STSDSTSD (VSD)STSPSTSP (VSD)STSP2STSP2 (VSD)
⚠ Warning Before performing any maintenance: stop the compressor, close the air outlet valve, press Emergency Stop, disconnect power at the mains, and vent the separator tank by loosening the oil filler plug 1–2 turns. Confirm zero pressure before opening any connection.
▲ Attention — Three Sub-Model Schedules The STSD, STSP, and STSP2 have different replacement intervals for oil, oil filter, air filter, and separator elements. Use the correct table for your specific model. Highlighted rows (yellow) indicate where intervals differ between sub-models.
STSD / STSD (VSD) Replacement Schedule
"R" = Replace. All intervals are whichever comes first.
| Component | Interval | 2,000 h | 4,000 h | 8,000 h | 16,000 h / 20,000 h |
|---|---|---|---|---|---|
| Oil (2)(3)(4) | 2,000 hrs or 6 months | R | R | R | R |
| Oil Filter Element (1)(3)(4) | 2,000 hrs or 6 months | R | R | R | R |
| Air Filter Element (1)(3)(4) | 2,000 hrs or 6 months | R | R | R | R |
| Air Filter Clogging Indicator (4) | 4,000 hrs or 6 months | R | R | R | |
| Cabinet Air Suction Filters (1)(4) | 2,000 hrs or 6 months | R | R | R | R |
| Separator Element (1)(3)(4) | 4,000 hrs or 6 months | R | R | R | |
| Separator O-ring/Gasket (4) | 4,000 hrs or 6 months | R | R | R | |
| Oil Filling Plug O-ring (4) | 4,000 hrs or 6 months | R | R | R | |
| Thermostatic Valve Kit (4) | 8,000 hrs or 12 months | R | R | ||
| Oil Filter Clogging Sensor (4) | 8,000 hrs or 12 months | R | R | ||
| Minimum Pressure Valve Service Kit (4) | 8,000 hrs or 12 months | R | R | ||
| Carbon Graphite Brush — VSD models only (4) | 8,000 hrs or 12 months | R | R | ||
| Suction Control Valve Service Kit (4) | 16,000 hrs or 24 months | R | |||
| Solenoid Valve (4) | 16,000 hrs or 24 months | R | |||
| Hydraulic Hoses (4) | 16,000 hrs or 24 months | R | |||
| Pneumatic Hoses (4) | 16,000 hrs or 24 months | R | |||
| Coupling Elastomer (4) | 16,000 hrs or 24 months | R | |||
| Pressure Transmitter (4) | 16,000 hrs or 24 months | R | |||
| Thermometer Sensor (NTC) (4) | 16,000 hrs or 24 months | R | |||
| Safety Valve (4) | 16,000 hrs or 24 months | R | |||
| Airend Sealing Kit (4) | 16,000 hrs or 24 months | R | |||
| Airend General Maintenance (Revision Kit) (4) | 20,000 hrs or 30 months | R | |||
| Electric Motor Bearings (4) | 20,000 hrs or 30 months | R | |||
| Electric Motor Greasing (if nipple present) | See motor nameplate | ||||
STSP / STSP (VSD) Replacement Schedule
| Component | Interval | 4,000 h | 8,000 h | 16,000 h / 20,000 h |
|---|---|---|---|---|
| Oil (2)(3)(4) | 4,000 hrs or 6 months | R | R | R |
| Oil Filter Element (1)(3)(4) | 4,000 hrs or 6 months | R | R | R |
| Air Filter Element (1)(3)(4) | 4,000 hrs or 6 months | R | R | R |
| Air Filter Clogging Indicator (4) | 4,000 hrs or 6 months | R | R | R |
| Cabinet Suction Filters (1)(4) | 2,000 hrs or 6 months | R | R | R |
| Separator Element (1)(3)(4) | 4,000 hrs or 6 months | R | R | R |
| Separator O-ring/Gasket (4) | 4,000 hrs or 6 months | R | R | R |
| Oil Filling Plug O-ring (4) | 4,000 hrs or 6 months | R | R | R |
| Oil Filter Clogging Sensor (4) | 8,000 hrs or 12 months | R | R | |
| Carbon Graphite Brush — VSD models only (4) | 8,000 hrs or 12 months | R | R | |
| Thermostatic Valve Kit (4) | 16,000 hrs or 24 months | R | ||
| Suction Control Valve Service Kit (4) | 16,000 hrs or 24 months | R | ||
| Minimum Pressure Valve Service Kit (4) | 16,000 hrs or 24 months | R | ||
| Solenoid Valve / Hydraulic & Pneumatic Hoses / Coupling Elastomer / Pressure Transmitter / NTC Sensor / Safety Valve / Airend Sealing Kit (4) | 16,000 hrs or 24 months | R | ||
| Airend General Maintenance (Revision Kit) (4) | 20,000 hrs or 30 months | R | ||
| Electric Motor Bearings (4) | 20,000 hrs or 30 months | R |
STSP2 / STSP2 (VSD) Replacement Schedule
Identical to STSP schedule above with one exception:
| Component | STSP Interval | STSP2 Interval |
|---|---|---|
| Airend General Maintenance (Revision Kit) | 20,000 hrs or 30 months | 32,000 hrs or 48 months |
All other STSP2 intervals match the STSP schedule above.
Ongoing Inspection Tasks — All Models
| Task | Frequency |
|---|---|
| Oil level check | Before every start |
| Separator scavenge line oil flow check | After every start |
| Condensation drain from separator tank | Weekly (after ≥1 day standby) |
| Abnormal vibration / noise check | After every start |
| AirMASTER FORM controller function check | After every start |
| Air filter element cleaning | Every 1,000 hours |
| Air and oil pipe / hose leak check | Every 2,000 hours |
| All electrical wiring inspection | Every 2,000 hours |
| Scavenge line strainer filter cleaning | Every 2,000 hours |
| Cabinet interior cleaning | Every 2,000 hours |
| Electric motor cooling fin cleaning | Every 2,000 hours |
| Coupling elastomer inspection | Every 2,000 hours |
| Fan blade cleaning (axial or radial) | Every 2,000 hours |
| Hydraulic and air hose inspection | Every 2,000 hours |
| Separator tank inspection (corrosion, damage) | Every 2,000 hours |
| Grounding — electrical network | Every 2,000 hours (or after new installation) |
| Grounding — separator tank | Before first start; every 2,000 hours |
| Electric cabinet interior cleaning | Every 2,000 hours |
| Air-oil cooler cleaning | Every 4,000 hours |
| All connection bolt torque check | Every 4,000 hours |
(1) More frequently in dusty/unclean environments | (2) Shorten in dusty/high-humidity/hot conditions | (3) Consumable — not covered by warranty | (4) Whichever threshold comes first
Related Articles
- Oil & Oil Filter Replacement
- Air Filter & Separator Element Replacement
- Electric Motor, Cooler & Safety Valve Maintenance
- Carbon Brush Replacement
- Spare Parts Ordering
For service support or parts, contact South-Tek Systems: (910) 415-1880 or support@southteksystems911.zendesk.com