My Mruder (bruder cat320 something look alike)

[cdm]

ordered another 210mm one. this one i couldn't rescue. i resealed it so many times with all sizes of orings but still not good enough. issue is there is only 1 oring @ shaft and that one is supposed to both seal the shaft and the casing where the shaft goes. if you try to oversize it, it won't fit. if you go smaller to seal shaft tighter, the casing area leaks.

their quality control is pretty bad. 1/4 bit the dust. thats 25% failure rate? i know i know sample size too small to claim that but we will see if replacement is good