21088 Views Updated 27 September 2026

973 001 010 0 Relay Valve for WABCO systems

303.01.0001

Summary

This relay valve is designed for heavy commercial vehicle brake systems, ensuring precise pneumatic control. It features M22x1,5 port sizes and supports a maximum operating pressure of 10 BAR. Designed for durability in demanding environments. Equivalent to OE WABCO 9730010100.

Product identifiers
EAN Code	8699031063577

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Compatible OEM Codes

IVECO
- 71005249
- 61578004
- 42020573
- 42015698
- 04625756
- 02444906
- 01278511
MAN
- 90.81011-4390
- 90.81011-4360
- 81.99164-3679
- 81.43609-6008
DAF
- 522545R
- 522545A
- 522545
- 1505145
STEYR
- 99014360047
- 89000360397
- 79000360311
RENAULT TRUCKS
- 5021170451
- 5001829194
- 5000012541
MERCEDES BENZ
- 003 429 52 44
- 001 429 30 44
- 000 429 65 44
LIEBHERR
- 502928014
- 502928001
- 5029280
VOLVO
- 384909
- 348909
KRONE
- 945379
- 500945379
WABCO
- 973 001 010 0
VAN HOOL
- 637200680
TEREX
- 04720840
SCHWARZMULLER
- 4641
SCHMITZ CARGOBULL
- 50318
SCANIA
- 1935623
OTOKAR
- AIF0008
O&K
- 0718485
NOOTEBOOM
- 307061
NEOPLAN
- 110242100
LOHR
- A05020301
KÖGEL
- 77390
KASSBOHRER
- 82834210000
IRISBUS
- 0300610700
GOLDHOFER
- 201248
FRUEHAUF
- A2131600
FAUN
- 99700718485
DOLL
- 8143317
DEUTZ
- 02077426
BENALU
- 605310600

Description

What does a relay valve do?

This relay valve functions as a critical component within the pneumatic brake system, managing air pressure distribution to ensure reliable braking performance. Built with high-strength components, it maintains consistent signal transmission across the braking circuit even under heavy-duty operating conditions.

Compatibility and fitment

This component is compatible with WABCO systems and is engineered to meet strict industrial standards. It serves as a high-quality alternative for fleet managers and workshop technicians looking for reliable pneumatic control in heavy commercial vehicle braking assemblies.

Installation and maintenance

The unit features standardized M22x1,5 ports (Port 1, Port 2, and Port 4) and is rated for a maximum operating pressure of 10 BAR. During installation, technicians should ensure all connections are secure and check that the pneumatic lines are free from contaminants to maintain optimal performance.

System maintenance guidance

Regular inspection of the air lines and valve ports is recommended to prevent pressure drops. When replacing old units, verifying the port specifications and pressure ratings ensures seamless integration into the existing brake system.

OE cross-reference

303.01.0001 (Relay Valve Relay Valves) is the equivalent of the WABCO OE number. This part directly replaces WABCO OE number 9730010100.

Technical Specifications

Technical Specifications
Port 1	M22x1,5
Port 2	M22x1,5
Port 4	M22x1,5
Pressure	MAX 10 BAR

Other OEMs

BENALU

605310600

DAF

522545R
522545A
522545
1505145

DEUTZ

02077426

DOLL

8143317

FAUN

99700718485

FRUEHAUF

A2131600

GOLDHOFER

201248

IRISBUS

0300610700

IVECO

71005249
61578004
42020573
42015698
04625756
02444906
01278511

KASSBOHRER

82834210000

KÖGEL

77390

KRONE

945379
500945379

LIEBHERR

502928014
502928001
5029280

LOHR

A05020301

MAN

90810114390
90810114360
90.81011.4390
90.81011.4360
81991643679
81436096008
81.99164.3679
81.43609.6008
90.81011-4390
90.81011-4360
81.99164-3679
81.43609-6008

MERCEDES BENZ

A0034295244
A0014293044
A0004296544
0034295244
003.429.5244
003.429.52.44
003 429 5244
0014293044
001.429.3044
001.429.30.44
001 429 3044
0004296544
000.429.6544
000.429.65.44
000 429 6544
003 429 52 44
001 429 30 44
000 429 65 44

NEOPLAN

110242100

NOOTEBOOM

307061

O&K

0718485

OTOKAR

AIF0008

RENAULT TRUCKS

5021170451
5001829194
5000012541

SCANIA

1935623

SCHMITZ CARGOBULL

50318

SCHWARZMULLER

4641

STEYR

99014360047
89000360397
79000360311

TEREX

04720840

VAN HOOL

637200680

VOLVO

384909
348909

WABCO

9730010100
973.001.010.0
973 001 010 0

Related Products

Repair Kits

Compatible Vehicles

Compatible Vehicles
Brand	Model	Engine
BENALU
DAF
DEUTZ
DOLL
FAUN
FRUEHAUF
GOLDHOFER
IRISBUS
IVECO
KASSBOHRER
KÖGEL
KRONE
LIEBHERR
LOHR
MAN
MERCEDES BENZ
NEOPLAN
NOOTEBOOM
O&K
OTOKAR
RENAULT TRUCKS
SCANIA
SCHMITZ CARGOBULL
SCHWARZMULLER
STEYR
TEREX
VAN HOOL
VOLVO
VOLVO	B10B	D10A
VOLVO	B10M	D10A
VOLVO	B10M	TD100
VOLVO	B12	D12A
VOLVO	B12	TD120
VOLVO	F10	TD100
VOLVO	F10	TD101
VOLVO	F10	TD102
VOLVO	F12	TD120
VOLVO	F12	TD121
VOLVO	F12	TD122
VOLVO	F7	TD70
VOLVO	F7	TD71
VOLVO	FL10	D10A
VOLVO	FL10	TD102
VOLVO	FL10	TD103
VOLVO	FL12	TD122
VOLVO	FL12	TD123
VOLVO	N10	TD100
VOLVO	N10	TD101
VOLVO	N12	TD120
VOLVO	N12	TD122
VOLVO	NL10	D10A
VOLVO	NL12	D12A
WABCO

FAQ

What is the function of this relay valve in a brake system?

The relay valve acts as a signal amplifier in pneumatic systems, allowing for faster and more consistent brake application by managing air pressure distribution.

What are the port specifications for this component?

This relay valve is equipped with M22x1,5 ports (Port 1, Port 2, and Port 4) to ensure standardized connection in heavy commercial vehicle braking circuits.

What is the maximum operating pressure?

The component is engineered to operate safely with a maximum pressure rating of 10 BAR within the pneumatic system.

Is this part compatible with WABCO systems?

Yes, this component is designed to be compatible with WABCO systems, providing a reliable solution for heavy-duty braking applications.

What are the OE reference numbers of this part?

303.01.0001 directly replaces WABCO OE number 9730010100.