Proper maintenance is essential for maximizing the performance and lifespan of your Wacker WP1540 and WP1550 plate compactor. While most equipment owners know the importance of changing engine oil, many overlook the crucial task of servicing the Exciter. Regularly changing the Exciter oil prevents costly breakdowns and ensures your compactor continues to deliver powerful, reliable compaction on every job.

What Is the Exciter on a Plate Compactor?

The Exciter, sometimes called the shaker, transmission, or vibrator box, is the heart of your plate compactor’s vibration system. This assembly houses an eccentric shaft, typically located at the front of the compactor or below the engine, depending on the model. Driven by the engine via a drive belt, the Exciter’s eccentric shaft generates the vibrations that enable the compactor to move and compact materials efficiently.

Why Exciter Oil Changes Matter?

Unlike many other plate compactors that feature a drain/fill plug and sight glass for easy maintenance, the Wacker WP1540 and WP1550 have a sealed Exciter unit. This design can give the false impression that the Exciter oil never needs to be changed. However, Wacker recommends changing the Exciter oil once per year or every 300 hours of operation. Neglecting this maintenance can lead to bearing failure, overheating, and expensive repairs.

How Often Should You Change Exciter Oil?

For optimal performance and longevity, change the Exciter oil in your Wacker WP1540 or WP1550 plate compactor:

• Once every year
• Or every 300 hours of use (whichever comes first)

This simple maintenance step takes about an hour and can save you hundreds of dollars in replacement parts and downtime.

What Type of Oil Does the WP1540 & WP1550 Exciter Use?

Required Tools

• Socket set (metric)
• Screwdriver (Phillips)
• Oil drain pan
• Funnel
• Shop rags
• ATF (automatic transmission fluid) - 150 ml (5 oz)
• 75-90W oil - 150 ml (5 oz)
• Work gloves
• Safety glasses

Step-by-Step: How to Change the Exciter Oil on a Wacker WP1540 or WP1550

1. Remove the beltguard, belt, and hose from the water tank.
2. Remove the four screws securing the console assembly to the baseplate. Lift the console assembly from the baseplate.
3. Remove the end cover from the bearing exciter assembly. The outer bearing race will remain with the cover.
4. Tip the baseplate up and drain the used fluid from the exciter assembly. Dispose of the old fluid properly by contacting your local recycling center.
5. Add 150 ml (5 ounces) of the recommended fluid to the exciter housing. (Do not overfill- overfilling can cause the bearings to overheat.)
6. Replace O ring on cover, then reattach the end cover to the exciter assembly.
7. Reassemble the console assembly to the baseplate and reinstall the belt, beltguard, and hose to the water tank.

Frequently Asked Questions

Q1. How often should I change the Exciter oil

Change the Exciter oil once per year or every 300 hours of operation, whichever comes first.

Q2. What type of oil should I use in the Exciter?

Use 150 ml (5 ounces) of automatic transmission fluid (ATF) or 75-90W oil as specified in your model’s technical data.

Q3. Can I skip Exciter oil changes if the unit is sealed?

No. Even though the Exciter is sealed, Wacker recommends regular oil changes to prevent bearing failure and overheating.

Key Takeaways for Wacker Exciter Maintenance

• Change Exciter oil every year or 300 hours to prevent costly repairs and downtime.
• Use the correct type and amount of lubricant based on your serial number.
• Follow the step-by-step guide for safe and effective maintenance.
• Contact DHS Equipment for quality Exciter parts and support.

Where to Find Wacker Neuson Exciter Parts and Support

If your Exciter needs high-quality OEM and Aftermarket replacement parts, DHS Equipment carries a full line of Exciter rebuild parts, including bearings, housings, repair kits, shaft seals, eccentric shafts, O-rings, and pulleys. For expert support or help finding the right parts for your Wacker WP1540 or WP1550, contact us online, call toll-free at 866-611-9369, or email us at [email protected].

How-To Video

Watch this video from DHS Equipment for helpful tips and tricks for maintaining your Wacker Neuson Plate Compactor's Exciter!

Author: David Schatz

David Schatz is the founder of DHS Equipment and a technical content expert in light construction equipment, small engines, and professional-grade replacement parts. With more than 30 years of hands-on experience servicing concrete saws, generators, water pumps, and plate compactors, he helps contractors, rental fleets, and serious DIY users keep their equipment running safely and efficiently.

Through practical, no-nonsense articles, step-by-step guides, and maintenance tips, David focuses on real-world troubleshooting, small engine repair, and clear recommendations on OEM and high-quality aftermarket replacement components that reduce downtime, extend equipment life, and improve job site productivity.