Izingxenye zeTrailer zithengisa amakhava e-trailer anensimbi eyinsimbi ahloselwe ukuhlangabezana nezinhlelo ezihlukahlukene. Amakhava anomklamo "okufakwa" ukuze kube lula ukufaka. Ukwakhiwa kwensimbi eqinile ukuze kuqinisekiswe ukuqina okuphakeme. Amakhava e-grease anama-plug aphumayo enziwe ngengubo ye-rubber angasetshenziswa namahhubhu noma ama-spindle anokufakwa kwe-grease zerk. Amakhava e-Oil e-Clear PVC eza ne-O-ring ye-rubber kanye ne-plug yokugcwalisa ephumayo.