I just changed the oil on my JD Z720A with 25hp Kohler Command Pro yesterday and put a Fram Ultra xg3600 filter on it. I will likely keep using a 3600 oil filter since it fits the machine just fine, clearance is not an issue, and the media size on the JD filter is likely adequate, though minuscule.
The Machine has 415 hours on it, I change the filter once a year and will change the oil twice a year or so. I put roughly 65 to 85 hours a year on the machine and run Mobil 1 full synthetic at the manufacturer specified weight of 10w30.
When this machine was new the junk that came out of the first oil change at 5 hours was alarming, there was all kinds of nasty looking junk, I almost think there was some casting sand in the oil. I changed it several more times until the machine reached 25 hours or so and than ran with my current OCI. The Oil stays fairly clean looking now, and the machine runs flawlessly.
I dissected the old oil filter and I also had the oil filter from last years oil change in the disposal bin so I cut it open as well.
The filters appeared to have very good construction quality, the older of the two filters which sat in my oil filter bin for a year has some kind of corrosion or material embedded in the metal of the can and the spring. I was alarmed when I first seen this, however I cannot get the material to come off, so I doubt it came from the engine. I assume it came from the factory that way or it happened while on the shelf, however due to the length of time it sat after it was used I cannot say for sure this is the case. Oddly enough this filter also had some molding flash on the ADBV and a slightly sloppy application of glue on the end caps. The filter media seemed to be sealed everywhere and the ADBV was soft and pliable.
The filter I just took off looked great, no concerns in my book. ADBV was great and the glue application was neat and uniform.
There is a combination Bypass valve-Spring assembly on the filter which appears to be well made. I don't see how you would get a perfect seal of the pressure relief being it is metal to metal, but I bet its darn close. Maybe I put to much thought into filters possibly bypassing some oil around the filter due to sealing issues.
I would have no problem continuing to use these filters.
The Machine has 415 hours on it, I change the filter once a year and will change the oil twice a year or so. I put roughly 65 to 85 hours a year on the machine and run Mobil 1 full synthetic at the manufacturer specified weight of 10w30.
When this machine was new the junk that came out of the first oil change at 5 hours was alarming, there was all kinds of nasty looking junk, I almost think there was some casting sand in the oil. I changed it several more times until the machine reached 25 hours or so and than ran with my current OCI. The Oil stays fairly clean looking now, and the machine runs flawlessly.
I dissected the old oil filter and I also had the oil filter from last years oil change in the disposal bin so I cut it open as well.
The filters appeared to have very good construction quality, the older of the two filters which sat in my oil filter bin for a year has some kind of corrosion or material embedded in the metal of the can and the spring. I was alarmed when I first seen this, however I cannot get the material to come off, so I doubt it came from the engine. I assume it came from the factory that way or it happened while on the shelf, however due to the length of time it sat after it was used I cannot say for sure this is the case. Oddly enough this filter also had some molding flash on the ADBV and a slightly sloppy application of glue on the end caps. The filter media seemed to be sealed everywhere and the ADBV was soft and pliable.
The filter I just took off looked great, no concerns in my book. ADBV was great and the glue application was neat and uniform.
There is a combination Bypass valve-Spring assembly on the filter which appears to be well made. I don't see how you would get a perfect seal of the pressure relief being it is metal to metal, but I bet its darn close. Maybe I put to much thought into filters possibly bypassing some oil around the filter due to sealing issues.
I would have no problem continuing to use these filters.
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