Hand push lawn mower (BA2)

spear and jackson 50 percent wider cut.
This mower is only 2 and a half years old. Last year, I had a flood, and I could not get the mower through the grass. The roller keeps coming off, so it needs to be taken apart, sharpened, and assembled tighter. photos tomorrow, it needs to be gone by the 16th as I am having a collection that day The mower does work on the top notch or high cit but I could not get it through on the low cut