Southern Cross Centurion Pumps
Spare Parts for Southern Cross Centurion Split-Case Pumps
Product Summary
Genuine OEM spare parts for the Southern Cross Centurion single-stage, double-suction split-case pump, used across Australia for irrigation, municipal water supply, fire protection, dewatering and industrial water transfer. The top casing lifts off without disturbing the pipework, so tick the parts you need and we’ll match them to your nameplate, such as SS125-380H.
Spare Parts List
✓ Tick the parts you need. Southern Cross Centurion parts are matched to the pump size, impeller diameter, seal arrangement (mechanical seal or packed gland) and bearing option, so the size and serial number on your nameplate are all we need to get them right. Not sure which items? Add a photo of the nameplate and we’ll work it out for you.
| Select | Wear / Service Item | Function & when to replace |
|---|---|---|
| Common Service Kits | ||
| Bearing & Gasket Kit | The set Southern Cross recommends holding for start-up and routine maintenance. Fit at a scheduled overhaul or whenever the bearings run hot, rough or noisy and the pump is opened up. | |
| Mechanical Seal (item 14) | Seals the shaft at each side of the casing (two per pump). Replace at the first sign of leakage, after any dry run, or when the faces are worn or chipped at an overhaul. | |
| Wear Ring (item 5) | Casing rings that limit leakage from the discharge side back to suction. As they wear the gap opens and output drops, so replace them to bring efficiency back. | |
| Impeller (item 4) | The balanced double-suction impeller. Replace if it is eroded, cracked or clogged beyond cleaning; it is matched to the impeller diameter on your nameplate. | |
| Shaft Sleeves (item 13) | Stainless steel sleeves that keep the pumped water off the shaft. Replace if grooved or worn under the packing or seal, as a worn sleeve causes leakage at the stuffing box. | |
| Wear & Consumable Parts | ||
| Ball Bearing – Drive End (item 8) | Carries the shaft at the coupling end; double-row or oil-lubricated options are fitted on some pumps. Replace if it runs hot, rough or noisy, or shows wear or corrosion at overhaul. | |
| Ball Bearing – Non-Drive End (item 10) | Supports the free end of the shaft. Replace if it runs hot or noisy, has been under- or over-greased, or is dirty or rusty, and renew the circlip (item 11) as needed. | |
| Shaft & Sleeve O-ring (item 20) | Seals between the shaft sleeve and shaft so water cannot track along the shaft. Renew whenever the sleeves or seals are disturbed. | |
| Impeller & Sleeve O-ring (item 24) | Seals the joint between the impeller hub and the shaft sleeve. Fit new ones every time the impeller or sleeves are removed. | |
| Seal Plate & Seal Chamber O-rings (items 22, 23) | Static O-rings that seal the seal plate and seal chamber to the casing. Renew whenever the mechanical seals are changed or the seal housings are taken off. | |
| Lantern Ring (item 30) | Spacer in the stuffing box that lets the flush water reach the packing. Replace if damaged, and make sure it lines up under the sealing liquid inlet when repacking. | |
| Felt Ring (item 25) | Keeps dirt and moisture out of the bearing housing and holds the grease in. Renew at every bearing change. | |
| Other Core Parts | ||
| Shaft (item 3) | The stainless steel pump shaft, one of the maintenance spares Southern Cross recommends holding. Replace if bent, running untrue, or damaged at the bearing, sleeve or keyway fits. | |
| Casing Top (item 2) | The removable top half of the split casing that gives access to the rotating parts. Replace if it is cracked, corroded or eroded; it is matched to the lower casing (item 1). | |
| Bearing Housings (items 6, 9) | Hold the ball bearings in line with the casing. Replace if a bearing seat is worn or damaged, or the housing is cracked; the drive-end cover (item 7) is available too. | |
| Seal Plate with Plan 11 Flushing (item 15) | Houses the mechanical seal and feeds it flush water from the casing. Replace if the seal seat or flush port is worn or damaged; the Plan 01 seal chamber (item 17) is also listed. | |
| Coupling Pin and Bushing (item 21) | The flexible pins and bushings that drive the coupling hub (item 18). Replace when the bushings are worn, cracked or hardened, which shows up as noise and vibration. | |
| Gland (item 31) | Compresses the packing in the stuffing box. Replace if cracked or distorted; a gland pulled up too hard or on a slant makes the box leak and run hot. | |
How we confirm the exact part: Southern Cross Centurion parts depend on the pump size, impeller diameter, seal arrangement (mechanical seal or packed gland), bearing option and casing material fitted to your pump. The item numbers shown are as printed on the cross-section and parts table in the Southern Cross Centurion owners manual; your nameplate carries the pump size (e.g. SS125-380H), the impeller diameter and the serial number, which together pin down the build. Tick the items above and add a nameplate photo, and we’ll confirm the correct parts for your exact pump.
