303.02.0005.03 4-Circuit Protection Valve Kit for Knorr-Bremse
303.02.0005.03
Summary
This repair kit is designed for 4-circuit protection valves used in heavy commercial vehicle pneumatic brake systems. It is compatible with Volvo models including FH, FM, and VHD, as well as Renault Trucks Premium and Magnum. This kit ensures the restoration of pneumatic circuit integrity. Equivalent to OE Knorr-Bremse AE4603S2.
| EAN Code | 8683457003224 |
|---|
Ready to Order
Compatible OEM Codes
-
KNORR-BREMSE
- K019911 S2
- K019909N00 S2
- K019908 S2
- K019907N00 S2
- II39775F S2
- II39140FM1 S2
- II39140F S2
- II38801F S2
- II37462N52 S2
- II37462 S2
- II37460N00 S2
- II36150 S2
- II36011N00 S2
- II3601105T S2
- II36011004 S2
- II36011 S2
- II33856 S2
- AE 4648 S2
- AE 4646 S2
- AE 4645 S2
- AE 4644 S2
- AE 4643 S2
- AE 4642 S2
- AE 4641 S2
- AE 4619 S2
- AE 4616 S2
- AE 4615 S2
- AE 4613 S2
- AE 4612 S2
- AE 4611 S2
- AE 4610 S2
- AE 4609 S2
- AE 4604 S2
- AE 4603 S2
Description
What does a 4-circuit protection valve repair kit do?
A 4-Circuit Protection Valve Repair Kit restores the essential sealing and pressure regulation functions of the valve that manages air distribution across independent pneumatic circuits. In heavy commercial vehicle brake systems, this component is critical for ensuring that a leak in one circuit does not compromise the pressure in others, such as the front axle or park brake circuits.Vehicle and engine compatibility
This kit is designed for use in systems sourced from Knorr-Bremse and is compatible with Volvo trucks including models like the FH16, FM13, VNL, and VHD, as well as Renault Trucks Premium and Magnum. It also fits various Mack and Volvo engine configurations such as D13, D16, and D12. Additionally, it is fitted to MAN, DAF, and Iveco vehicles.Installation and maintenance guidance
To ensure correct fitment during maintenance, technicians should verify the valve housing markings to match the specific circuit priority and connection dimensions. Replacing worn seals and diaphragms with a high-strength component kit helps maintain the factory pressure balance and prevents air system contamination.Troubleshooting and selection
Regular inspection of the pneumatic system can prevent unexpected pressure drops. Consult your authorized distributor for selection guidance.OE cross-reference
303.02.0005.03 (4-Circuit Protection Valve Repair Kit) is the equivalent of the Knorr-Bremse OE numbers. This part directly replaces Knorr-Bremse OE numbers AE4603S2, AE4604S2, AE4609S2, AE4610S2, AE4611S2, AE4612S2, AE4613S2, AE4615S2, AE4616S2, AE4619S2, AE4641S2, AE4642S2, AE4643S2, AE4644S2, AE4645S2, AE4646S2, AE4648S2, II33856S2, II36011S2, II36011004S2, II3601105TS2, II36011N00S2, II36150S2, II37460N00S2, II37462S2, II37462N52S2, II38801FS2, II39140FS2, II39140FM1S2, II39775FS2, K019907N00S2, K019908S2, K019909N00S2, K019911S2.Other OEMs
KNORR-BREMSE
- AE4648S2
- AE4646S2
- AE4645S2
- AE4644S2
- AE4643S2
- AE4642S2
- AE4641S2
