Pump Rod Sealing & Wiper System Overview for Airless Sprayer Maintenance
Compatible Machines
- Graco Ultra Max II Series Airless Sprayers (390, 395, 490, 495, 595)
- Graco GMax Series Gas Airless Sprayers (3400, II Series)
- Graco Mark Series Airless Paint Sprayers (Mark IV, Mark V)
- Graco Industrial Pump Systems (Xtreme, King Airless Pumps)
What is Graco 177973 Band, Wiper?
The Graco 177973 Band, Wiper is a precision sealing and cleaning component used in Graco airless paint sprayer pump assemblies. Its primary function is to continuously wipe and clean the piston rod during operation, preventing paint buildup, contaminants, and debris from entering the pump packings.
By maintaining a clean rod surface, the band wiper helps extend the life of internal pump seals, improves spray consistency, and reduces premature wear in high-pressure spraying environments.
Key Function & Benefits
- Removes paint residue from the piston rod during every stroke
- Protects internal packings from contamination and damage
- Improves pump efficiency and spray consistency
- Reduces maintenance frequency and downtime
- Supports longer service life of the pump assembly
Product Role in Pump Assembly
Installed within the pump housing, the Graco 177973 Band, Wiper works in coordination with sealing packings and rod components. It acts as the first line of defense against external contamination, ensuring that only clean, properly lubricated motion occurs inside the hydraulic and fluid sections of the sprayer.
Frequently Asked Questions
It continuously cleans the piston rod during operation, preventing paint buildup and protecting internal pump seals from premature wear.
If you notice paint leakage, reduced pump performance, or visible wear on the piston rod area, it may be time to replace the wiper band.
No, it is compatible only with select Graco airless sprayer pump assemblies. Always verify your model and pump part number before ordering.
Delayed replacement can lead to contamination inside the pump, increased wear on packings, and reduced spraying efficiency.
