Graco 164417 Lock Nut
$220.50
In Stock
The Graco 164417 Lock Nut is a durable outer locknut designed to secure displacement rods to the tie plate in multi-pump proportioning systems. Ensures tight, vibration-resistant assembly.
- Used in Bulldog, President, and Hydra-Cat pump models
- Replaces item #122 Outer Locknut in service manuals
- Recommended torque: 53–67 ft-lb (72–91 N·m)
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Genuine OEM Part
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Compatible Machines – Pump Systems
The Graco 164417 Lock Nut (Nut, Lock) is used on multi-pump proportioning systems to secure outer displacement rods at the tie-plate. Confirm with your unit’s parts list before ordering.
- Graco Bulldog proportioning pump models (e.g., 231897 two-pump; 231908, 231910, 231912, 231915 three-pump)
- Graco President / Hydra-Cat / King series proportioning pumps (three-displacement-pump configurations)
- Any Graco pump module listing item #122 = 164417 (Outer Locknut) in the parts drawing
Product Overview
The Graco 164417 Nut, Lock secures the two outer displacement pump rods to the tie plate on applicable proportioning systems. Proper torque during reassembly helps maintain rod alignment and system reliability.
Key Details
| Part Number | 164417 |
|---|---|
| Official Name | Nut, Lock (Outer Locknut in some parts lists) |
| Primary Function | Locks/retains the outer displacement rods to the tie plate on multi-pump assemblies |
| Typical Torque (service ref.) | Approx. 53–67 ft-lb (72–91 N·m) on applicable assemblies (verify in your model’s manual) |
| Notes | Use genuine parts; confirm item #122 = 164417 in your model’s exploded view prior to purchase |
Frequently Asked Questions
| Question | Answer |
|---|---|
| Is Graco 164417 the same as the “outer locknut” shown in some manuals? | Yes. Many proportioning pump diagrams label the outer locknut as item #122, part 164417. |
| Will it fit my Ultra/Ultra Max airless sprayer? | Only if your unit’s pump module parts list explicitly references 164417. Otherwise, it is not used. |
| What torque should I use when installing? | Service references indicate ~53–67 ft-lb (72–91 N·m) on applicable assemblies. Always verify for your exact model. |
| Any installation advice? | Depressurize the system, centre/align rods, then tighten the lock nut to spec to maintain pump alignment. |
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