Part 858-653 is a shoulder screw used in critical pivot and adjustment points on ProMark II and PowrLiner equipment. It provides a precise shoulder diameter for controlled rotation or sliding, ensuring accurate alignment and smooth operation.
| Part Number | 858-653 |
|---|---|
| Part Description | Shoulder Screw |
| Brand | Titan |
| Fits |
|
| Condition | New |
The 858-653 Shoulder Screw is a precision fastener used in pivot assemblies, linkage points, and adjustment mechanisms. Its unthreaded shoulder provides a smooth bearing surface, allowing components to rotate or slide freely while maintaining precise alignment and preventing side‑load damage.
A worn, bent, or missing shoulder screw can cause misalignment, excessive play, binding, or premature wear of mating components. Replacing a damaged screw with this genuine Titan part restores correct fit, smooth operation, and equipment reliability.
| Provides bearing surface | Allows pivoting or sliding without thread wear |
|---|---|
| Maintains alignment | Precisely positions components to prevent binding |
| Transfers shear loads | Shoulder carries radial forces, protecting threads from damage |
| Worn shoulder | Visible wear, scoring, or reduction in diameter |
|---|---|
| Bent / damaged | Screw is bent or threads are damaged |
| Excessive play | Loose fit or movement in the assembly |
| Missing / lost | Screw is absent during reassembly |
Part 858-653 is compatible with the following models. Always verify fitment using the correct parts diagram for your specific equipment revision.
| Model | Component |
|---|---|
| ProMark II (Model No 759-2010) | Shoulder Screw |
| PowrLiner 8900 | Shoulder Screw |
| PowrLiner 8900 XLT | Shoulder Screw |
| PowrLiner 8900 XLT SP | Shoulder Screw |
| PowrLiner 6950 | Shoulder Screw |
| PowrLiner 6900 XLT | Shoulder Screw |
| PowrLiner 6900 XLT SP | Shoulder Screw |
| PowrLiner 6000 | Shoulder Screw |
| PowrLiner 5000 | Shoulder Screw |
| PowrLiner 4950 | Shoulder Screw |
| PowrLiner 4900 | Shoulder Screw |
| PowrLiner 4900 XLT | Shoulder Screw |
| PowrLiner 4000 | Shoulder Screw |
| PowrLiner 3100 | Shoulder Screw |
| PowrLiner 2800 | Shoulder Screw |
| PowrLiner 1800M | Shoulder Screw |
| PowrLiner 2800M | Shoulder Screw |
| PowrLiner 800 | Shoulder Screw |
| PowrLiner 4500 | Shoulder Screw |
| PowrLiner 2850 | Shoulder Screw |
| PowrLiner 550 | Shoulder Screw |
| PowrLiner 5500 | Shoulder Screw |
| PowrLiner 4955 | Shoulder Screw |
| PowrLiner 6955 | Shoulder Screw |
| PowrLiner 8955 | Shoulder Screw |
| PowrLiner 3500 72v | Shoulder Screw |
| PowrLiner 3000 | Shoulder Screw |
| PowrLiner 3500s | Shoulder Screw |
When replacing a shoulder screw, inspect these associated components.
Check for wear or deformation; replace if needed to maintain proper spacing.
Inspect the hole or slot where the shoulder rides for elongation or damage.
If threads are stripped, repair or replace the mating threaded component.
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