Proper Lubrication for GASO Pumps: What You Need to Know

Lubrication is one of the most critical factors in ensuring the reliability and long service life of your GASO pump. Without the right oil, in the right quantity, and with the right maintenance schedule, your equipment is at risk of premature wear, costly downtime, or even failure. This guide covers everything you need to know about crankcase lubrication for GASO pumps.

How Lubrication Works in the Power End

In GASO pumps, all parts in the power end are lubricated by splash from oil inside the crankcase. This simple but effective system relies on maintaining the correct oil level and using a lubricant that meets strict performance standards.

Important Note: Pumps are drained of oil after factory testing. Always remove the narrow crosshead guide hand hole cover on top of the frame and add lubricant before operating the pump.

Choosing the Right Crankcase Oil

The correct oil does more than lubricate—it protects your pump from wear, corrosion, and oxidation. Here are the key guidelines:

• Viscosity & Standards: For most operating conditions in average climates, use SAE 90EP, AGMA 5EP, or AGMA 6EP gear lubricants.
• Additives: Always choose an EP lubricant that contains rust, oxidation, and foam inhibitors but does not react corrosively with bronze.
• Do Not Use: Multipurpose or multi-viscosity gear lubricants are unsatisfactory for GASO pumps and should be avoided.

Crankcase Oil Capacity by Pump Series

For pump speeds below 150 RPM, always maintain oil at the crankshaft centerline. Once filled, reinstall the crankcase cover and breather(s) to allow proper ventilation.

Temperature Considerations

• Normal Running Temperature: Crankcase oil should not exceed 180°F during operation.
• If Oil Runs Hotter: Check mechanical fits first. If they’re correct, consider installing a separate oil cooler.
• Cold Weather Operation: Choose an oil with a pour point lower than the lowest anticipated ambient temperature. For extreme or unusual conditions, consult IEQ Industries or the GASO factory for recommendations.

Daily Oil Inspection and Maintenance

To protect your pump, daily inspections and routine maintenance are essential:

• Check Daily: Inspect oil level and appearance.
• Change Regularly: Replace oil and clean the breather every six months or after 2,000 hours of operation (whichever comes first). Under severe operating conditions, service should be performed more frequently.
• Thorough Cleaning: Each oil change should include a full cleaning of the crankcase.

Signs of Oil Contamination

• Saltwater Ingress: Oil becomes white, milky, or foamy within hours.
• Moisture Condensation: Oil gradually turns dark or rusty brown.

If contamination is detected, take these steps immediately:

1. Drain the crankcase completely.
2. Remove the crankcase cover and crosshead guide hand hole cover.
3. Thoroughly flush the system with clean oil.
4. Refill to the proper dipstick level, being careful not to overfill.
5. Clean the breather and check for sources of contamination or leaks.

When to Suspect Excessive Oil Loss

If oil loss is greater than expected, check these areas:

• Crankcase stuffing box packing
• Oil retained on the pinion shaft
• Clogged or dirty crankcase breather
• Replacing oil lost to leakage before the level drops too low is vital to prevent damage to moving parts.

Final Thoughts

To ensure your pump is properly lubricated, you must ensure you are using the correct lubricant, monitoring conditions daily, and following a disciplined maintenance schedule. By keeping a close eye on crankcase oil condition, level, and temperature, you can maximize the efficiency and longevity of your GASO pump while minimizing the risk of costly downtime.