Shaqooyinka xargaha dhululubada waa:
1. Si wada jir ah oo leh madaxa dhululubada iyo bistoonka, waxay samaysaa goobta shaqada dhululubada.
2. Xadhkaha dhululubada matoorka naaftada ee piston waa hogaanka dhaq-dhaqaaqa soo noqnoqda ee bistoonka, kaas oo lagu sakhiray dhinaca dhinaca bistoonka.
3. Kuleylka piston-ka iyo laftiisa ayaa loo wareejiyaa biyaha qaboojinta si heerkulka shaqada looga dhigo mid habboon.
4. Xadhkaha dhululubada matoorka naaftada ah ee laba-stroke waxa lagu habeeyey deked hawada ah, taas oo la furay oo xidhay piston si loo ogaado qaybinta gaaska.