7473 Views Updated 28 September 2026

20429339 SP1 Volvo NL12 D12A Twin Cylinder Compressor

1300 050 002

Summary

This high-strength twin cylinder compressor is designed for Volvo NL12 trucks with D12A engines. It features a Ø88.00 cylinder bore, 50 mm stroke, and water-cooled design to ensure reliable performance in heavy commercial vehicle brake systems. Equivalent to OE Volvo 20429339SP1.

Product identifiers
EAN Code	8699031049687

Ready to Order

Get Information

Compatible OEM Codes

KNORR-BREMSE
- LP 4974 SP1
- LP 4930 SP1
- K000236X57 SP1
- K000236X00 SP1
- K000236C57 SP1
- K000236AT SP1
- K000236000 SP1
- K000236 SP1
- II37214AT SP1
- II37214 SP1
- II15698AT000 SP1
- II15698AT SP1
- II15698 SP1
VOLVO
- 8500006 SP1
- 8113264 SP1
- 8112584 SP1
- 3987602 SP1
- 20429339 SP1
- 1628593 SP1

Description

What does a twin cylinder compressor do?

This twin cylinder compressor serves as a critical component within the air brake system, providing the necessary pneumatic pressure for braking and auxiliary functions. Engineered with heavy-duty grade materials, it is built to withstand high-pressure cycles and rigorous thermal conditions during operation.

Compatibility with Volvo engines

This specific unit is designed for Volvo NL12 trucks equipped with D12A engines. It features a through-drive design and a water-cooled configuration to maintain optimal operating temperatures. The assembly includes a water-cooled valve plate to enhance thermal management efficiency.

Installation and technical specifications

For proper installation, technicians should verify the air inlet port (Ø29) and air outlet port (M26x1,5) specifications. This unit also includes an air unloader port (M22x1,5) and water ports (M16x1,5). Ensure all connections are secure to maintain system integrity.

Maintenance and selection guidance

Consult your authorized distributor to check the compatibility list.

OE cross-reference

1300 050 002 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20429339SP1.

Technical Specifications

Technical Specifications
Cylinder Bore	Ø88.00
Stroke	50 mm
Swept Volume	608cm³
Air Inlet Port	Ø29
Air Outlet Port	M26x1,5
Number of Cylinders	2
Through Drive	OK
Air Unloader Port	M22x1,5
Water (W) or Air (A) Cooled	W
Water Inlet Port	M16x1,5
Water Outlet Port	M16x1,5
With ESS Feature	OK
Water Cooled Valve Plate	OK
Weight	23 KG

Other OEMs

KNORR-BREMSE

LP4974 SP1
LP4930 SP1
K000236ES SP1
LP 4974 SP1
LP 4930 SP1
K000236X57 SP1
K000236X00 SP1
K000236C57 SP1
K000236AT SP1
K000236000 SP1
K000236 SP1
II37214AT SP1
II37214 SP1
II15698AT000 SP1
II15698AT SP1
II15698 SP1

VOLVO

8500006 SP1
8113264 SP1
8112584 SP1
3987602 SP1
20429339 SP1
1628593 SP1

Compatible Vehicles

Compatible Vehicles
Brand	Model	Engine
KNORR-BREMSE
VOLVO
VOLVO	B10B	D10A
VOLVO	B10M	D10A
VOLVO	B12	D12A
VOLVO	F10	TD102
VOLVO	F12	TD122
VOLVO	FH12	D12A
VOLVO	FL10	D10A
VOLVO	FL10	TD102
VOLVO	FL10	TD103
VOLVO	FL12	TD122
VOLVO	FL12	TD123
VOLVO	NH12	D12A
VOLVO	NL10	D10A
VOLVO	NL12	D12A

FAQ

Can I fit a twin-cylinder compressor in place of a single-cylinder one?

Only if the vehicle manufacturer specifies a twin-cylinder variant for that engine. You must match the drive gear, mounting flange, port locations, and oil supply exactly to avoid system failure.

What are the key technical dimensions of this unit?

This unit features a Ø88.00 cylinder bore, a 50 mm stroke, and a swept volume of 608cm³. It is designed for water cooling with M16x1,5 ports.

How do I ensure this compressor fits my truck?

It is recommended to check the cylinder diameter, cooling type, and flange hole pattern against the removed unit's OE number to ensure perfect compatibility.

What type of cooling does this compressor require?

This is a water-cooled (W) unit. It requires connection to the engine's cooling system via the M16x1,5 water inlet and outlet ports.

What are the OE reference numbers of this part?

1300 050 002 directly replaces Volvo OE number 20429339SP1.