Graco 100828 Flexible Coupling
$82.75
In Stock
Graco 100828 Flexible Coupling connects the air motor shaft to the gear reducer or agitator shaft in Graco mixing and pressure-tank systems, helping reduce vibration and shaft wear.
- OEM Graco replacement part for perfect fit
- Absorbs misalignment and vibration
- Used in agitators and pressure tanks
- Ensures smooth, reliable performance
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Genuine OEM Part
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Graco 100828 Flexible Coupling – Fitment & OEM Details
Compatible Machines
This OEM coupling connects the air motor shaft to the gear reducer/agitator shaft in Graco mixing and pressure-tank systems. Verify against your unit’s parts manual before ordering.
- Graco Heavy-Duty Stainless Steel Agitator — Models 236661, 236662, 236663
- Graco Pressure Tank with Agitator — Model 236859 (2-gallon system)
- Graco Xtreme-Duty Agitator / Agitator Packages — assemblies where 100828 is specified in the parts list
- Other Graco agitator/pressure-tank setups that call for Part 100828 in their official parts drawings
Product Overview
The Graco 100828 Flexible Coupling is a genuine OEM component designed to accommodate slight shaft misalignment, damp vibration, and protect the drive train in agitator and pressure-tank systems. Using the correct OEM coupling helps maintain reliability and prolong bearing and seal life.
Quick Facts
| Part Number | 100828 |
|---|---|
| Part Type | Flexible Coupling (motor-to-reducer/shaft connection) |
| Typical Application | Agitators & pressure-tank systems; air-motor shaft to gear-reducer/agitator shaft |
| Compatibility | Models listed above and any Graco assembly whose parts manual specifies 100828 |
| Why Flexible? | Absorbs minor misalignment & vibration to reduce wear on bearings, seals, and shafts |
Key Features
- OEM Graco replacement for assured fit and performance
- Helps minimize vibration and shock loads during start/stop cycles
- Supports smoother operation and longer service intervals
- Suitable for heavy-duty coating/mixing environments
Installation & Care Tips
- Fully depressurize system and isolate power/air before service.
- Clean and inspect both shafts; align coupling halves per the manual.
- Set/torque setscrews to spec and confirm recommended axial gap if called out.
- After first run-in, recheck fasteners and listen for abnormal vibration.
- Inspect periodically for cracking, wear, or backlash; replace at first sign of damage.
Frequently Asked Questions
Match the coupling number in your unit’s parts manual or nameplate. If your drawing lists 100828, this is the correct part. When in doubt, share your model and serial with support to verify.
Increased vibration, rattling/clunking, visible cracks, or set-screws that won’t hold torque. Inspect after seal/bearing failures or whenever shafts were misaligned.
Yes—follow the Graco service manual for your assembly. Many setups call for a small axial gap and correct key/flat alignment before tightening set-screws to spec.
Not recommended. This part is specified as a flexible coupling to tolerate slight misalignment and reduce vibration. A rigid coupling can overload bearings and seals.
Check alignment during reassembly, re-torque set-screws after initial run, keep shafts clean and free of burrs, and inspect during routine service intervals.
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