- AE4619S2
- AE4616S2
- AE4615S2
- AE4613S2
- AE4612S2
- AE4611S2
- AE4610S2
- AE4609S2
- AE4604S2
- AE4603S2
- K019911 S2
- K019909N00 S2
- K019908 S2
- K019907N00 S2
- II39775F S2
- II39140FM1 S2
- II39140F S2
- II38801F S2
- II37462N52 S2
- II37462 S2
- II37460N00 S2
- II36150 S2
- II36011N00 S2
- II3601105T S2
- II36011004 S2
- II36011 S2
- II33856 S2
- AE 4648 S2
- AE 4646 S2
- AE 4645 S2
- AE 4644 S2
- AE 4643 S2
- AE 4642 S2
- AE 4641 S2
- AE 4619 S2
- AE 4616 S2
- AE 4615 S2
- AE 4613 S2
- AE 4612 S2
- AE 4611 S2
- AE 4610 S2
- AE 4609 S2
- AE 4604 S2
- AE 4603 S2
Related Products
Used In
Compatible Vehicles
| Brand | Model | Model Type | Engine |
|---|---|---|---|
| DAF | |||
| IVECO | |||
| KNORR-BREMSE | |||
| MACK | Granite | MP7 | |
| MACK | Pinnacle | MP8 | |
| MAN | |||
| RENAULT TRUCKS | |||
| RENAULT TRUCKS | Kerax | DXi11 | |
| RENAULT TRUCKS | Magnum | DXi12 | |
| RENAULT TRUCKS | Magnum | DXi13 | |
| RENAULT TRUCKS | Premium | DXi11 | |
| RENAULT TRUCKS | Premium | DXi13 | |
| VOLVO | |||
| VOLVO | B11R | D11A | |
| VOLVO | B13R | D13B | |
| VOLVO | FH12 | D12C | |
| VOLVO | FH12 | D12D | |
| VOLVO | FH13 | D13A | |
| VOLVO | FH13 | D13B | |
| VOLVO | FH13 | D13C | |
| VOLVO | FH16 | D16C | |
| VOLVO | FH16 | D16E | |
| VOLVO | FH16 | D16G | |
| VOLVO | FM10 | D10A | |
| VOLVO | FM11 | D11A | |
| VOLVO | FM11 | D11B | |
| VOLVO | FM12 | D12C | |
| VOLVO | FM12 | D12D | |
| VOLVO | FM13 | D13A | |
| VOLVO | FM13 | D13B | |
| VOLVO | FM13 | D13C | |
| VOLVO | FMX | D11B | |
| VOLVO | FMX | D13C | |
| VOLVO | NH12 | D12C | |
| VOLVO | TAD1341-1345VE | D13 | |
| VOLVO | VHD | D12 | |
| VOLVO | VHD | D13 | |
| VOLVO | VNL | D12 | |
| VOLVO | VNL | D13 |
FAQ
What is the function of a 4-circuit protection valve?
It distributes air pressure into four independent circuits within the pneumatic brake system to ensure safety by preventing a single leak from draining all circuits.
Which vehicle brands are compatible with this kit?
This kit is compatible with Knorr-Bremse systems used on Volvo, Renault Trucks, Mack, MAN, DAF, and Iveco heavy commercial vehicles.
How do I ensure I am selecting the correct repair kit?
Technicians should check the part number on the original valve housing and verify compatibility with the vehicle chassis number before installation.
What are common symptoms of a faulty protection valve?
Symptoms may include air leaks in the pneumatic system or an inability to maintain consistent pressure across all braking circuits.
What are the OE reference numbers of this part?
303.02.0005.03 directly replaces Knorr-Bremse OE numbers AE4603S2, AE4604S2, AE4609S2, AE4610S2, AE4611S2, AE4612S2, AE4613S2, AE4615S2, AE4616S2, AE4619S2, AE4641S2, AE4642S2, AE4643S2, AE4644S2, AE4645S2, AE4646S2, AE4648S2, II33856S2, II36011S2, II36011004S2, II3601105TS2, II36011N00S2, II36150S2, II37460N00S2, II37462S2, II37462N52S2, II38801FS2, II39140FS2, II39140FM1S2, II39775FS2, K019907N00S2, K019908S2, K019909N00S2, K019911S2.