Graco 103649 Packing O-Ring
$27.70
In Stock
OEM Graco 103649 Packing O-Ring for sealing the pump/lower assembly—helps maintain pressure and stop leaks. Verify by parts list before ordering.
- OEM fit and reliability
- Seals fluid path to prevent leakage
- Stabilizes pressure & spray pattern
- Used in select Graco pump/lowers
- Match your manual to 103649
Quantity
Genuine OEM Part
Fast Shipping (Order by 1 PM CST)
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Overview & Key Details
The Graco P/N 103649 is an OEM Packing O-Ring used to seal fluid passages within pump/lower assemblies on select Graco airless sprayers. Proper sealing helps maintain pressure, reduce bypass, and prevent leakage for consistent spray performance.
Compatible Machines
Verified model-specific compatibility for 103649 is not publicly enumerated by Graco. This Packing O-Ring appears in pump/lower seal stacks used across multiple Graco airless sprayer platforms. Please confirm against your unit’s parts manual or pump/lower BOM before ordering.
- Used in Graco airless sprayer pump/lower assemblies (model-dependent; verify by parts list).
How to confirm fitment:
- Locate your sprayer’s exact model and series (e.g., “Ultra/Ultra Max II/Mark/GMAX”).
- Open its Graco parts list and check the pump/lower diagram.
- Match the seal stack item number to 103649 before purchase.
Quick Specifications
| Part Number | 103649 |
|---|---|
| Item Type | Packing O-Ring (seal) |
| Brand | Graco (OEM) |
| Application | Pump/lower seal stack; helps maintain pressure and prevent fluid leakage. |
| Material | OEM elastomer (exact compound varies by application; refer to equipment manual). |
| Typical Symptoms of Wear | Loss of prime, pressure drop, visible leaks, pulsation, or inconsistent spray pattern. |
Why This Part Matters
- Maintains proper fluid sealing in the pump for steady pressure.
- Reduces risk of leaks that can cause downtime or coating defects.
- OEM Graco component for reliable fit and durability (when correctly specified).
Installation & Care Tips
- Always depressurize and clean the pump before service.
- Inspect the seal groove and mating surfaces; remove debris and replace any damaged components.
- Use a light compatible lubricant on the Packing O-Ring during installation to avoid nicks.
- Prime and test for leaks; monitor pressure and spray pattern after reassembly.
Frequently Asked Questions
Check your sprayer’s official parts list or pump/lower bill of materials. If the seal stack calls out 103649, this is the correct Packing O-Ring. Model families can share parts, but verification by manual is essential.
Using non-OEM seals can affect chemical compatibility, hardness, and life. For best results, use genuine Graco parts or exact-spec equivalents. Incorrect cross-section or durometer can cause leaks or premature wear.
Loss of prime, pressure fluctuations, visible fluid leakage, or a poor/unstable spray pattern often indicate worn seals. Inspect the entire seal stack; replace related packings if they show wear.
Usually only standard hand tools and the model’s service instructions are required. Avoid sharp picks that can nick the elastomer. Use a compatible assembly lubricant to ease installation.
Visit the official Graco support site and search your exact model to download the manual and parts list. Cross-reference the pump/lower seal stack item number with 103649 to confirm compatibility.
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