Powr part 759-428 is a caster stem – the vertical shaft that attaches the swivel caster wheel to the frame of compatible PowrLiner sprayers. This component provides the pivot point for steering and supports the weight of the machine during transport. Replacing a bent, worn, or broken caster stem restores smooth maneuverability, prevents wobble, and ensures safe, stable movement of the sprayer.
| Part Number | 759-428 |
|---|---|
| Part Description | Caster Stem |
| Brand | Powr |
| Fits | PowrLiner 1800M, 2800M, 2850 |
| Condition | New |
The Powr 759-428 Caster Stem is a key component of the front caster assembly on PowrLiner 1800M, 2800M, and 2850 sprayers. This precision‑machined stem fits into the caster yoke and mounts to the machine frame, providing the pivot point that allows the front wheel to swivel for easy steering and maneuverability. It also bears the load of the machine during transport.
Over time, caster stems can become bent from impact, worn at the bearing surfaces, or corroded from exposure to chemicals and moisture. A damaged stem causes the caster to wobble, bind, or fail to swivel smoothly, making the sprayer difficult to steer and potentially unsafe to move. Replacing a worn or damaged caster stem restores precise steering, eliminates play, and ensures the sprayer rolls smoothly and safely.
| Swivel pivot | Provides the vertical axis for the caster to rotate, enabling steering |
|---|---|
| Load support | Transmits weight from the machine frame to the caster wheel |
| Alignment | Ensures the caster remains perpendicular to the ground for stable rolling |
| Bent stem | Visible bending that causes the wheel to tilt or wobble |
|---|---|
| Worn bearing surface | Grooves, scoring, or excessive wear where the stem contacts bearings or bushings |
| Corrosion / pitting | Rust or chemical damage that affects smooth rotation |
| Excessive play | Noticeable looseness in the caster assembly even after tightening hardware |
Powr part 759-428 is used in the following models. Always confirm fitment using your machine's parts diagram.
| Model | Component |
|---|---|
| PowrLiner 1800M | Caster Stem |
| PowrLiner 2800M | Caster Stem |
| PowrLiner 2850 | Caster Stem |
When replacing the caster stem, these components are often inspected or replaced to ensure a complete and reliable repair.
Inspect the caster wheel for wear and the yoke for cracks or distortion. Replace if damaged.
The stem rides on bearings or bushings; replace them if worn to eliminate play.
Use new hardware when reinstalling to ensure proper torque and secure attachment.
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