{"id":867,"date":"2026-01-10T10:07:38","date_gmt":"2026-01-10T10:07:38","guid":{"rendered":"https:\/\/fild.rs\/?p=867"},"modified":"2026-02-03T10:09:03","modified_gmt":"2026-02-03T10:09:03","slug":"kavitacija-u-hidraulici-nadgradnje-simptomi-uzroci-i-resenja","status":"publish","type":"post","link":"https:\/\/fild.rs\/en\/kavitacija-u-hidraulici-nadgradnje-simptomi-uzroci-i-resenja\/","title":{"rendered":"Kavitacija u hidraulici nadgradnje: simptomi, uzroci i re\u0161enja"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Ako ti se hidraulika nadgradnje odjednom \u010duje kao da melje kamen (a ne podi\u017ee sanduk), vrlo je mogu\u0107e da je u pitanju kavitacija u hidraulici. To je onaj momenat kad pumpa <\/span><i><span style=\"font-weight: 400;\">ho\u0107e ulje<\/span><\/i><span style=\"font-weight: 400;\">, a dobije \u201cprazan hod\u201d i mehuri\u0107e koji pucaju pod pritiskom \u2013 i onda metal dobije mikro-\u0161amar\u010di\u0107e dok ne ka\u017ee \u201edosta\u201c. Taj proces mo\u017ee da izazove piting\/eroziju na komponentama i da ubrza kvarove.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">U nastavku: kako je prepozna\u0161, za\u0161to se pojavljuje i \u0161ta da uradi\u0161 da ne plati\u0161 popravku \u201eu ratama i suzama\u201c.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">\u0160ta je kavitacija u hidraulici (bez filozofije)<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Kavitacija nastaje kad pritisak na usisu (na strani gde pumpa \u201cvu\u010de\u201d ulje) padne dovoljno da se formiraju mehuri\u0107i pare\/gasa. Kad mehuri\u0107i u\u0111u u zonu vi\u0161eg pritiska, <\/span><b>kolabiraju<\/b><span style=\"font-weight: 400;\"> i prave udarne talase \u2013 dovoljno \u201cslatko\u201d da vremenom o\u0161teti povr\u0161ine u pumpi i ventilima.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Naj\u010de\u0161\u0107e se javlja na nadgradnjama koje rade u te\u0161kim uslovima: kiperi (\u010desto start\/stop), podiza\u010di kontejnera, dizalice, komunalne nadgradnje zimi, itd.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Simptomi: kako da je prepozna\u0161 pre nego \u0161to bude kasno<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Obrati pa\u017enju na ove znake (kavitacija retko dolazi tiho, na\u017ealost):<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Zvi\u017edanje, cviljenje, \u201ekr\u010dkanje\u201c ili pucketanje<\/b><span style=\"font-weight: 400;\"> iz pumpe\/razvodnika, posebno pod optere\u0107enjem.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Trzanje, neujedna\u010den rad, sporije podizanje<\/b><span style=\"font-weight: 400;\"> (kao da sistem \u201cgubi dah\u201d).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Pove\u0107ano grejanje ulja<\/b><span style=\"font-weight: 400;\"> i ose\u0107aj da je sve nekako \u201etvrdo\u201c ili previ\u0161e bu\u010dno.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Pena u rezervoaru<\/b><span style=\"font-weight: 400;\"> ili mle\u010dni izgled ulja (\u010desto ide ruku pod ruku sa uvla\u010denjem vazduha).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><b>Vibracije<\/b><span style=\"font-weight: 400;\"> koje ranije nisu postojale.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Ako ti se problem javlja ba\u0161 kad zahladi, baci pogled i na FILD vodi\u010d za hladni start i rutinu:<\/span><a href=\"https:\/\/fild.rs\/en\/zimski-rezim-kipera-zastita-od-korozije-odvod-vode-i-hladni-start-hidraulike\/\"> <span style=\"font-weight: 400;\">Zimski re\u017eim kipera: za\u0161tita od korozije, odvod vode i \u201chladni start\u201d hidraulike<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Naj\u010de\u0161\u0107i uzroci kavitacije na nadgradnjama<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Evo \u201ctop liste krivaca\u201d u realnom \u017eivotu:<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">1) Nizak nivo ulja u rezervoaru<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Kad nema dovoljno ulja, pumpa povu\u010de vazduh i dobije\u0161 kombinaciju kavitacije + aeracije (dupli problem, duplo nerviranje).<\/span><\/p>\n<p><b>Brza provera:<\/b><span style=\"font-weight: 400;\"> nivo na merilu pre starta i posle rada (nekad \u201cpobegne\u201d zbog curenja ili lo\u0161eg odzra\u010divanja).