Titan 138-917 Displacement Rod
OEM Titan Fluid Pump Component
Titan 138-917 Displacement Rod is an OEM high-pressure rod that transfers the air motor's reciprocating movement into the fluid pump on Commander 140-556 and PowrCoat 975 spray systems, while providing the sealing surface for the upper and lower packings.
Compatibility Table
OEM displacement rod restores proper pump drive, provides a smooth sealing surface for packings, and prevents premature packing failure caused by a scored rod.
Titan Fluid Pump Component Replacement
Titan 138-917 Displacement Rod for Commander and PowrCoat 975
Titan 138-917 is an OEM high-pressure displacement rod designed for the Commander 140-556 fluid pump assembly and PowrCoat 975. The rod transfers the air motor's reciprocating movement into the pump and provides the precision surface against which the upper and lower packing sets seal. A smooth, unworn rod is essential for reliable pump pressure and long packing life.
| Detail | Technical / Commercial Information |
|---|---|
| Product Overview | OEM Titan displacement rod used in the Commander 140-556 fluid pump assembly and PowrCoat 975. Transfers air-motor movement into the pump and serves as the sealing surface for the packing sets. |
| Function | Connects to the piston seat and moves reciprocally within the pump cylinder. The upper and lower packings seal against the rod to prevent material bypass. The rod's surface finish is critical: a scored or worn rod will quickly destroy new packings and prevent the pump from building pressure. |
| Industrial Applications | Professional sprayer repair, fluid pump rebuilding, packing replacement, and rental fleet equipment servicing. |
| Compatible Titan Models | Commander 140-556 fluid pump assembly; PowrCoat 975. Also compatible with Titan Atlas 30:1, Atlas III, Commander 60:1, Ensign 12:1, PowrTwin, PowrTwin Classic, PowrTwin II, and SlimLine 12:1. |
| OEM Part Number | 138-917 Displacement Rod. Alternate part number 0138-917. |
| Related Parts Commonly Serviced Together | Upper packing set (138-052A/138-053A), lower packing set (138-153A/138-154A), 142-004 upper packing spring, 140-922 pump cylinder, 138-029 copper gasket, 140-009 O-ring, valve balls, valve seats, and the 140-501 Major Pump Service Kit. |
| Common Problems Solved | Upper packing leaks caused by a worn or scored rod, new packings failing quickly because the rod surface is damaged, loss of pump pressure, and fluid bypass at the packing seals. |
| When Replacement Is Recommended | Replace if the rod shows scoring, wear, or damage to its sealing surface. Always inspect the rod finish whenever repacking the pump, as running new packings against a damaged rod will destroy them quickly. |
| Service Guidance | During pump rebuild, insert the displacement rod through the pump block while holding the packings in place. Place the packing spring and new cylinder gasket over the rod. Secure the piston set in a vise and thread the rod into it. Inspect the rod for scoring before installing new packings. |
| OEM & Brand Information | Genuine Titan OEM component designed for correct fitment in compatible spray systems. |
| Commercial Benefits | Restores proper pump drive, protects packing life, prevents repeated rebuild failure, and maintains reliable pressure and spray performance. |
The 138-917 Displacement Rod is a critical wear component in the fluid section of Commander and PowrCoat pumps. The rod transfers the air motor's power into the fluid pump, and its surface finish directly determines how long the packings will last. A scored or worn rod will destroy new packings quickly, leading to repeated pump failures and pressure loss. Always inspect the displacement rod carefully for scoring or wear whenever the pump is repacked. If the rod surface is damaged, replace it with this genuine OEM component to restore proper sealing and reliable pump performance.
Frequently Asked Questions
Quick contractor-focused answers for confirming fitment, function, and service value.
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