Graco 164704 – Cylinder Cap Nut secures the air-motor cylinder and trip rod for reliable sealing and alignment. Use when the original nut is worn, leaking, or won’t hold torque.
The following Graco pump families are confirmed to use Graco 164704 – Cylinder Cap Nut (verify against your unit’s parts list/serial range):
The Graco 164704 Cylinder Cap Nut secures the air-motor cylinder assembly, helping maintain proper alignment and sealing between the cylinder, trip rod, and upper air-motor components. If worn or damaged, the motor can loosen or leak; replacing this nut restores reliable operation.
| Attribute | Details |
|---|---|
| Part Number | 164704 |
| Item Name | Cylinder Cap Nut (air-motor cylinder cap nut) |
| Function | Locks and seals the air-motor cylinder to the upper housing; threads onto trip rod during assembly/service. |
| Used On | Monark 23:1 air motors; Fire-Ball 15:1 (e.g., 206699/206700) |
| Replacement Tip | Inspect threads and sealing face; replace if rounded, cracked, or if air-motor shows loosening/leak. |
Subscribe to our newsletter to get exclusive discounts and new theme launches right in your inbox.
You may unsubscribe at any moment. For that purpose, please find our contact info in the legal notice.
