Graco 161788 Piston Cup Seal Aftermarket | Bedford 4-342

PriceQuantity

$ 25.57

Part #:

161788

MPN:

4-342

Manufacturer:

Bedford Precision Parts

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In Stock

Graco 161788 Piston Cup Seal Premium Quality Aftermarket | Bedford 4-342

The Bedford 4-342 provides a premium quality aftermarket replacement for the Graco 161788 piston cup seal, engineered to deliver reliable sealing performance in spray pump piston assemblies. This precision-molded cup seal maintains proper fluid seal and prevents leakage during pump operation, offering OEM-level performance with significant cost savings for your spray equipment maintenance.

Aftermarket Value Premium Quality Dynamic Sealing

Why Choose This Piston Cup Seal

Precision-engineered for optimal dynamic sealing under pressure
Durable construction provides extended service life
Maintains sealing properties during piston reciprocation
Direct replacement for Graco 161788 with identical performance

Common Applications

Graco airless spray pump pistons
Piston sealing in fluid sections
Pump rebuilds and maintenance
Professional contractor spray systems

Compatible with Graco equipment requiring part number 161788.

What It Fits

Graco spray equipment requiring 161788 piston cup seal
Graco airless spray pump piston assemblies
Equipment requiring Graco part number 161788
Professional spray system piston maintenance

If your equipment specifies Graco 161788, Bedford 4-342 is the correct aftermarket replacement.

Technical Specifications

Aftermarket	Bedford 4-342
OEM	Graco 161788
Part Type	Piston Cup Seal
Material	Premium-grade compounds
Application	Spray pump piston sealing
Compatibility	Graco 161788 applications
Brand	Bedford Precision Parts (Aftermarket)

Installation Notes

Depressurize system completely before maintenance
Clean piston and cylinder thoroughly before installation
Lubricate with compatible pump lubricant for easy installation
Ensure proper orientation and seating on piston
Test system for proper operation and leaks after reassembly

Pro Tip: Always replace piston cup seals during pump rebuilds to ensure optimal sealing performance and prevent fluid bypass.

When to Replace Piston Cup Seals

Reduced pump pressure or performance
Visible wear, cracking, or damage to seal
Fluid leakage past piston during operation
During routine pump maintenance and rebuilds

Bedford vs OEM

Feature	Bedford Aftermarket	OEM (Graco)
Fit & Function	Direct replacement for 161788	Original factory configuration
Sealing Performance	Reliable dynamic sealing under pressure	Original equipment performance
Material Quality	Premium-grade sealing compounds	Factory material specification
Value	Cost-effective replacement solution	Original manufacturer pricing

Frequently Asked Questions

What is the function of a piston cup seal?

The piston cup seal provides essential dynamic sealing between the piston and cylinder in spray pumps, preventing fluid bypass while allowing the piston to move freely during pump operation.

Are these piston cup seals compatible with my Graco equipment?

Yes, these piston cup seals are designed as direct replacements for Graco part number 161788 and are compatible with equipment specifying this part number for piston sealing applications.

How often should piston cup seals be replaced?

Piston cup seals should be replaced during routine pump maintenance or when signs of wear or reduced performance appear. For preventive maintenance, consider replacement during annual service intervals.

What's the difference between piston cup seals and other seals?

Piston cup seals are specifically designed for dynamic sealing applications where the seal moves with the piston, providing reliable sealing during reciprocating motion under high pressure.

Where does it ship from?

If in stock, orders ship from Bedford Hill, New York for quick delivery to your location.

Graco 161788 Piston Cup Seal Aftermarket | Bedford 4-342