<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">2) Zapu\u0161en usisni filter ili preusko usisno crevo<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Pumpa poku\u0161ava da vu\u010de, ali ne mo\u017ee da se \u201cnapuni\u201d \u2013 na usisu padne pritisak i eto mehuri\u0107a. Ovo je klasik, posebno ako se servis preska\u010de \u201cjer radi jo\u0161\u201d.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">3) Fals vazduh na usisu (labave \u0161elne, mikro-pukotine, lo\u0161i dihtunzi)<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">I mala poroznost na usisnoj strani pravi haos, jer tu pumpa pravi podpritisak i vazduh ulazi lak\u0161e nego \u0161to misli\u0161.<\/span><\/p>\n<p><b>Tipi\u010dan trag:<\/b><span style=\"font-weight: 400;\"> pena u ulju i kavitacija koja se poja\u010da kad da\u0161 gas \/ pove\u0107a\u0161 obrtaje.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">4) Pregusto ulje (hladan start) ili pogre\u0161na viskoznost<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Zimi ulje postane gu\u0161\u0107e, pumpa te\u017ee vu\u010de, a usis \u201cgladuje\u201d. Zato zimska rutina i izbor ulja nisu marketing \u2013 to je pre\u017eivljavanje sistema.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">5) Previsoki obrtaji pumpe \/ lo\u0161e uparen PTO\u2013pumpa<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Ako je pumpa \u201cprebrza\u201d za usisnu instalaciju, ona ne\u0107e sti\u0107i da se napuni. Ako \u017eeli\u0161 \u0161iru sliku oko uparivanja komponenti (PTO, pumpa, rezervoar, razvodnici), koristan je tekst:<\/span><a href=\"https:\/\/fild.rs\/en\/hidraulika-kipera-pto-pumpa-rezervoar-i-razvodnici\/\"> <span style=\"font-weight: 400;\">Hidraulika kipera \u2013 PTO, pumpa, rezervoar i razvodnici<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Re\u0161enja: \u0161ta konkretno da uradi\u0161 (redosled koji \u0161tedi \u017eivce)<\/span><\/h2>\n<h3><span style=\"font-weight: 400;\">Korak 1: Zaustavi \u201cmu\u010denje\u201d i uradi osnovne provere<\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Proveri <\/span><b>nivo ulja<\/b><span style=\"font-weight: 400;\"> i vidljive <\/span><b>tragove curenja<\/b><span style=\"font-weight: 400;\">.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Pogledaj ulje: da li je <\/span><b>penasto\/mle\u010dno<\/b><span style=\"font-weight: 400;\">?<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Poslu\u0161aj: da li se zvuk menja sa obrtajima?<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">Korak 2: Usis je svetinja (tu se dobija ili gubi bitka)<\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Zategni \u0161elne, proveri spojeve, zameni sumnjive dihtunge.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Proveri\/usisni filter: o\u010disti ili zameni (po preporuci).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ako ima\u0161 mogu\u0107nost: proveri da li je usisna linija <\/span><b>preuska<\/b><span style=\"font-weight: 400;\"> ili sa previ\u0161e kolena (svako koleno je mini-kazna za protok).<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">Korak 3: Re\u0161i hladan start (posebno na komunalnim vozilima)<\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Pusti sistem da radi par minuta bez optere\u0107enja.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ne \u201c\u0161ibaj\u201d odmah pun gas i pun teret. Hidraulika nije espresso aparat.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Za komunalce i zimsku pripremu, zgodan je i ovaj tekst:<\/span><a href=\"https:\/\/fild.rs\/en\/zimski-paket-za-komunalce-ralice-posipaci-i-priprema-hidraulike\/\"> <span style=\"font-weight: 400;\">Zimski paket za komunalce: ralice, posipa\u010di i priprema hidraulike<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Korak 4: Dimenzionisanje i kvalitet komponenti (kad ho\u0107e\u0161 re\u0161enje, ne flaster)<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Ako ti se kavitacija ponavlja, \u010desto problem nije \u201cjedan filter\u201d, nego kompletna kombinacija: pogon\u2013pumpa\u2013rezervoar\u2013hla\u0111enje\u2013ventili.