Large belt connect the dowel and to the pump.
Bissell part 160-6418 (1606418).
Replacement pump belt for Bissell cleaners:
ProHeat 2X Revolution Pet - 1548, 15482, 15483, 1548L, 1548P ProHeat 2X Revolution Pet - 1548Q, 1548R, 1548T, 1548U ProHeat 2X Revolution Pet - 1550, 1550F, 1550G, 1551 ProHeat 2X Revolution Pet - 15501, 15504, 15505, 15506, 15507 ProHeat 2X Revolution Pet - 15503, 15506, 15507, 15508 ProHeat 2X Revolution Pet Deluxe - 15481 
