(1) Haɗin haɗin gear ya yi girma ko ƙanƙanta.
(2) Tsakanin nisa tsakanin babban ramin crankshaft da ramin camshaft yana canzawa yayin amfani ko gyara, zama babba ko ƙarami; layukan cibiyar crankshaft da camshaft ba daidai ba ne, wanda ke haifar da lalata kayan aiki mara kyau.
(3) Rashin ingantaccen bayanin martabar haƙori na gear, nakasar lokacin jiyya mai zafi ko lalacewa mai yawa akan saman haƙori;
(4) Jujjuyawar Gear--Ratar da ke tsakanin gibin gnawing a cikin kewaye ba daidai ba ne ko abin da aka yanke ya faru;
(5) Akwai tabo, lalata ko karyewar hakora a saman haƙorin;
(6) Kayan yana kwance ko daga cikin crankshaft ko camshaft;
(7) Gear karshen fuska madauwari runout ko radial runout ya yi girma;
(8) Ƙaƙwalwar axial na crankshaft ko camshaft ya yi girma;
(9) Ba a musanya gears biyu-biyu.
(10) Bayan maye gurbin crankshaft da camshaft bushes, an canza matsayin meshing gear.
(11) The camshaft timing gear fixing goro is sako-sako da.
(12) Haƙoran kayan aikin camshaft sun karye, ko kayan sun karye a cikin radial direction.