attachment parts

CP 14 CP 1 FP 2 FP 4 FP 6 VARIOSERV

X X X

vane cell

8500 9000

5.9 12

4 10

constant / falling / falling in steps

120 (135)

constant

112

VDA

2000

1.28

belt pull / chain pull / direct

bracket / heat shield / pulley

oil reservoir

1500 / 2000

1.05

1500

1.3

belt pull

bracket / pul-

ley / pressure

switch

2000

1.35

belt pull / chain pull / direct

bracket / heat shield / pulley / oil reservoir

2000 / 3000

1.58 2.2

CP 1 or

transverse

installation

VDA / specific,

to be agreed

upon

VDA or

transverse

installation

specific,

to be agreed

upon

120 106 120 (130) 135 (150) 135

4 10 (12) 4 10 12 max. 15 max. 12

7 8.5 11 157 12.6 9.6 / 13

controlled

Technical Summary 20

1)

Under development.

2)

Only applies to ball-bearing-mounted version.

Technical data of radial piston pumps are individual, please consult us when required.

Technical data of tandem pumps: for values of circuit I see above, values of circuit II are specific.

Technical Summary

Commercial vehicles

Model range

Optional

energy saving

system ECO

Design

Theoretical

displacement

(cm

3

/rev)

Max. speed

(rpm)

Controlled

flow rate

(l/min)

Max. pressure

(bar)

Course of control

characteristic

Type of mounting

Max. oil temperature

(C)

Belt pull (N)

(depending on line

of action)

Weight

(kg)

Possible drives

Additional

attachment parts

FN 4 FN 31 FN 32

(X)

vane cell

4000 / 5000 depending on size

14 28

7 25

constant

120

165 185

(200)

1)

2-bolt

flange /

SAE A

max. 1200

2)

2.3

direct

belt pull

gear

pulley

gear

oil reservoir

pulley

gear

3.2

3.6

direct / gear

gear

various 2-bolt flanges

185

16 25

14 25 28 32

Steering Pumps 21

Steering Pumps

for Passenger Cars and Commercial Vehicles

P

a

s

s

e

n

g

e

r

C

a

r

s

C

o

m

m

e

r

c

i

a

l

V

e

h

i

c

l

e

s

CP 14

CP 1

FP 4 FP 6

FN 4

FN 31

FN 32

TN 4

TN 31

TN 32

VARIOSERV

Radial Piston

Pump

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FP 4 - ECO

FP 6 - ECO

FP 2

[Steering the right way]

ZFLS

7612

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A Joint Venture of

Robert Bosch GmbH and

ZF Friedrichshafen AG

ZF Lenksysteme GmbH

Richard-Bullinger-Strasse 77

D-73527 Schwbisch Gmnd

Germany

Phone: +49 (0)71 71 / 31-0

Telefax: +49 (0)71 71 / 31-32 22

www.zf-lenksysteme.com

ZF Lenksysteme GmbH:

the systems partner

ZF Lenksysteme GmbH is one of

the largest independent manu-

facturers of power steering

systems for passenger cars and

commercial vehicles. Renowned

automotive manufacturers from

all over the world value us as a

creative and efficient systems

partner for the development of

new and innovative solutions.

As a joint venture of Robert

Bosch GmbH and ZF Friedrichs-

hafen AG, ZF Lenksysteme GmbH

offers its customers a unique

source of expertise when it

comes to integrating a wide

range of top technologies in

modules, system modules or

entire chassis systems.

The benefits for the manufac-

turer are clear to see: even

shorter development times and

optimized production processes

with quality standards which

just get better and better.

Tech

nical

mo

dificatio

ns

reserved

.