Crane Pulley block ndi imodzi mwazinthu zazikulu zonyamula makina makina, makamaka opangidwa, bulangwe, bulangwe la waya ndi mafuta opangira mafuta. Ntchito yake yolumikizana ndikusintha njira ya waya kuti ikwaniritse kupulumutsa kapena kuthamanga kukuwonjezeka, potero kukonza katundu ndi luso la crane. Ma pulleys nthawi zambiri amapangidwa ndi zitsulo zapamwamba kapena ziwonetsero za nayiloni kuzolowera malo ogwirira ntchito ndi zofunikira.
Mabatani a crane amatha kugawidwa m'makoka okhazikika (okhazikika, akungosintha njira yoyendetsera mphamvu) ndi kutukuka ndi katundu, omwe amatha kupulumutsa khama). Malinga ndi nkhani yogwiritsira ntchito, imatha kugawidwanso m'magudukidwe amodzi, magudumu owirikiza kawiri, monga mabatani oyenda, pomwe madokotala amagwiritsa ntchito mabatani ambiri okwanira kuti achepetse zingwe.
Kuonetsetsa kuti kuchuluka kwa kuchuluka kwa pulley, ndikofunikira kuyang'ana nthawi zonse pupule ya tchire, yonyamula mafuta ndi chingwe chofananira. Ngati ming'alu, kuwonongeka kapena phokoso lachilendo kumapezeka mu pulley, makinawo amayenera kuyimitsidwa poyeserera nthawi yomweyo. Nthawi yomweyo, ma pulley omwe amafanana ndi kutalika kwa waya uyenera kusankhidwa kuti apewe kuvala chifukwa chochepa kwambiri kapena chokulirapo. Kuphatikiza apo, mapangidwe ndi kukhazikitsa kwa kalozera wa pulley ayenera kutsatira miyezo yadziko monga "crane kapangidwe kake" (GB T 3811) Kuti muwonetsetse chitetezo ndi kudalirika.
