About a year ago I bought a 1450 that had a bad relief valve that would pump the transmission fluid out onto the ground in fairly short order. I bought it and bought a rebuilt or reconditioned relief valve, replaced the filter, and filled with new Hytran and it functioned well for all of last summer. Wife used the mower and the reconditioned relief valve failed during the first mowing this season and pumped the transmission dry. This time around I am buying a pair of used valves to replace the valve and have spare on hand.
Question - is there something that would cause these to fail? The oil in this transmission wasn't excessively dirty when I changed it when I bought it - and the filter didn't show any issues.
Would excessive pump pressure cause these to fail? Can you adjust the pressure? This mower seems a bit more responsive the hydrostat than the 1450 I've owned the last 20 years - but I think this one has a lot less hours of use.
Question - is there something that would cause these to fail? The oil in this transmission wasn't excessively dirty when I changed it when I bought it - and the filter didn't show any issues.
Would excessive pump pressure cause these to fail? Can you adjust the pressure? This mower seems a bit more responsive the hydrostat than the 1450 I've owned the last 20 years - but I think this one has a lot less hours of use.