When maintaining an older Sullair screw air compressor, identifying the correct cooling component can be more difficult than it appears.

One part number can be listed differently across aftermarket catalogs, while similar-looking coolers may have different applications, connections or mounting configurations. This is why checking the complete part number and compressor information is important before ordering a replacement.

The Sullair 88290001-358 is one example. It is widely listed in the replacement-parts market as a Sullair compressor cooler and is associated with LS20-125 and LS20-150 applications in several public parts listings. However, different suppliers do not always describe the exact cooler type in the same way. Some identify 88290001-358 as an oil cooler, while other cooler catalogs distinguish 88290001-357 as an oil cooler and 88290001-358 as an aftercooler.

For this reason, the safest way to purchase a replacement is to verify the part number, compressor model, serial number and existing cooler configuration together.

88290001-358 is a Sullair replacement cooler part number used in compressor cooling applications.

Public replacement-parts listings associate this number with Sullair compressor models including the LS20-125 and LS20-150. The part number is therefore an important reference when searching for a replacement component.

However, a part number should not be considered interchangeable with another cooler simply because the components look similar.

When identifying a replacement cooler, the following information should be considered together:

Sullair part number

Compressor model

Compressor serial number

Existing cooler configuration

Connection arrangement

Mounting arrangement

Previous maintenance or purchasing records

This is especially important for older Sullair compressors that may have received replacement components during previous maintenance.

A compressor cooling system may contain several different heat-exchange components.

Depending on the compressor design, these can include:

Oil coolers

Aftercoolers

Air-to-air or air-to-fluid heat exchangers

Cooling fans

Temperature-control components

Related hoses, pipes and seals

These components perform different functions even when they are physically installed close to one another.

A common purchasing mistake is to search only for:

"Sullair compressor cooler"

and select the first component that looks similar.

For industrial compressor spare parts, this approach can result in a mismatch.

The complete part number 88290001-358 should therefore be used as the starting point for identification.

This is an important question because public aftermarket sources do not describe the part consistently.

Several current market listings identify 88290001-358 as an oil cooler or cooler for Sullair LS20-125/150 compressors. Other replacement-cooler catalogs list 88290001-357 as an oil cooler and 88290001-358 as an aftercooler.

Because of this difference, buyers should not determine the cooler type from a supplier title alone.

Before ordering, compare:

The part number on the existing component

The compressor nameplate

The compressor serial number

The existing cooler position

The fluid or air connections

The applicable parts documentation

If you already have 88290001-358 documented for your compressor, provide that number when requesting a quotation.

If the number is uncertain, photographs and compressor identification information should be checked first.

Several public parts listings associate 88290001-358 with Sullair LS20-125 and LS20-150 compressors.

This makes the LS20-125/150 application an important search term for buyers trying to identify the component.

However, compressor models alone should not always be treated as sufficient proof of compatibility.

The same compressor family can have different configurations depending on production version, cooling arrangement, machine history and component revisions.

For this reason, a more reliable identification method is:

Part Number + Compressor Model + Serial Number

rather than:

Compressor Model Only

If you are ordering a replacement for an older LS20 compressor, providing a clear nameplate photograph can help avoid confusion.

One of the most useful comparisons when researching this cooler is the difference between:

88290001-357

88290001-358

These part numbers are frequently displayed together in replacement-parts listings for Sullair LS20-125/150 applications.

However, similar part-number sequences do not automatically mean that the components are interchangeable.

Different cooler part numbers may correspond to different:

Cooling functions

Flow paths

Connection arrangements

Mounting configurations

Compressor applications

Production configurations

Therefore, do not replace 88290001-358 with 88290001-357 simply because the two products look similar or are listed for the same compressor family.

The correct replacement should be confirmed against the applicable parts information.

If you are trying to determine whether 88290001-358 is the correct replacement for your compressor, use the following checklist.

1. Find the Existing Part Number

Check the existing cooler for:

Part-number labels

Stamped identification

Previous service labels

Replacement records

Packaging labels

Previous purchase invoices

If you can confirm 88290001-358, keep a record of the complete number.

2. Photograph the Compressor Nameplate

Take a clear photograph of the compressor nameplate.

The photograph should ideally show:

Manufacturer

Compressor model

Serial number

Other identification information

Avoid sending only a partial photograph where the serial number or model is unreadable.

3. Photograph the Existing Cooler

Useful photographs include:

Full view of the cooler

Front and rear views

Connection areas

Mounting points

Identification labels

Any visible damage

Installation position inside the compressor package

4. Check the Cooler Connections

The connection arrangement is useful as supporting identification information.

