... including blower casing,Website:http://www.chinapdblower.com, gears,rotors,oil seals, belts & belt cover,gaskets,bearings;Also accessories: ... pulleys,drive couplings,pressure gauge, lubricating oil,no return valve,filters,safety valve,gear oil.Features:Good and correct operation is the ... normal working.During the blower running , the gear oil and grease oil must be enough. Start working, we need to ...