... mixer truck, cement mixer truck8. Garbage truck, Self-loading garbage truck,garbage compactor truck,sealed garbage truck9 ... Vacuum pump is drived by PTO, to self-suck and self-discharge by four-way valve. this ... Vacuum pump is drived by PTO, to self-suck and self-discharge by four-way valve. This ... vacuum pump.The truck is with self-dump, self-discharge and self-sucking function.It will tank about 4- ...