Grundfos S Range Pumps
Spare Parts for S Range Pumps
Product Summary
Genuine and compatible spare parts for the Grundfos S large submersible sewage pump, the backbone of many Australian council sewage pump stations, treatment plant inlet works, stormwater and industrial effluent duties. Every S pump in ranges 62, 66 and 70 (15 to 155 kW) shares the same service build (1-, 2- or 3-channel impeller, double shaft seal, heavy-duty bearings and sensor-protected motor), so tick what you need and we’ll match the exact kit to your nameplate (e.g. S2.100.200.550.4.66M.C).
Spare Parts List
✓ Tick the parts you need. Grundfos S pump service kits are matched to the hydraulic size, motor and build, so your nameplate model is all we need to get them right. Not sure which items? Add a photo of the nameplate and we’ll work out the kit for you.
| Select | Wear / Service Item | Function & when to replace |
|---|---|---|
| Common Service Kits | ||
| Shaft Seal Kit | The primary and secondary mechanical shaft seals with their O-rings and fitting parts, matched to your range. Replace at the first moisture alarm or if water shows in the seal chamber oil. | |
| Bearing Kit | Main and support bearings with their seals and circlips, matched to your range and motor. Fit at a major overhaul or when the bearings run noisy or hot. | |
| Impeller | The channel impeller for your exact hydraulic, trimmed to the impeller diameter on the nameplate (e.g. .66M.C.338). Replace if worn, cracked or eroded. | |
| Wear Ring / SmartTrim Kit | The wear ring and SmartTrim clearance parts on the suction side. Reset the clearance as it opens up; replace the wear parts when it can no longer be reset. | |
| O-ring & Gasket Kit | O-rings and gaskets for the pump housing, seal chamber and motor covers. Renew whenever the pump is opened. | |
| Cable Entry & Cable Kit | Replacement power and sensor cable (15 m standard; other lengths and screened cable to order) with the cable entry, clamp and rubber seals. Fit if the cable is damaged or wicking water. | |
| Other Core Parts | ||
| Sensor Kit | Moisture switch and PTC thermistors (standard), plus optional thermal switches, Pt100 sensors, vibration sensor and water-in-oil (WIO) sensor. Replace a failed sensor so the pump stays protected. | |
| Smart Seal Auto-Coupling Gasket | The Smart Seal gasket that makes a leak-free joint between the pump and the auto-coupling base. Replace if leaking or damaged. | |
| Auto-Coupling & Guide Rail Fittings | Auto-coupling base, guide claw and rail brackets for your discharge size, plus adaptors to fit current S pumps to pre-2009 S-pump auto-couplings. | |
| Cooling Jacket Parts | Cooling jacket and seals for C, D and H installation types. Replace if damaged or leaking; a blocked jacket leads to overheating. | |
| Lifting Chain | Lifting chain and shackles rated for the pump weight. Always lift by the chain, never the cable. | |
| Protection Module | The IO 113 module or PTC relay that reads the pump’s thermistors and moisture switch and stops the pump on a fault. | |
| Motor / Stator Service | Stator rewind, rotor and motor parts matched to your kW, poles and voltage code. | |
| Complete Replacement Pump | When a rebuild doesn’t stack up, we quote a like-for-like S pump from the model on your nameplate. | |
How we confirm the exact part: Grundfos S-pump kits depend on the range, impeller type and diameter, and motor. The model reads impeller channels, free passage (mm), discharge (DN), kW × 10, poles, range and pressure version, installation type and impeller diameter, e.g. S2.100.200.550.4.66M.C.338 = 2-channel, 100 mm solids, DN200, 55 kW, 4-pole, range 66, cooling jacket, 338 mm impeller. Tick the items above and add a nameplate photo, and we’ll confirm the correct part and price for your exact pump.
Models
Spare parts are available for every S-pump family in the current Grundfos Australia range (ranges 62, 66 and 70), and for older and pre-2009 S pumps from the nameplate. The two digits before the pressure letter are the range (e.g. .66M), and S1, S2 or S3 is the number of impeller channels.
Models & Key Specifications
| Range / impeller | Motor (kW) | Poles | Discharge | Free passage |
|---|---|---|---|---|
| Range 62 · S1 | 30–50 | 4 | DN125 | 80–100 mm |
| Range 62 · S2 | 20–50 | 4 / 8 | DN200–DN300 | 100–145 mm |
| Range 62 · S3 | 15 | 12 | DN300 | 120 mm |
| Range 66 · S1 | 68 | 4 | DN200 | 80 mm |
| Range 66 · S2 | 35–68 | 4 / 8 | DN200–DN300 | 100–140 mm |
| Range 66 · S3 | 22–50 | 8 / 10 | DN300–DN600 | 110–120 mm |
| Range 70 · S1 | 85 | 4 | DN200 | 80 mm |
| Range 70 · S2 | 65–155 | 4 / 6 / 8 | DN200–DN250 | 90–120 mm |
| Range 70 · S3 | 65–130 | 6 / 8 | DN300–DN600 | 110–120 mm |
All sizes: liquid temperature 0 °C to +40 °C, pH 6–12, 3 × 415 V star-delta, 50 Hz, moisture switch and PTC thermistors (Pt100, thermal switches, vibration and WIO sensors optional), 15 m cable, cast iron housing and impeller, explosion-proof on request. Installation: S submerged, C submerged with cooling jacket, D dry vertical, H dry horizontal.
Troubleshooting
Pump blocked or ragging
Likely cause: rags and wipes caught on the impeller vanes, or an opened-up clearance between the impeller and the wear ring. Action: isolate the power, lift the pump and clear the impeller; reset the clearance with SmartTrim and replace the wear parts if it can no longer be reset.
Moisture alarm or leaking at the shaft seal
Likely cause: worn seal faces letting water into the oil chamber, often from grit, dry running or age; the moisture switch trips the pump before the motor floods. Action: check the oil in the seal chamber: water or emulsified oil means the seal has failed. Fit the shaft seal kit, renew the O-rings and refill with fresh oil. Don’t reset and run on a moisture alarm.
Thermal trip or overheating
Likely cause: an overload from a blocked or worn impeller, a phase fault, too many starts per hour, a dry-installed pump with a blocked cooling jacket. Action: check the voltage on all phases and the motor current against the nameplate; clear the hydraulic end; check level settings so the pump stays submerged or, on dry installs, that the cooling jacket is clear. Repeated trips need a motor inspection.
Low flow or head
Likely cause: wrong rotation, air trapped in the pump, a partly blocked discharge or non-return valve, or wear at the impeller and wear ring. Action: check rotation on three-phase pumps; vent the pump and clear the discharge, valve and auto-coupling; if output still falls short, replace the worn hydraulic parts.
Noise or vibration
Likely cause: solids caught in the impeller, a damaged impeller, worn motor bearings, or the pump not seated properly on the auto-coupling. Action: clear and inspect the impeller; check that the pump sits fully on the auto-coupling base and the guide rails are straight; worn bearings need a motor overhaul.
Pump will not start
Likely cause: no supply, a tripped motor protection, a failed level switch, or a seized pump. Action: check the supply, controller and level switches and reset the protection; with the power isolated, check the impeller turns freely. A seized pump needs inspection of the hydraulic end and bearings.
Damaged cable or water in the cable entry
Likely cause: a cut, crushed or chafed cable from lifting or debris, or a perished cable entry seal. Action: isolate the pump and test the insulation resistance; never splice a submersible cable in the well. Replace the cable kit and cable entry seal, and lift the pump by its chain, never the cable.
Request for Quotation
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Not sure which parts? Just send a photo of the nameplate or part below.