860-936 Screw Shoulder is a genuine OEM replacement fastener for Titan airless sprayers. This shoulder screw is used in pump linkage assemblies, connecting the connecting rod to the piston or drive components. A worn, bent, or stripped shoulder screw can cause excessive play, misalignment, or complete drive failure. Replacing the screw restores proper mechanical connection and reliable pump operation.
| Part Number | 860-936 |
|---|---|
| Part Description | Screw Shoulder (shoulder bolt, pivot pin) |
| Brand | Titan |
| Fits | ProMark II (759-2010); PowrLiner 8900, 8900XLT, 8900XLT SP, 6950, 6900XLT, 6900XLT SP, 6000, 5000, 4950, 4900, 4900XLT, 4000, 3100, 2800, 550, 5500, 4955, 6955, 8955, 3500 72v, 3000, 3500s |
| Condition | New |
The Titan 860-936 Screw Shoulder (shoulder bolt) is a precision fastener used in the pump drive linkage. Its unthreaded shoulder acts as a pivot pin or bearing surface, allowing the connecting rod to articulate smoothly while maintaining exact alignment. This component is critical for converting rotary motor motion into reciprocating pump action.
Over time, shoulder screws can wear at the bearing surface, become bent under load, or have damaged threads. Symptoms include knocking noises, excessive play in the pump drive, reduced output, or complete loss of pumping action. Replacing the shoulder screw with an OEM part restores proper geometry and extends pump life.
| Pivot / bearing surface | Unthreaded shoulder provides a smooth, wear‑resistant pivot point |
|---|---|
| Alignment | Maintains precise position of connecting rod relative to drive shaft |
| Secure fastening | Threaded end locks into place while shoulder carries the load |
| Worn shoulder | Visible scoring, galling, or diameter reduction on the unthreaded section |
|---|---|
| Bent screw | Screw is not straight; causes binding or vibration |
| Stripped threads | Nut or threaded hole will not tighten properly |
| Looseness / play | Excessive movement between connecting rod and drive after tightening |
Part 860-936 is the OEM shoulder screw for the following Titan sprayer models. Always verify with your machine's parts diagram.
| Brand / Model | Component |
|---|---|
| ProMark II (759-2010) | Screw Shoulder |
| PowrLiner 8900 | Screw Shoulder |
| PowrLiner 8900XLT | Screw Shoulder |
| PowrLiner 8900XLT SP | Screw Shoulder |
| PowrLiner 6950 | Screw Shoulder |
| PowrLiner 6900XLT | Screw Shoulder |
| PowrLiner 6900XLT SP | Screw Shoulder |
| PowrLiner 6000 | Screw Shoulder |
| PowrLiner 5000 | Screw Shoulder |
| PowrLiner 4950 | Screw Shoulder |
| PowrLiner 4900 | Screw Shoulder |
| PowrLiner 4900XLT | Screw Shoulder |
| PowrLiner 4000 | Screw Shoulder |
| PowrLiner 3100 | Screw Shoulder |
| PowrLiner 2800 | Screw Shoulder |
| PowrLiner 550 | Screw Shoulder |
| PowrLiner 5500 | Screw Shoulder |
| PowrLiner 4955 | Screw Shoulder |
| PowrLiner 6955 | Screw Shoulder |
| PowrLiner 8955 | Screw ShoulderERC20 |
| PowrLiner 3500 72v | Screw ShoulderERC20 |
| PowrLiner 3000 | Screw ShoulderERC20 |
| PowrLiner 3500s | Screw ShoulderERC20 |
When replacing the shoulder screw, inspect or replace these related components.
The shoulder screw pivots within the connecting rod bushing; inspect the bushing for wear.
The threaded end of the screw engages the drive component; check for stripped threads.
Replace the nut if it no longer holds torque; use threadlocker as specified.
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