Ingersoll Rand T-30 Two-Stage (2475 / 2545)
Two-stage cast-iron reciprocating pumps built on the T-30 pump platform. Belt-driven, air-cooled, splash- or pressure-lubricated depending on frame.
- Start/Stop (pressure switch)
- Continuous Run w/ Unloader (constant-speed unloader kit)
- Auto shops
- Farms
- Small manufacturing
- Backup air
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.
- ISO 100 non-detergent mineral (cold-only or short-interval)
- Full-synthetic PAO for high-duty
Head bolts: 55–65 ft-lb cross pattern on 2475; verify per OEM sheet. Flywheel: 65–75 ft-lb. Belt tension: ½" deflection at midspan.
Always verify torque values against the OEM service manual for the specific serial number.
| Category | Interval | Source |
|---|---|---|
| Inlet filter element | 500 hr or annually | |
| Reed/disc valve set | Inspect at 2,000 hr, replace at wear | |
| V-belt set | Annually inspect, replace at cracking | |
| Pressure switch / unloader | As needed | |
| Piston rings (top-end) | 4,000–6,000 hr | |
| Head gasket set | With each head service | |
| Check valve (tank) | Inspect at each PM; replace at leak-back | |
| Safety valve | Test annually; replace at any weep |
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.
- 375P— Solberg
- P776386— Donaldson
- AX48— Gates
- AX48— Goodyear
- AX48— GatesLikelysourceConfirm center-distance; some frames use BX or 3VX.
- AX48— GoodyearLikely
- Rarus 427— Mobil
- PCK— Amsoil
- Rarus 427— MobilUnverifiedMineral 100 SUS; OK for cool climates only.
- PCK— AmsoilUnverifiedFully synthetic recip fluid.
Need to look up a number across all models? Use the parts cross-reference search.
- Check crankcase oil level
- Drain tank moisture
- Listen for valve tick / knock
- Verify unloader operates on cut-out
- Change crankcase oil (mineral) or verify PAO/synthetic at manufacturer interval
- Clean or replace inlet filter
- Check belt tension & sheave alignment
- Torque head bolts to spec if any weeping
- Pull head; inspect reed/disc valves and seats
- Check ring gap and cylinder wear
- Torque head bolts to OEM spec in cross pattern
- Test safety valve
- Inspect crankshaft & rod bearings on splash-lube units
- Top-end rebuild (rings, valves, gaskets)
- Inspect rod bearings and crank end play
- Verify aftercooler condensate drain
- Won't build past 100 psi — worn valves or blown head gasket
- Excessive oil consumption — worn rings or over-full crankcase
- Belt squeal on cold start — normal for 30 s; if persistent, tension or replace
- Motor thermal trip on hot restart — undersized starter or high ambient
- 2475 splash-lube crankcase venting can pull oil past rings when badly overfilled — hold to sight glass midpoint
- Aftermarket knock-off valves cause premature interstage moisture — use OEM valves
- Legendary durability (many 30+ year units in service)
- Simple field service
- Parts widely stocked
- High duty cycle (75%+)
- Loud without enclosure
- Requires physical PM cadence (no controller)
- No integrated aftercooler on base package
The T-30 platform is one of the most-common shop compressors in North America. 2475 = 5–7.5 hp splash-lubricated; 2545 = 10–15 hp pressure-lubricated with oil pump.