Sullair ShopTek (ST409–ST1509)
5–20 hp small-frame oil-flooded rotary screw. Fixed-speed only; direct- or belt-driven depending on frame.
- Load/Unload
- Small shops
- Light manufacturing
Specs & intervals below are from publicly published OEM literature and long-standing field practice. Torque values, exact revision-dated part numbers, and safety-critical settings vary by serial number — always cross-check the unit’s OEM manual and nameplate before ordering parts or performing service.
| Category | Interval | Source |
|---|---|---|
| Air filter | 2,000 hr or ΔP | |
| Fluid filter | 2,000 hr | |
| Separator element | 4,000 hr | |
| V-belt (belt-driven variants) | Annual inspect | |
| Motor bearings | Per motor plate |
Consumable part numbers change by revision and region — pull the current number from the OEM portal.
OEM part numbers with commonly-cited aftermarket equivalents. Verify against the nameplate and OEM parts portal before ordering — dimensionally similar filters can still be wrong for the application.
- P822768— Donaldson
- PA2815— Baldwin
- P550779— Donaldson
- LF3325— Fleetguard
- P532966— Donaldson
- OS 5262— Hifi
Need to look up a number across all models? Use the parts cross-reference search.
- Check fluid level in sight glass at running temp
- Listen for unusual noise / vibration
- Check discharge pressure & temperature vs baseline
- Verify condensate drain function
- Log package amps if metered
- Blow down receiver and drain traps
- Check for oil carryover at first drop leg
- Inspect for fluid or air leaks around airend and separator tank
- Verify safety valve is not weeping
- Change fluid filter
- Change air filter (or sooner per ΔP)
- Sample fluid for TAN / metals / water
- Clean cooler exterior with low-pressure air (never > 30 psi against fins)
- Change separator element
- Change fluid
- Inspect scavenge line & orifice for coking
- Check coupling / belt alignment & wear
- Torque electrical lugs to spec (typ. 45–75 in-lb #4–2/0 AWG)
- Rebuild inlet valve
- Rebuild minimum-pressure check valve
- Regrease or replace motor bearings per OEM interval
- Verify safety valve setpoint against gauge
- Discharge temp high — cooler / fan
- Separator alarm at 4k hr
- Sullair Supervisor / WS Controller — Supervisor: 5.7" color TFT with membrane keys; WS Signal: 4-line 20-char monochrome LCD.
- Compact commercial-duty package
- Tank + dryer option (ShopTek T)
- Fewer sequencing options than LS-Series controller
ShopTek is Sullair's small-shop line, positioned below LS-Series in duty rating.