The sprocket slip detection card in a Ross Hill / NOV system — drawworks drivetrain protection.
Independent sourcing, not an authorized distributor. Ross Hill and NOV are trademarks of their respective owners, used here for reference only. We supply this item as new-surplus, used-tested, and reconditioned, with condition disclosed before sale.
| Part number | 0509-2600 |
|---|---|
| EI reference | EI-0509-2600 |
| Stock code | EL09-2600-00 |
| System | Ross Hill / Hill Hayes / NOV SCR drilling |
| Function | Drawworks protection |
| Condition | New-surplus, used-tested, reconditioned |
| Also searched as | 0509-2600 · 05092600 · 2600 · EI-0509-2600 · EL09-2600-00 · Ross Hill · NOV · Hill Hayes |
Sprocket slip detection watches for a drivetrain discrepancy at the drawworks and acts before mechanical damage compounds. It is a protection function, which means a failed card is invisible during normal operation and only matters at the moment you need it. That makes it worth verifying rather than assuming healthy.
Most people arrive at this page from a symptom, not a part number. These are the failure signatures associated with this item. They are starting points for diagnosis, not a substitute for it.
| What you are seeing | What it usually indicates |
|---|---|
| Nuisance slip trips during normal hoisting | Detection threshold or card drifted |
| No protection response during a genuine event | Detection path failed — protection absent |
| Intermittent alarm that tracks vibration | Sensor wiring or connector before card |
| Alarm will not reset | Latch circuit on the card |
Revisions differ across the production life of this equipment, and on some Ross Hill items the dash suffix carries a calibration rather than a revision level. We verify the exact dash number and revision against the physical unit before quoting, and we will send photos of the plate on the unit we are offering.
Send a photo of your nameplate, or type out what it reads, and we will match the revision rather than guess at it.
Supplied as new-surplus (unused, from the secondary market), used-tested, or reconditioned, with condition disclosed before sale and photos on request. Availability on legacy Ross Hill and NOV items changes constantly — send the number and we will tell you what we can actually find rather than quote something we cannot deliver.
Condition always disclosed before sale. Photos on request. Same-day response on most requests.
Condition disclosed before sale. Same-day response on most requests.