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Za pouzdane kip sisteme, pogledaj<\/span><a href=\"https:\/\/fild.rs\/en\/proizvodi\/oprema\/kip-uredjaji-hyva\/\"> <span style=\"font-weight: 400;\">Kip ure\u0111aje HYVA<\/span><\/a><span style=\"font-weight: 400;\"> (cilindri\/ventili\/komande u jednom proverenom ekosistemu).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ako ti treba kompaktan i uredan paket za pogon (posebno kad ima vi\u0161e potro\u0161a\u010da),<\/span><a href=\"https:\/\/fild.rs\/en\/proizvodi\/oprema\/hydrive-hidraulika\/\"> <span style=\"font-weight: 400;\">Hydrive hydraulics<\/span><\/a><span style=\"font-weight: 400;\"> integri\u0161e <\/span><b>rezervoar, hladnjak ulja i sigurnosni ventil<\/b><span style=\"font-weight: 400;\"> u jednom ku\u0107i\u0161tu, \u0161to poma\u017ee stabilnosti i disciplini sistema.\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u0160iru ponudu dodatne opreme mo\u017ee\u0161 prelistati ovde:<\/span><a href=\"https:\/\/fild.rs\/en\/proizvodi\/oprema\/\"> <span style=\"font-weight: 400;\">FILD oprema<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/li>\n<\/ul>\n<h3><span style=\"font-weight: 400;\">Korak 5: Uvedi preventivu (jeftinije od \u201cposle\u201d)<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Najlak\u0161a kavitacija za re\u0161avanje je ona koja se nikad ne desi:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Redovna kontrola nivoa i kvaliteta ulja<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Servis po sezoni (zatezanje, pregled creva, proveravanje spojeva)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Plan zamene filtera i vizuelni pregled instalacije<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Za dobar raspored pregleda tokom godine:<\/span><a href=\"https:\/\/fild.rs\/en\/servis-nadgradnji-po-sezonama\/\"> <span style=\"font-weight: 400;\">Servis nadgradnji po sezonama<\/span><\/a><span style=\"font-weight: 400;\">. (<\/span><a href=\"https:\/\/fild.rs\/en\/servis-nadgradnji-po-sezonama\/?utm_source=chatgpt.com\"><span style=\"font-weight: 400;\">FILD<\/span><\/a><span style=\"font-weight: 400;\">)<\/span><\/p>\n<h2><span style=\"font-weight: 400;\">Najkra\u0107i \u201ccheat sheet\u201d za teren<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Ako nema\u0161 vremena, kreni ovim redom:<\/span><\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Nivo ulja + stanje ulja (pena?)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Usisni spojevi (fals vazduh)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Usisni filter \/ restrikcije<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Hladan start i viskoznost<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Uparivanje PTO\u2013pumpa i dimenzionisanje<\/span><\/li>\n<\/ol>\n<h2><span style=\"font-weight: 400;\">Zaklju\u010dak<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Kavitacija je kao zubobolja: mo\u017ee\u0161 da je ignori\u0161e\u0161 neko vreme, ali ona ne ignori\u0161e tebe. Kad uhvati\u0161 problem na vreme (usis, nivo, filteri, hladan start), sistem se smiri, a pumpa prestane da \u201cpeva\u201d tu\u017enu pesmu.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ako \u017eeli\u0161 da proveri\u0161 opcije opreme ili da krene\u0161 od po\u010detka, svrati na<\/span><a href=\"https:\/\/fild.rs\/en\/\"> <span style=\"font-weight: 400;\">FILD po\u010detnu stranu<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Ako ti se hidraulika nadgradnje odjednom \u010duje kao da melje kamen (a ne podi\u017ee sanduk), vrlo je mogu\u0107e da je u pitanju kavitacija u hidraulici. To je onaj momenat kad pumpa ho\u0107e ulje, a dobije \u201cprazan hod\u201d i mehuri\u0107e koji pucaju pod pritiskom \u2013 i onda metal dobije mikro-\u0161amar\u010di\u0107e dok ne ka\u017ee \u201edosta\u201c. Taj proces [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":595,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-867","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Kavitacija u hidraulici nadgradnje: simptomi, uzroci i re\u0161enja - FILD<\/title>\n<meta name=\"description\" content=\"Simptomi i uzroci kavitacije u nadgradnji, plus re\u0161enja i prevencija. 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