Product Overview

The Ingersoll Rand 47667844001 39911631 Oil Filter is a replacement filtration component for compatible Ingersoll Rand compressor lubrication systems. In an oil-injected compressor, the lubricant continuously circulates through the airend and related passages, where it is exposed to heat, mechanical wear, and particles generated or introduced during operation.

The oil filter removes contaminants from the circulating lubricant before the fluid returns to critical compressor components. Keeping these particles out of the lubrication circuit helps reduce contamination-related wear and supports consistent oil flow through the compressor.

This filter is commonly relevant during scheduled compressor service, particularly when the lubricant is replaced or when inspection indicates that the existing filter has reached its service limit. Replacing the filter at the appropriate maintenance interval also gives technicians an opportunity to inspect the condition of the removed element and identify signs of excessive contamination.

The filter should be selected according to the compressor model and applicable service specification. During replacement, the sealing area, filter mounting point, and surrounding lubrication connections should be checked to prevent leakage or installation problems.

Technical Specifications

Product Features

• Filters contaminants from circulating compressor lubricant.
• Protects downstream lubrication passages and components from particulate contamination.
• Suitable for scheduled compressor oil-filter replacement.
• Supports routine preventive maintenance and compressor service work.
• Helps maintain cleaner lubricant circulation within the compressor.
• Applicable to compatible Ingersoll Rand compressor lubrication systems.

Working Principle

Compressor Lubricant → Oil Filter Inlet → Filter Media → Contaminant Retention → Filtered Lubricant → Lubrication Circuit

During compressor operation, lubricant flows through the oil-filter assembly before continuing through the lubrication circuit. The filter media captures suspended particles and other contaminants carried by the circulating oil.

The filtration process helps maintain lubricant cleanliness around components such as the compressor airend and associated lubrication passages.

Important operating considerations include:

• Contaminated oil enters the filter from the compressor lubrication circuit.
• Filter media retains particulate matter as the lubricant passes through.
• Filtered lubricant continues toward the components requiring lubrication.
• Contaminant accumulation gradually increases the restriction across the filter.
• A filter that has reached its service limit should be replaced according to the applicable maintenance procedure.

The condition of the removed filter can also be useful during maintenance. Excessive debris, unusual deposits, or metallic particles may indicate conditions elsewhere in the compressor that require further inspection.

Role in an Ingersoll Rand Compressor System

Oil Reservoir/Separator → Oil Filter → Lubrication Circuit → Airend → Oil Separation and Recovery → Return Circuit

Industrial Applications

Installation and Maintenance

1. Shut down the compressor following the normal equipment shutdown procedure.
2. Isolate the compressor from the connected compressed-air system and allow the equipment to reach a safe service condition.
3. Locate the oil-filter assembly within the compressor lubrication circuit.
4. Remove the existing oil filter using the applicable service procedure.
5. Inspect the removed filter for excessive contamination, metal particles, sludge, or other abnormal deposits.
6. Clean and inspect the filter mounting area and sealing surface before installing the replacement.
7. Install the 39911631 Oil Filter according to the applicable compressor service instructions.
8. Confirm that the filter is correctly seated and that all related connections are secure.
9. Check the lubricant level and replenish or replace the compressor oil when required by the maintenance procedure.
10. Start the compressor and inspect the filter area for oil leakage.
11. Confirm normal compressor operation and monitor the lubrication system after the replacement.
12. Record the filter replacement in the compressor maintenance history.

Related Components / Compatible System Components

Recommended Related Models

Key Advantages

• Removes particulate contamination from circulating compressor lubricant.
• Helps protect lubrication passages and compressor working components.
• Suitable for planned oil-filter replacement during routine service.
• Supports cleaner lubricant circulation within compatible compressor systems.
• Useful for preventive maintenance, troubleshooting, and compressor overhaul work.

Technical FAQs

What does the 39911631 oil filter remove from compressor lubricant?

The filter captures suspended particulate contaminants carried by the circulating compressor oil. The exact type and quantity of contamination depend on the compressor’s operating environment, lubricant condition, and service history.

What can happen if an oil filter remains in service too long?

As contaminants accumulate, filter restriction can increase and affect lubricant flow through the circuit. A filter that has reached its service limit should therefore be replaced according to the maintenance requirements for the specific compressor.

Should the removed oil filter be inspected during replacement?

Yes. Inspecting the removed element can provide useful maintenance information. Unusual quantities of debris, metallic particles, sludge, or other deposits may indicate contamination or wear elsewhere in the compressor.

Is the oil filter normally replaced together with compressor oil?

The two service operations are often performed together because both affect lubrication-system cleanliness. However, the exact maintenance interval and replacement procedure depend on the compressor model, lubricant specification, operating hours, and service requirements.