3142 Views Updated 27 September 2026

81128514 SP1 Volvo NL12 D12A Twin Cylinder Compressor

1300 050 006

Summary

This twin cylinder compressor is designed for Volvo NL12 vehicles with D12A engines. It features a Ø88.00 cylinder bore, a 50 mm stroke, and a swept volume of 608cm³. This water-cooled component ensures reliable air supply for heavy commercial vehicle pneumatic systems. Equivalent to OE Volvo 81128514SP1.

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 vital component within the pneumatic braking system of heavy commercial vehicles, providing the necessary air pressure for reliable braking and suspension functions. Engineered with high-strength components, it is designed to withstand rigorous duty cycles in demanding environments.

Vehicle and engine compatibility

This unit is specifically fitted to Volvo NL12 trucks equipped with D12A engines. It maintains high efficiency through its dual-cylinder configuration and optimized airflow design. The assembly features a water-cooled design to manage thermal loads during continuous operation.

Installation and maintenance guidance

For professional installation, technicians should verify the port dimensions, including the M26x1,5 air outlet and M22x1,5 unloader port. The through-drive configuration and water inlet/outlet ports (M16x1,5) must match the existing engine mounting requirements to ensure a secure fit and proper cooling circulation.

Selection and replacement advice

When replacing this unit, it is essential to confirm that the drive gear and cooling connections align with the original specifications to prevent system leaks or pressure drops.

OE cross-reference

1300 050 006 (Twin Cylinder Compressor) is the equivalent of the Volvo OE number. This part directly replaces Volvo OE number 81128514SP1.

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 use a twin cylinder compressor instead of a single cylinder one?

This is only possible if the vehicle manufacturer specifies a twin-cylinder variant for that specific engine. You must ensure the drive gear, mounting flange, port locations, and oil supply match exactly.

What are the key technical specifications of this compressor?

This model features a Ø88.00 cylinder bore, a 50 mm stroke, and a 608cm³ swept volume. It utilizes an M26x1,5 air outlet port and is water-cooled.

How do I ensure correct fitment for my Volvo engine?

It is best to match parts 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 setup.

What should I check during installation?

Technicians should verify the through-drive configuration and ensure all ports, including the M16x1,5 water ports and M22x1,5 unloader port, are correctly aligned and tightened.

What are the OE reference numbers of this part?

1300 050 006 directly replaces Volvo OE number 81128514SP1.