Atlas Copco ZA3-4 / ZE45-185 Oil Cooler Kit Replacement – 2906030800

Atlas Copco 2906030800 – ZA3-4 / ZE45-185 Oil Cooler Kit

The Atlas Copco 2906030800 (2906-0308-00) Oil Cooler Kit is a maintenance and service kit designed for compatible Atlas Copco ZA3-4 and ZE45-185 compressor systems. Its purpose is to maintain the oil cooler’s heat-transfer performance and restore components that may become worn or contaminated during compressor operation.

Atlas Copco’s official product catalog identifies the part as “ZA3-4 ZE45-185 OIL COOLER KIT.” Atlas Copco parts-list references also identify 2906-0308-00 as “KIT, OILCOOLER CLEANING.”

Working Process:

During compressor operation, heat is continuously generated by the compression process and by mechanical operation of the compressor components. Compressor oil absorbs a significant portion of this heat and circulates through the oil circuit.

The heated oil flows through the oil cooler, where heat is transferred from the compressor oil to the cooling medium. Depending on the compressor configuration, the cooler uses the applicable cooling arrangement to reduce the oil temperature before the oil returns to the compressor circuit.

Maintaining the correct oil temperature is essential because compressor oil performs several functions, including lubrication, cooling, sealing and protection of internal components.

As operating hours increase, dirt, dust, deposits and other contaminants can accumulate on or inside the cooler. This contamination reduces heat-transfer efficiency and can restrict the intended flow through the cooler.

The 2906030800 Oil Cooler Kit is used during maintenance to clean/service the applicable oil-cooler assembly and replace the components supplied with the kit.

Atlas Copco-related parts documentation specifically lists 2906030800 / 2906-0308-00 as “KIT, OILCOOLER CLEANING.” Another parts reference identifies the kit for the ZA3-4 / ZE45-185 application.

The maintenance process restores the cooler’s ability to transfer heat efficiently from the compressor oil.

A clean and correctly serviced oil cooler allows the heated oil to release heat effectively. The cooled oil can then return to the compressor circuit at the required operating temperature.

If the oil cooler becomes heavily contaminated, heat transfer decreases. The compressor oil temperature can rise above its intended operating range.

Excessive oil temperature can accelerate oil degradation and reduce the effectiveness of lubrication and cooling. It can also increase the thermal load on the compressor and contribute to reduced reliability.

A restricted cooler can additionally increase pressure losses within the oil circuit, potentially affecting oil circulation.

Maintenance Procedure:

Before servicing the oil cooler, the compressor must be stopped, isolated from its energy source, depressurized where applicable, and allowed to cool.

The oil cooler should be inspected for external contamination, internal deposits, corrosion, leakage, damaged connections and restricted passages.

The cooler should be cleaned using the applicable Atlas Copco-approved cleaning procedure. The 2906030800 Oil Cooler Kit should be used to replace the applicable service components supplied for the cooler.

Sealing components such as washers or O-rings must be inspected and replaced where applicable. Sealing surfaces must be clean and free from damage before reassembly.

The cooler should be installed correctly with all connections securely fitted. The oil circuit should then be checked for leakage.

After maintenance, the compressor should be started and monitored while it reaches normal operating conditions.

The oil temperature, pressure, leakage condition and general compressor operation should be monitored for abnormal behavior.

A properly maintained oil cooler should provide effective heat transfer and allow the compressor oil to remain within its intended operating temperature range.

Regular oil-cooler maintenance helps prevent overheating, maintain oil performance, protect lubricated components and reduce the possibility of unplanned compressor downtime.

Using the Atlas Copco 2906030800 Oil Cooler Kit during the appropriate maintenance operation helps restore cooler performance, maintain efficient heat transfer and support reliable compressor operation.

Part Number: 2906030800
Alternative Number: 2906-0308-00 / 2906 0308 00
Brand: Atlas Copco
Part Description: Oil Cooler Kit
Official Catalog Description: ZA3-4 ZE45-185 Oil Cooler Kit
Related Parts Description: Kit, Oil Cooler Cleaning
Application: Compatible Atlas Copco ZA3-4 / ZE45-185 compressor systems
Component Type: Oil cooler service/cleaning kit
Primary Function: Maintains oil-cooling and heat-transfer performance
Secondary Function: Supports cleaning and replacement of applicable cooler service components
Operating Function: Removes heat from circulating compressor oil so that the oil can return to the compressor at the required temperature
Main Benefits: Improved heat transfer, controlled oil temperature, reduced overheating risk, maintained lubrication performance, and improved compressor reliability.

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