Answer
A cikin babban taro mai sarrafa kansa mai girma, ƙalubalen farko shine 'ƙasa' ko 'tangling' na maɓuɓɓugan ruwa a cikin masu ciyar da girgiza. Maɓuɓɓugan igiyar ruwa, musamman waɗanda ke da buɗaɗɗen ƙarewa, na iya shiga tsakani, wanda ke haifar da raguwar lokacin injin. Yin amfani da ƙarshen 'shim ends' ko 'squared-flat' yana taimakawa rage wannan. Bugu da ƙari, dole ne a ƙirƙira kayan aikin taro (plunger) don yin amfani da nauyin axial iri ɗaya yayin sakawa don guje wa karkatar da bazara. Idan ruwan bazara ya karkata, zai iya kama gefen ramin, yana haifar da 'burr' ko lalata rufin bazara. Ana ba da shawarar saka idanu na tilasta matsuguni yayin aikin damfara; kwatsam kwatsam cikin ƙarfi kafin isa tsayin ƙira $H_1$ yana nuna rashin daidaituwa ko taron bazara na 'ninki biyu'.
