RE12820 ndi chosinthira makina opopera a JD omwe amagwiritsidwa ntchito popanga zida zamakina a ulimi ndipo amaikidwa m'gulu la zowonjezera za injini.
Ma Model Ogwirizana: Yoyenera JDe 7500 ndi mitundu ina yogwirizana.
Ntchito: Pulley iyi, yomwe imayikidwa kutsogolo kwa crankshaft ya injini, imakhala ndi choyatsira chamkati chomwe nthawi zambiri chimapangidwa ndi rabara kapena zinthu zina zofanana zochepetsera kutentha. Imayamwa kugwedezeka kwa torsional komwe kumachitika panthawi yogwira ntchito ya crankshaft, imachepetsa kugwedezeka kwamphamvu komwe kumachitika chifukwa cha ntchito ya injini, motero imachepetsa phokoso, imachepetsa kugwedezeka kwa injini ndi zigawo zina, imawonjezera kusalala ndi kudalirika kwa injini, ndikuwonjezera moyo wautumiki wa ziwalo zina zokhudzana nazo.
Zinthu Zamkati: Mapangidwe ofala ndi monga ma pulley oletsa mafuta a silicone ndi ma pulley oletsa mafuta a rabara. Ma pulley a rabara amakhala ndi kapangidwe kosavuta, zovuta zochepa zopangira, komanso kugwiritsidwa ntchito kwakukulu. Nthawi zambiri, pulley yokhazikika yachitsulo chonse imasinthidwa podula pakati pake m'magawo amkati ndi akunja. Kenako rabara imadzazidwa m'malo olakwika pakati pa magawo awa. Mphamvu ya injini imatumizidwa kudzera mu mphete yamkati, gawo la rabala loletsa kutentha, ndipo pomaliza pake ku mphete yakunja, zomwe zimapangitsa kuti kugwedezeka kuchepe.
