3144 Views Updated 29 September 2026

20442353 SP1 Compressor for Volvo NL12 D12A Engine

1300 050 006

Summary

This water-cooled twin cylinder compressor is designed for Volvo NL12 trucks equipped with D12A engines. Featuring a Ø88.00 mm cylinder bore and 50 mm stroke, it ensures consistent air pressure delivery for heavy commercial vehicle braking systems. Equivalent to OE Volvo 20442353SP1.

Product identifiers
EAN Code	8699031049809

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Compatible OEM Codes

KNORR-BREMSE
- LP4960 SP1
- K000237X00 SP1
- K000237V SP1
- K000237C57 SP1
- K000237000 SP1
- II30899ATV SP1
- II30899 SP1
VOLVO
- 85000065 SP1
- 8157550 SP1
- 81128514 SP1
- 8112851 SP1
- 20442353 SP1

Description

What does a twin cylinder compressor do?

This twin cylinder compressor serves as a critical component within the pneumatic braking system, providing the necessary compressed air for vehicle operation. It is engineered with heavy-duty grade materials to withstand the high-pressure environments typical of heavy commercial vehicle engines.

Vehicle and engine compatibility

This specific unit is compatible with Volvo NL12 models featuring the D12A engine. The design includes a through drive configuration and integrated ESS features to ensure precise air management. It is specifically engineered to match the requirements of the original equipment in these heavy-duty applications.

Installation and maintenance

Installation requires careful attention to the water cooling connections, specifically the M16x1,5 inlet and outlet ports. Technicians should verify that the M26x1,5 air outlet and M22x1,5 unloader port configurations align with existing lines to ensure a leak-free installation and optimal cooling performance.

Troubleshooting and selection

When performing maintenance, always check the water-cooled valve plate and ensure all ports are free of debris to maintain high volumetric efficiency.

OE cross-reference

1300 050 006 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 20442353SP1.

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

Other OEMs

KNORR-BREMSE

K000237ES SP1
LP4960 SP1
K000237X00 SP1
K000237V SP1
K000237C57 SP1
K000237000 SP1
II30899ATV SP1
II30899 SP1

VOLVO

85000065 SP1
8157550 SP1
81128514 SP1
8112851 SP1
20442353 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?

This is only possible if the vehicle manufacturer specifies a twin-cylinder variant for that engine. If the drive gear, mounting flange, port locations, and oil supply do not match exactly, the conversion should not be made.

What are the key technical specifications of this unit?

This unit features a Ø88.00 mm cylinder bore, a 50 mm stroke, and a 608cm³ swept volume. It utilizes water cooling with M16x1,5 ports and includes an ESS feature.

How do I ensure this compressor fits my truck?

Match the component against the removed unit's OE number. Confirm that the cylinder diameter, cooling type (water-cooled), and port sizes like M26x1,5 match your current system.

What should I check during installation?

Ensure all water inlet/outlet ports are correctly connected and that the through drive mechanism aligns perfectly with the engine's drive gear.

What are the OE reference numbers of this part?

1300 050 006 directly replaces Volvo OE number 20442353SP1.