Graco 104664 Spring, Compression – Critical Return Mechanism Component
Compatible Machines
- Graco hydraulic motors and pump assemblies
- Graco piston-driven fluid handling equipment
- Graco spray and finishing rigs requiring precision return force
- Graco OEM service kits for internal valve and actuator systems
Product Description
The Graco 104664 Spring, Compression is a precision-engineered compression spring designed to provide reliable return force and consistent pressure within Graco hydraulic and fluid-handling components. It supports repeatable motion cycles, stabilises internal assemblies, and maintains mechanical integrity under demanding operational conditions.
Key Features
- High-strength alloy construction for long service life and resistance to fatigue
- Correct preload and travel characteristics tailored to Graco equipment requirements
- Compact form factor that fits seamlessly into existing assemblies
- OEM-specified part ensuring compatibility and performance within Graco systems
- Low-maintenance design helps uphold operational uptime and system reliability
Technical Specifications
| Specification | Details |
| Part Number | 104664 |
| Component Type | Compression Spring |
| Intended Use | Internal return or preload spring in Graco hydraulic and fluid-handling assemblies |
| Material | High-tensile alloy (industrial grade) |
| Service Environment | High-cycle, high-pressure spray and fluid systems |
Applications
The Graco 104664 Spring, Compression is used in assemblies where reliable return force, motion reset, or preload action is required — such as hydraulic motors, actuators, piston assemblies, and fluid-control valves in Graco spraying and finishing equipment. It plays a crucial role in ensuring consistent mechanical response and system performance.
Performance Advantages
- Ensures consistent actuation cycles by providing stable return force
- Reduces mechanical variation and enhances system repeatability
- Minimises downtime by offering a durable, low-wear component
- Supports precise motion and pressure control within high-performance systems
- Helps preserve OEM calibration and mechanical timing by maintaining correct spring characteristics
Maintenance Tips
Inspect the spring during routine servicing for signs of fatigue, deformation, or corrosion. Replace if coil spacing becomes inconsistent, preload reduces, or if the associated mechanism shows delayed return or slippage. Ensure the mounting seats are clean and the spring is installed according to factory orientation and preload specifications.
Frequently Asked Questions
It provides controlled return force and preload within internal mechanisms of Graco hydraulic or fluid-handling systems, maintaining proper motion and timing.
It’s used in Graco piston assemblies, hydraulic motors, valve return mechanisms, and other internal components requiring precise preload and return force.
Replace it if you notice reduced responsiveness, uneven motion, coil distortion, or if the associated mechanism fails to return to position reliably.
While technically possible if dimensions and load match, using the OEM-specified spring ensures correct preload and system calibration — non-OEM alternatives may affect timing, motion and warranty.