Compare:

Number of connections

Connection positions

Connection direction

Mounting location

However, connection appearance alone should not be used as final proof of compatibility.

5. Check Previous Maintenance Records

Older compressors may have had components replaced during previous service.

A previous invoice, parts list or maintenance record may provide more useful information than the appearance of the existing component.

A compressor cooling problem does not automatically mean that the cooler has failed.

However, the following conditions can justify further inspection:

Oil or Fluid Leakage

Visible leakage around the cooler or its connections should be investigated.

The source may be the cooler itself, a seal, a connection, a hose or another nearby component.

Abnormally High Operating Temperature

High compressor temperature can have multiple causes.

Possible factors include:

Restricted airflow

Dirty cooling surfaces

Cooling fan problems

Lubricant-related issues

Temperature-control problems

Cooler blockage

Other cooling-system faults

Replacing the cooler without diagnosing the actual cause may not solve the problem.

External Damage

Bent, cracked or severely corroded cooler components should be inspected to determine whether replacement is necessary.

Reduced Cooling Performance

If the compressor's cooling performance changes, the entire cooling system should be evaluated rather than assuming that the cooler is the only possible cause.

When troubleshooting a Sullair compressor, it is useful to separate cooler failure from general cooling-system problems.

For example, a dirty cooler surface may reduce heat transfer without the cooler itself being mechanically damaged.

Likewise, a failed fan can produce higher operating temperatures even when the cooler is still in usable condition.

Other possible causes include:

Incorrect airflow

Blocked ventilation

Lubricant problems

Temperature-control components

Damaged hoses

Restricted passages

Incorrect installation

Other mechanical problems

This is why a cooler should be diagnosed as part of the complete compressor cooling system.

Heat exchangers can have very similar external appearances.

Two coolers may appear almost identical while having different:

Internal flow paths

Connection arrangements

Mounting points

Heat-transfer requirements

Compressor applications

Part numbers

A visual comparison can therefore support identification but should not replace part-number verification.

For Sullair compressor parts, the safest approach is to begin with the documented part number and then verify the compressor configuration.

If you are requesting a quotation for Sullair 88290001-358, providing the following information can make the verification process faster:

Part number: 88290001-358

Required quantity

Compressor model

Compressor serial number

Compressor nameplate photograph

Existing cooler photograph

Existing part-number label

Destination country

If you already have a confirmed 88290001-358 reference, you can send the part number and quantity first.

If you are uncertain about the part number, send the compressor nameplate and existing cooler photographs before placing an order.

This is particularly useful for older Sullair compressors where the original parts documentation may no longer be available.

When buying a Sullair replacement cooler, buyers should clarify the required supply type before placing an order.

Depending on the supplier and availability, options may include:

Genuine Sullair parts

OEM-supplied components

Aftermarket replacement coolers

These categories should not be treated as identical.

If a genuine Sullair component is required, state this clearly when requesting a quotation.

If an aftermarket replacement is acceptable, ask the supplier to confirm the replacement part number and application.

The supply status should always be confirmed rather than assumed from a product photograph or marketplace listing.

For industrial compressor spare parts, the lowest-risk purchasing process is usually based on identification rather than appearance.

A practical verification sequence is:

Part Number → Compressor Model → Serial Number → Existing Component → Application Confirmation → Quotation

This process is particularly useful when purchasing parts for older compressors.

If the part number is already confirmed as 88290001-358, the supplier can start from that reference.

If the part number is uncertain, the compressor identification information becomes much more important.

Before placing an order, check the following:

Is the part number 88290001-358 confirmed?

Is the compressor model known?

Is the compressor serial number available?

Has the existing cooler been photographed?

Has the cooler type been confirmed?

Have 88290001-357 and 88290001-358 been distinguished?

Has the mounting and connection configuration been checked?

Has the supply type been confirmed?

Has the destination country been provided for quotation?

If any of these points remain unclear, it is better to verify the application before purchasing.

The Sullair 88290001-358 is a replacement cooler part number associated in public parts listings with Sullair compressor applications, including LS20-125/150.

However, publicly available replacement catalogs do not describe the component consistently, particularly when comparing 88290001-357 and 88290001-358.

For this reason, the correct replacement should be identified using more than a product photograph or a general compressor model.

The most useful information is:

Part Number + Compressor Model + Serial Number + Existing Cooler Photos

If you are looking for Sullair 88290001-358, verify the application before ordering and provide the available compressor information to your parts supplier.

For replacement requirements, you can also refer to our Sullair 88290001-358 cooler product page for product information and quotation inquiries.