Hey I ran into same issue with blown seal wondering if you had any luck finding a motor side seal for this mulcherI bought one for my t870, so far I've cut 10ft of brush before I blew the seal. Probably half operator as I've never ran one before. However it came with 3/8 line good to 2200 PSI which is really no good so went to tractor supply got some half inch hose went to my local hydraulic shop got some fittings hooked it up blew the seal out of the side of the hydraulic motor. Currently having a hydraulic shop find me a better pump to run Will keep you posted.