Product Overview
The 4123520250 is a genuine Detroit Diesel single-cylinder air brake compressor with a 352 cc displacement, specified for Mercedes-Benz Atego and Axor trucks and applications using OM904LA, OM924LA, OM926LA, and MBE 900-series engines. This water-cooled compressor uses a single piston operating within an 85 mm cylinder to generate compressed air for the vehicle's pneumatic braking system, with a 62 mm piston operating distance and a water-cooled valve plate.
Product Features
The 4123520250 single-cylinder air brake compressor is specified with a 352 cc displacement, water cooling, and a direct-working configuration for commercial vehicle pneumatic systems.
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Uses one cylinder with an 85 mm bore for air compression
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Provides 352 cc displacement through a single-piston compression mechanism
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Incorporates a 62 mm piston operating distance within the compressor assembly
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Uses water cooling and a water-cooled valve plate during operation
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Includes an ESS feature and direct-working configuration according to supplied specifications
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Designed for direct replacement in compatible air brake compressor installations
General Specifications
| Condition |
New |
| Part Number |
4123520250 |
| Brand |
Detroit Diesel |
| Part Type |
Single-Cylinder Air Brake Compressor |
| Vehicle Applications |
Mercedes-Benz Atego, Mercedes-Benz Axor, Freightliner Trucks |
| Engine Configuration |
OM904LA, OM924LA, OM926LA, MBE 900, MBE 906, MBE 926 |
| Number of Cylinders |
1 |
| Cylinder Diameter |
85 mm |
| Displacement |
352 cmΒ³ |
| Piston Operating Distance |
62 mm |
| Port 0 |
Γ30 mm |
| Port 2 |
M26x1.5 |
| Port 4 |
M12x1.5 |
| Port 8.1 |
Γ6 mm |
| Port 9.1 |
M14x1.5 |
| Port 9.2 |
M14x1.5 |
| Crankshaft Thread |
M20x1.5 LH |
| Cooling Type |
Water |
| ESS Feature |
Yes |
| Water-Cooled Valve Plate |
Yes |
| Direct Working |
Yes |
| Maximum Operating Pressure |
2.5 bar |
| Fitment Type |
Direct Replacement |
Installation Notes
The 4123520250 should be installed after checking the compressor mounting arrangement, drive connection, crankshaft thread direction, air line fittings, and cooling circuit connections against the existing assembly. Before returning the vehicle to service, inspect the connected air system for leaks, confirm coolant circulation, and check compressor operation and pressure regulation using the applicable vehicle service procedures.
Always verify the compressor part number, engine model, mounting and drive arrangement, air port dimensions, cooling connections, and operating pressure requirements before installation.