Kobelco Compact Seal CX-500

Brtve statvene cijevi podmazivane uljem (krmena i pramčana)

The Kobelco Compact Seal CX-500 keeps sea water out of the oil-lubricated stern tube and keeps oil in. The aft seal has Viton lip sealing rings (No.1–No.3) running on a chrome steel liner fixed to the propeller boss; the forward seal has rings No.4 and No.5 with its own oil tank. The finished plan has assembly drawings with parts lists for both seals, the distance ring, tank arrangements, repair rules (liner skimming limits, alignment after refitting) and a daily/weekly inspection table linking each abnormal reading to its likely cause and the action at sea.

Kliknite dio na modelu da vidite njegov broj i namjenu.Otvori 3D priručnik

Postupci održavanja

Seal renewal in dry dock

1. With propeller and shaft withdrawn, detach the seal housings from the hull. str. 29
2. Replace sealing rings; skim the chrome liners if worn, within the D − X limit, otherwise renew the liner. str. 29
3. Use stainless steel bolts for the aft seal when reassembling. str. 29
4. Refit and check alignment with dial indicators: eccentricity 0.2 mm, squareness 0.1 mm per diameter (670 types and below). str. 29

Intervali održavanja

Stavka	Kada	Radnja	Priručnik
Stern tube oil temperature	daily	Over 60 °C: check white metal in strainer, cooler, thermometer; slow down if bearing damage	str. 31
Stern tube oil pressure and tank level	daily	Sudden drop: look for leaks at forward seal or oil outside the ship	str. 31
Aft seal drain	weekly	Check for emulsified oil / seawater and drain it	str. 31
Forward seal tank level and temperature	daily	Sudden rise or drop indicates No.4/No.5 ring damage; refill or recover oil	str. 31
Aft seal tank level	daily	Sudden rise with emulsion means seawater past rings No.1/No.2	str. 31

Kvarovi i što učiniti

Stern tube oil above 60 °CBearing damage, cooler or thermometer faultSudden drop of stern tube oil levelLeak from aft or forward sealEmulsified oil or seawater in drainDamaged No.1/No.2 rings or trapped foreign matterFresh water in drainLeak from aft peak tankForward seal tank level changesNo.4 or No.5 ring damage

Tehničke specifikacije

Seal size	CX-500 (shaft liner 500 mm class)	str. 1
Sealing rings	Viton, aft and forward	str. 2
Liner skimming limit	D − X: X = 3.4 mm for size 500 (e.g. 600 type: 3.7 mm)	str. 29
Alignment after refitting (≤670 types)	eccentricity 0.2 mm/dia, squareness 0.1 mm/dia	str. 29
Stern tube oil temperature alarm	over 60 °C	str. 31
Oil pressure margin for seawater ingress	raise 0.3–0.5 kgf/cm² above normal	str. 31

Izvor: priručnik proizvođača „EM-35 KOBELCO COMPACT SEAL-STERNTUBE SEALING”, 47 str. Brojevi stranica odnose se na izvornik. Prije rada provjerite priručnik na brodu.

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