Models
Centurion pumps are sized by series, discharge flange and nominal maximum impeller diameter, shown as the pump size on your nameplate (e.g. SS 125-380H: 125 mm discharge, 380 mm impeller). Southern Cross lists 43 sizes from 80 to 400 mm discharge but does not publish the individual sizes, so the builds below are the ones the manual describes.
Models & Key Specifications
| Item | Centurion range | Source |
|---|---|---|
| Design | Single stage, double suction, split case; horizontal or vertical | Owners manual |
| Sizes | 43 models, 80–400 mm discharge | Technical data sheet |
| Flow / head | Up to 4000 m³/h; up to 160 m | Technical data sheet |
| Speeds | 1450 and 2900 rpm curves | Technical data sheet |
| Casing design pressure | 1.6 MPa and 2.5 MPa | Owners manual |
| Liquid temperature | Up to 130°C (with optional bearing cooling) | Owners manual, data sheet |
| Shaft / sleeves / wear rings | 420 stainless shaft; 316 stainless sleeves and wear rings | Technical data sheet |
| Shaft seal | Unbalanced mechanical seal (SiC v SiC) standard; balanced, cartridge or packed gland options | Owners manual, data sheet |
| Bearings | Deep groove, grease-lubricated ball bearings; oil-lubricated or double-row drive end options | Owners manual |
From the Southern Cross Centurion owners manual and technical data sheet (Pentair). Vertical pumps use a product-lubricated bush bearing at the non-drive end, which is not on the horizontal parts table. Flow and head for your pump depend on the size, impeller diameter and speed on your nameplate.
Troubleshooting
Pump does not deliver
Likely cause: a choked suction or foot valve, air leaking in through the suction line or stuffing box, the pump not vented, wrong rotation, or a clogged impeller. Action: clear and seal the suction line, vent and re-prime the pump, check rotation, and clean the impeller (item 4).
Pump delivers at reduced capacity
Likely cause: worn casing rings, a damaged impeller, air getting into the suction, or the speed too low. Action: check the suction side first; if output is still down, replace the wear rings (item 5) and the impeller (item 4) if it is damaged.
Stuffing box leaks excessively
Likely cause: packing fitted wrongly or unsuitable for the duty, a gland pulled up too hard or on a slant, a worn shaft sleeve, or a shaft running untrue. Action: repack with the right packing and the lantern ring (item 30) under the flush inlet, set the gland (item 31) evenly, and replace worn shaft sleeves (item 13).
Bearing temperature increases
Likely cause: too little or too much grease, the wrong grease, coupling misalignment, or extra end thrust from worn casing rings. Action: regrease to the manual’s schedule with EP lithium grease, check coupling alignment, and replace the bearings (items 8, 10) and worn wear rings.
Pump is very noisy or runs unsteadily
Likely cause: poor suction conditions (cavitation), worn bearings, a misaligned coupling or worn coupling element, a bent shaft, or out-of-balance rotating parts. Action: check suction conditions and coupling alignment, renew the coupling pins and bushings (item 21) and bearings, and check the shaft (item 3) for run-out.
Motor gets hot or burns out
Likely cause: flow too high for the motor, a gland that is too tight, misalignment, rotating parts touching the casing, or liquid that is too viscous. Action: throttle the discharge to the duty point, ease the gland, check alignment and rotor clearances, and check the motor supply.
Request for Quotation
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Not sure which parts? Just send a photo of the nameplate or part below.