Dhul-biyoodyada kufsada ayaa door muhiim ah ka ciyaara nidaamka hydralic si ay si hufan ugu beddelaan tamarta tamarta tamar farsamo. Waxay u kaxeeyaan mashiinka si ay u gaaraan inay soo saaraan mooshin toosan ama isu soo rogida wareejinta wax ka yar 360 shahaado. Marka loo eego qaabka ficilkooda, dhululubo kululeeya ayaa loo qaybin karaa saddex nooc: hal {{3 {{{{}} ah), {{4} uu ku dhaqmaayo iyo kala duwanaanshaha. Astaamaha hal - ku dhaqma dhululubo dhululubo ah ayaa ah in bistoolada loo yaqaan 'piston ur' (ama tuubbada) waxaa lagu kaxeeyaa saliida cadaadiska markii ay ku tiirsan tahay ciidamada dibedda sida miisaanka gaariga markii ay soo noqoto; Labalaab - ku dhaqma verralic dhululubo ayaa bixin kara wadista saliida cadaadiska markii looxto bistoolada (ama tuubbada) fidiso oo soo laabto.
